Repository: ppinard/matplotlib-scalebar (language: python)

Issue:
State support for Python 3.11 in package metadata
The CI has passed three times with Python 3.11 the last three months, so it seems like Python 3.11 is supported. This PR states this support in the package metadata.

I've also updated CI actions to use latest versions.

From my experience depending on `matplotlib-scalebar` in other packages (e.g. orix), Python 3.7 is still supported. I suggest to leave this support in the package metadata.


Discussion / hints:

Fix patch:
diff --git a/.coveragerc b/.coveragerc
index 39bb134..36118ef 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,2 +1,4 @@
 [run]
-omit=matplotlib_scalebar/_version.py
\ No newline at end of file
+omit=
+    matplotlib_scalebar/_version.py
+    matplotlib_scalebar/test_*.py
\ No newline at end of file
diff --git a/.gitattributes b/.gitattributes
deleted file mode 100644
index af69011..0000000
--- a/.gitattributes
+++ /dev/null
@@ -1,1 +0,0 @@
-matplotlib_scalebar/_version.py export-subst
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8d6dbcf..0e654a7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,15 +18,15 @@ jobs:
         matplotlib-version: [latest, dev]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Cache pip
-        uses: actions/cache@v1
+        uses: actions/cache@v3
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
@@ -36,9 +36,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip codecov
-          pip install --upgrade -e .
-          pip install -r requirements-test.txt
+          python -m pip install --upgrade pip hatch codecov
 
       - name: Install matplotlib dev
         if: matrix.matplotlib-version == 'dev'
@@ -46,7 +44,7 @@ jobs:
           pip install --upgrade git+https://github.com/matplotlib/matplotlib
 
       - name: Test
-        run: pytest
+        run: hatch run test
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v3
diff --git a/.gitignore b/.gitignore
index 8e9a0f6..19d3cc6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+matplotlib_scalebar/_version.py
 
 # Created by https://www.gitignore.io/api/code,python,pycharm,eclipse
 # Edit at https://www.gitignore.io/?templates=code,python,pycharm,eclipse
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f7e6ca4..da9fef4 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,11 +1,14 @@
 repos:
   - repo: https://github.com/psf/black
-    rev: stable
+    rev: 23.1.0
     hooks:
       - id: black
-        language_version: python3.7
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.4.0
+    rev: v4.4.0
     hooks:
-      - id: requirements-txt-fixer
-      - id: check-yaml
\ No newline at end of file
+      - id: check-yaml
+      - id: check-toml
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: 'v0.0.245'
+    hooks:
+      - id: ruff
\ No newline at end of file
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index 1dc326f..0000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1,3 +0,0 @@
-include versioneer.py
-include matplotlib_scalebar/_version.py
-include LICENSE
diff --git a/README.md b/README.md
index 809edbe..23eff14 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,14 @@
 ![CI](https://github.com/ppinard/matplotlib-scalebar/workflows/CI/badge.svg)
 ![PyPI](https://img.shields.io/pypi/v/matplotlib-scalebar)
 
+---
+
+**Documentation**: See below
+
+**Source Code**: https://github.com/ppinard/matplotlib-scalebar
+
+---
+
 Provides a new artist for [matplotlib](https://matplotlib.org) to display a scale bar, aka micron bar.
 It is particularly useful when displaying calibrated images plotted using
 `plt.imshow(...)`.
@@ -23,7 +31,10 @@ For development installation from the git repository:
 
 ```bash
 git clone git@github.com:ppinard/matplotlib-scalebar.git
-pip install -e matplotlib-scalebar
+cd matplotlib-scalebar
+pip install hatch
+hatch env create
+hatch run test
 ```
 
 ## Getting started
diff --git a/doc/example_angular.py b/doc/example_angular.py
index 8c0d043..7093504 100644
--- a/doc/example_angular.py
+++ b/doc/example_angular.py
@@ -1,12 +1,11 @@
 import numpy as np
 import matplotlib.pyplot as plt
-import matplotlib.cbook as cbook
 from matplotlib_scalebar.scalebar import ScaleBar, ANGULAR
 
 delta = 0.025
 x = y = np.arange(-3.0, 3.0, delta)
 X, Y = np.meshgrid(x, y)
-Z1 = np.exp(-(X ** 2) - Y ** 2)
+Z1 = np.exp(-(X**2) - Y**2)
 Z2 = np.exp(-((X - 1) ** 2) - (Y - 1) ** 2)
 Z = (Z1 - Z2) * 2
 
diff --git a/doc/splashscreen.py b/doc/splashscreen.py
index c20de95..92b6f87 100644
--- a/doc/splashscreen.py
+++ b/doc/splashscreen.py
@@ -12,7 +12,8 @@
 
 ax.imshow(im, "gray")
 
-# According to Wikipedia, "the bean shaped grain in the bottom left corner is about 50 μm long."
+# According to Wikipedia, 
+# "the bean shaped grain in the bottom left corner is about 50 μm long."
 scalebar = ScaleBar(
     50 / 144, "um", location="lower right", width_fraction=0.02, border_pad=1, pad=0.5
 )
diff --git a/matplotlib_scalebar/__init__.py b/matplotlib_scalebar/__init__.py
index 80edaf0..8dee4bf 100644
--- a/matplotlib_scalebar/__init__.py
+++ b/matplotlib_scalebar/__init__.py
@@ -1,4 +1,1 @@
-from ._version import get_versions
-
-__version__ = get_versions()["version"]
-del get_versions
+from ._version import __version__
diff --git a/matplotlib_scalebar/_version.py b/matplotlib_scalebar/_version.py
deleted file mode 100644
index dba8f59..0000000
--- a/matplotlib_scalebar/_version.py
+++ /dev/null
@@ -1,483 +0,0 @@
-# This file helps to compute a version number in source trees obtained from
-# git-archive tarball (such as those provided by githubs download-from-tag
-# feature). Distribution tarballs (built by setup.py sdist) and build
-# directories (produced by setup.py build) will contain a much shorter file
-# that just contains the computed version number.
-
-# This file is released into the public domain. Generated by
-# versioneer-0.15 (https://github.com/warner/python-versioneer)
-
-import errno
-import os
-import re
-import subprocess
-import sys
-
-
-def get_keywords():
-    # these strings will be replaced by git during git-archive.
-    # setup.py/versioneer.py will grep for the variable names, so they must
-    # each be defined on a line of their own. _version.py will just call
-    # get_keywords().
-    git_refnames = "$Format:%d$"
-    git_full = "$Format:%H$"
-    keywords = {"refnames": git_refnames, "full": git_full}
-    return keywords
-
-
-class VersioneerConfig:
-    pass
-
-
-def get_config():
-    # these strings are filled in when 'setup.py versioneer' creates
-    # _version.py
-    cfg = VersioneerConfig()
-    cfg.VCS = "git"
-    cfg.style = "pep440"
-    cfg.tag_prefix = ""
-    cfg.parentdir_prefix = "matplotlib-scalebar-"
-    cfg.versionfile_source = "matplotlib_scalebar/_version.py"
-    cfg.verbose = False
-    return cfg
-
-
-class NotThisMethod(Exception):
-    pass
-
-
-LONG_VERSION_PY = {}
-HANDLERS = {}
-
-
-def register_vcs_handler(vcs, method):  # decorator
-    def decorate(f):
-        if vcs not in HANDLERS:
-            HANDLERS[vcs] = {}
-        HANDLERS[vcs][method] = f
-        return f
-
-    return decorate
-
-
-def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
-    assert isinstance(commands, list)
-    p = None
-    for c in commands:
-        try:
-            dispcmd = str([c] + args)
-            # remember shell=False, so use git.cmd on windows, not just git
-            p = subprocess.Popen(
-                [c] + args,
-                cwd=cwd,
-                stdout=subprocess.PIPE,
-                stderr=(subprocess.PIPE if hide_stderr else None),
-            )
-            break
-        except EnvironmentError:
-            e = sys.exc_info()[1]
-            if e.errno == errno.ENOENT:
-                continue
-            if verbose:
-                print("unable to run %s" % dispcmd)
-                print(e)
-            return None
-    else:
-        if verbose:
-            print("unable to find command, tried %s" % (commands,))
-        return None
-    stdout = p.communicate()[0].strip()
-    if sys.version_info[0] >= 3:
-        stdout = stdout.decode()
-    if p.returncode != 0:
-        if verbose:
-            print("unable to run %s (error)" % dispcmd)
-        return None
-    return stdout
-
-
-def versions_from_parentdir(parentdir_prefix, root, verbose):
-    # Source tarballs conventionally unpack into a directory that includes
-    # both the project name and a version string.
-    dirname = os.path.basename(root)
-    if not dirname.startswith(parentdir_prefix):
-        if verbose:
-            print(
-                "guessing rootdir is '%s', but '%s' doesn't start with "
-                "prefix '%s'" % (root, dirname, parentdir_prefix)
-            )
-        raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
-    return {
-        "version": dirname[len(parentdir_prefix) :],
-        "full-revisionid": None,
-        "dirty": False,
-        "error": None,
-    }
-
-
-@register_vcs_handler("git", "get_keywords")
-def git_get_keywords(versionfile_abs):
-    # the code embedded in _version.py can just fetch the value of these
-    # keywords. When used from setup.py, we don't want to import _version.py,
-    # so we do it with a regexp instead. This function is not used from
-    # _version.py.
-    keywords = {}
-    try:
-        f = open(versionfile_abs, "r")
-        for line in f.readlines():
-            if line.strip().startswith("git_refnames ="):
-                mo = re.search(r'=\s*"(.*)"', line)
-                if mo:
-                    keywords["refnames"] = mo.group(1)
-            if line.strip().startswith("git_full ="):
-                mo = re.search(r'=\s*"(.*)"', line)
-                if mo:
-                    keywords["full"] = mo.group(1)
-        f.close()
-    except EnvironmentError:
-        pass
-    return keywords
-
-
-@register_vcs_handler("git", "keywords")
-def git_versions_from_keywords(keywords, tag_prefix, verbose):
-    if not keywords:
-        raise NotThisMethod("no keywords at all, weird")
-    refnames = keywords["refnames"].strip()
-    if refnames.startswith("$Format"):
-        if verbose:
-            print("keywords are unexpanded, not using")
-        raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
-    refs = set([r.strip() for r in refnames.strip("()").split(",")])
-    # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
-    # just "foo-1.0". If we see a "tag: " prefix, prefer those.
-    TAG = "tag: "
-    tags = set([r[len(TAG) :] for r in refs if r.startswith(TAG)])
-    if not tags:
-        # Either we're using git < 1.8.3, or there really are no tags. We use
-        # a heuristic: assume all version tags have a digit. The old git %d
-        # expansion behaves like git log --decorate=short and strips out the
-        # refs/heads/ and refs/tags/ prefixes that would let us distinguish
-        # between branches and tags. By ignoring refnames without digits, we
-        # filter out many common branch names like "release" and
-        # "stabilization", as well as "HEAD" and "master".
-        tags = set([r for r in refs if re.search(r"\d", r)])
-        if verbose:
-            print("discarding '%s', no digits" % ",".join(refs - tags))
-    if verbose:
-        print("likely tags: %s" % ",".join(sorted(tags)))
-    for ref in sorted(tags):
-        # sorting will prefer e.g. "2.0" over "2.0rc1"
-        if ref.startswith(tag_prefix):
-            r = ref[len(tag_prefix) :]
-            if verbose:
-                print("picking %s" % r)
-            return {
-                "version": r,
-                "full-revisionid": keywords["full"].strip(),
-                "dirty": False,
-                "error": None,
-            }
-    # no suitable tags, so version is "0+unknown", but full hex is still there
-    if verbose:
-        print("no suitable tags, using unknown + full revision id")
-    return {
-        "version": "0+unknown",
-        "full-revisionid": keywords["full"].strip(),
-        "dirty": False,
-        "error": "no suitable tags",
-    }
-
-
-@register_vcs_handler("git", "pieces_from_vcs")
-def git_pieces_from_vcs(tag_prefix, root, verbose, run_command=run_command):
-    # this runs 'git' from the root of the source tree. This only gets called
-    # if the git-archive 'subst' keywords were *not* expanded, and
-    # _version.py hasn't already been rewritten with a short version string,
-    # meaning we're inside a checked out source tree.
-
-    if not os.path.exists(os.path.join(root, ".git")):
-        if verbose:
-            print("no .git in %s" % root)
-        raise NotThisMethod("no .git directory")
-
-    GITS = ["git"]
-    if sys.platform == "win32":
-        GITS = ["git.cmd", "git.exe"]
-    # if there is a tag, this yields TAG-NUM-gHEX[-dirty]
-    # if there are no tags, this yields HEX[-dirty] (no NUM)
-    describe_out = run_command(
-        GITS, ["describe", "--tags", "--dirty", "--always", "--long"], cwd=root
-    )
-    # --long was added in git-1.5.5
-    if describe_out is None:
-        raise NotThisMethod("'git describe' failed")
-    describe_out = describe_out.strip()
-    full_out = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
-    if full_out is None:
-        raise NotThisMethod("'git rev-parse' failed")
-    full_out = full_out.strip()
-
-    pieces = {}
-    pieces["long"] = full_out
-    pieces["short"] = full_out[:7]  # maybe improved later
-    pieces["error"] = None
-
-    # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
-    # TAG might have hyphens.
-    git_describe = describe_out
-
-    # look for -dirty suffix
-    dirty = git_describe.endswith("-dirty")
-    pieces["dirty"] = dirty
-    if dirty:
-        git_describe = git_describe[: git_describe.rindex("-dirty")]
-
-    # now we have TAG-NUM-gHEX or HEX
-
-    if "-" in git_describe:
-        # TAG-NUM-gHEX
-        mo = re.search(r"^(.+)-(\d+)-g([0-9a-f]+)$", git_describe)
-        if not mo:
-            # unparseable. Maybe git-describe is misbehaving?
-            pieces["error"] = "unable to parse git-describe output: '%s'" % describe_out
-            return pieces
-
-        # tag
-        full_tag = mo.group(1)
-        if not full_tag.startswith(tag_prefix):
-            if verbose:
-                fmt = "tag '%s' doesn't start with prefix '%s'"
-                print(fmt % (full_tag, tag_prefix))
-            pieces["error"] = "tag '%s' doesn't start with prefix '%s'" % (
-                full_tag,
-                tag_prefix,
-            )
-            return pieces
-        pieces["closest-tag"] = full_tag[len(tag_prefix) :]
-
-        # distance: number of commits since tag
-        pieces["distance"] = int(mo.group(2))
-
-        # commit: short hex revision ID
-        pieces["short"] = mo.group(3)
-
-    else:
-        # HEX: no tags
-        pieces["closest-tag"] = None
-        count_out = run_command(GITS, ["rev-list", "HEAD", "--count"], cwd=root)
-        pieces["distance"] = int(count_out)  # total number of commits
-
-    return pieces
-
-
-def plus_or_dot(pieces):
-    if "+" in pieces.get("closest-tag", ""):
-        return "."
-    return "+"
-
-
-def render_pep440(pieces):
-    # now build up version string, with post-release "local version
-    # identifier". Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
-    # get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty
-
-    # exceptions:
-    # 1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += plus_or_dot(pieces)
-            rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
-            if pieces["dirty"]:
-                rendered += ".dirty"
-    else:
-        # exception #1
-        rendered = "0+untagged.%d.g%s" % (pieces["distance"], pieces["short"])
-        if pieces["dirty"]:
-            rendered += ".dirty"
-    return rendered
-
-
-def render_pep440_pre(pieces):
-    # TAG[.post.devDISTANCE] . No -dirty
-
-    # exceptions:
-    # 1: no tags. 0.post.devDISTANCE
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"]:
-            rendered += ".post.dev%d" % pieces["distance"]
-    else:
-        # exception #1
-        rendered = "0.post.dev%d" % pieces["distance"]
-    return rendered
-
-
-def render_pep440_post(pieces):
-    # TAG[.postDISTANCE[.dev0]+gHEX] . The ".dev0" means dirty. Note that
-    # .dev0 sorts backwards (a dirty tree will appear "older" than the
-    # corresponding clean one), but you shouldn't be releasing software with
-    # -dirty anyways.
-
-    # exceptions:
-    # 1: no tags. 0.postDISTANCE[.dev0]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += ".post%d" % pieces["distance"]
-            if pieces["dirty"]:
-                rendered += ".dev0"
-            rendered += plus_or_dot(pieces)
-            rendered += "g%s" % pieces["short"]
-    else:
-        # exception #1
-        rendered = "0.post%d" % pieces["distance"]
-        if pieces["dirty"]:
-            rendered += ".dev0"
-        rendered += "+g%s" % pieces["short"]
-    return rendered
-
-
-def render_pep440_old(pieces):
-    # TAG[.postDISTANCE[.dev0]] . The ".dev0" means dirty.
-
-    # exceptions:
-    # 1: no tags. 0.postDISTANCE[.dev0]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += ".post%d" % pieces["distance"]
-            if pieces["dirty"]:
-                rendered += ".dev0"
-    else:
-        # exception #1
-        rendered = "0.post%d" % pieces["distance"]
-        if pieces["dirty"]:
-            rendered += ".dev0"
-    return rendered
-
-
-def render_git_describe(pieces):
-    # TAG[-DISTANCE-gHEX][-dirty], like 'git describe --tags --dirty
-    # --always'
-
-    # exceptions:
-    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"]:
-            rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
-    else:
-        # exception #1
-        rendered = pieces["short"]
-    if pieces["dirty"]:
-        rendered += "-dirty"
-    return rendered
-
-
-def render_git_describe_long(pieces):
-    # TAG-DISTANCE-gHEX[-dirty], like 'git describe --tags --dirty
-    # --always -long'. The distance/hash is unconditional.
-
-    # exceptions:
-    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
-    else:
-        # exception #1
-        rendered = pieces["short"]
-    if pieces["dirty"]:
-        rendered += "-dirty"
-    return rendered
-
-
-def render(pieces, style):
-    if pieces["error"]:
-        return {
-            "version": "unknown",
-            "full-revisionid": pieces.get("long"),
-            "dirty": None,
-            "error": pieces["error"],
-        }
-
-    if not style or style == "default":
-        style = "pep440"  # the default
-
-    if style == "pep440":
-        rendered = render_pep440(pieces)
-    elif style == "pep440-pre":
-        rendered = render_pep440_pre(pieces)
-    elif style == "pep440-post":
-        rendered = render_pep440_post(pieces)
-    elif style == "pep440-old":
-        rendered = render_pep440_old(pieces)
-    elif style == "git-describe":
-        rendered = render_git_describe(pieces)
-    elif style == "git-describe-long":
-        rendered = render_git_describe_long(pieces)
-    else:
-        raise ValueError("unknown style '%s'" % style)
-
-    return {
-        "version": rendered,
-        "full-revisionid": pieces["long"],
-        "dirty": pieces["dirty"],
-        "error": None,
-    }
-
-
-def get_versions():
-    # I am in _version.py, which lives at ROOT/VERSIONFILE_SOURCE. If we have
-    # __file__, we can work backwards from there to the root. Some
-    # py2exe/bbfreeze/non-CPython implementations don't do __file__, in which
-    # case we can only use expanded keywords.
-
-    cfg = get_config()
-    verbose = cfg.verbose
-
-    try:
-        return git_versions_from_keywords(get_keywords(), cfg.tag_prefix, verbose)
-    except NotThisMethod:
-        pass
-
-    try:
-        root = os.path.realpath(__file__)
-        # versionfile_source is the relative path from the top of the source
-        # tree (where the .git directory might live) to this file. Invert
-        # this to find the root from __file__.
-        for i in cfg.versionfile_source.split("/"):
-            root = os.path.dirname(root)
-    except NameError:
-        return {
-            "version": "0+unknown",
-            "full-revisionid": None,
-            "dirty": None,
-            "error": "unable to find root of source tree",
-        }
-
-    try:
-        pieces = git_pieces_from_vcs(cfg.tag_prefix, root, verbose)
-        return render(pieces, cfg.style)
-    except NotThisMethod:
-        pass
-
-    try:
-        if cfg.parentdir_prefix:
-            return versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
-    except NotThisMethod:
-        pass
-
-    return {
-        "version": "0+unknown",
-        "full-revisionid": None,
-        "dirty": None,
-        "error": "unable to compute version",
-    }
diff --git a/matplotlib_scalebar/scalebar.py b/matplotlib_scalebar/scalebar.py
index 3438845..0ef6325 100644
--- a/matplotlib_scalebar/scalebar.py
+++ b/matplotlib_scalebar/scalebar.py
@@ -139,7 +139,6 @@ def _validate_legend_loc(loc):
 
 
 class ScaleBar(Artist):
-
     zorder = 6
 
     _PREFERRED_VALUES = [1, 2, 5, 10, 15, 20, 25, 50, 75, 100, 125, 150, 200, 500, 750]
@@ -306,14 +305,16 @@ def __init__(
         # Deprecation
         if height_fraction is not None:
             warnings.warn(
-                "The height_fraction argument was deprecated. Use width_fraction instead.",
+                "The height_fraction argument was deprecated. "
+                "Use width_fraction instead.",
                 DeprecationWarning,
             )
             width_fraction = width_fraction or height_fraction
 
         if label_formatter is not None:
             warnings.warn(
-                "The label_formatter argument was deprecated. Use scale_formatter instead.",
+                "The label_formatter argument was deprecated. "
+                "Use scale_formatter instead.",
                 DeprecationWarning,
             )
             scale_formatter = scale_formatter or label_formatter
@@ -586,14 +587,16 @@ def set_width_fraction(self, fraction):
 
     def get_height_fraction(self):
         warnings.warn(
-            "The get_height_fraction method is deprecated. Use get_width_fraction instead.",
+            "The get_height_fraction method is deprecated. "
+            "Use get_width_fraction instead.",
             DeprecationWarning,
         )
         return self.width_fraction
 
     def set_height_fraction(self, fraction):
         warnings.warn(
-            "The set_height_fraction method is deprecated. Use set_width_fraction instead.",
+            "The set_height_fraction method is deprecated. "
+            "Use set_width_fraction instead.",
             DeprecationWarning,
         )
         self.width_fraction = fraction
@@ -741,14 +744,16 @@ def set_scale_formatter(self, scale_formatter):
 
     def get_label_formatter(self):
         warnings.warn(
-            "The get_label_formatter method is deprecated. Use get_scale_formatter instead.",
+            "The get_label_formatter method is deprecated. "
+            "Use get_scale_formatter instead.",
             DeprecationWarning,
         )
         return self.scale_formatter
 
     def set_label_formatter(self, scale_formatter):
         warnings.warn(
-            "The set_label_formatter method is deprecated. Use set_scale_formatter instead.",
+            "The set_label_formatter method is deprecated. "
+            "Use set_scale_formatter instead.",
             DeprecationWarning,
         )
         self.scale_formatter = scale_formatter
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..b60b357
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,63 @@
+[build-system]
+requires = ["hatchling", "hatch-vcs"]
+build-backend = "hatchling.build"
+
+[project]
+name = "matplotlib-scalebar"
+dynamic = ["version"]
+description = "Artist for matplotlib to display a scale bar"
+readme = "README.md"
+license = "BSD-2-clause"
+requires-python = ">=3.9"
+authors = [
+    { name = "Philippe Pinard", email = "philippe.pinard@gmail.com" },
+]
+maintainers = [
+    { name = "Philippe Pinard", email = "philippe.pinard@gmail.com" },
+]
+keywords = [
+    "bar",
+    "matplotlib",
+    "micron",
+    "scale",
+]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Framework :: Matplotlib",
+    "Intended Audience :: Science/Research",
+    "License :: OSI Approved :: BSD License",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Topic :: Scientific/Engineering :: Visualization",
+]
+dependencies = [
+    "matplotlib",
+]
+
+[project.urls]
+Homepage = "https://github.com/ppinard/matplotlib-scalebar"
+Tracker = "https://github.com/ppinard/matplotlib-scalebar/issues"
+Source = "https://github.com/ppinard/matplotlib-scalebar"
+
+[tool.hatch.version]
+source = "vcs"
+
+[tool.hatch.build.hooks.vcs]
+version-file = "matplotlib_scalebar/_version.py"
+
+[tool.hatch.envs.default]
+dependencies = [
+  "pytest",
+  "pytest-cov",
+  "ruff"
+]
+
+[tool.hatch.envs.default.scripts]
+test = "pytest -W error::Warning --cov=matplotlib_scalebar --cov-report term --cov-report xml"
+lint = "ruff check ."
+
+[tool.ruff.per-file-ignores]
+"__init__.py" = ["F401"]
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 6ccafc3..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,1 +0,0 @@
-matplotlib
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index a4f6284..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,17 +0,0 @@
-[bdist_wheel]
-universal=1
-
-[nosetests]
-with-xunit = 1
-with-coverage = 1
-cover-xml = 1
-cover-erase = 1
-cover-package = matplotlib_scalebar
-
-[versioneer]
-VCS = git
-style = pep440
-versionfile_source = matplotlib_scalebar/_version.py
-versionfile_build = matplotlib_scalebar/_version.py
-tag_prefix =
-parentdir_prefix = matplotlib-scalebar-
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 92750cf..0000000
--- a/setup.py
+++ /dev/null
@@ -1,50 +0,0 @@
-#!/usr/bin/env python
-
-# Standard library modules.
-from pathlib import Path
-
-# Third party modules.
-from setuptools import setup, find_packages
-
-# Local modules.
-import versioneer
-
-# Globals and constants variables.
-BASEDIR = Path(__file__).parent.resolve()
-
-# Get the long description from the relevant file
-with open(BASEDIR.joinpath("README.md"), "r") as f:
-    long_description = f.read()
-
-setup(
-    name="matplotlib-scalebar",
-    version=versioneer.get_version(),
-    description="Artist for matplotlib to display a scale bar",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    author="Philippe Pinard",
-    author_email="philippe.pinard@gmail.com",
-    maintainer="Philippe Pinard",
-    maintainer_email="philippe.pinard@gmail.com",
-    url="https://github.com/ppinard/matplotlib-scalebar",
-    license="BSD",
-    keywords="matplotlib scale micron bar",
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "Intended Audience :: Science/Research",
-        "License :: OSI Approved :: BSD License",
-        "Operating System :: OS Independent",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Topic :: Scientific/Engineering :: Visualization",
-    ],
-    packages=find_packages(),
-    package_data={},
-    python_requires='~=3.7',
-    install_requires=["matplotlib"],
-    zip_safe=True,
-    cmdclass=versioneer.get_cmdclass(),
-)
diff --git a/versioneer.py b/versioneer.py
deleted file mode 100644
index be311dc..0000000
--- a/versioneer.py
+++ /dev/null
@@ -1,1749 +0,0 @@
-# Version: 0.15
-
-"""
-The Versioneer
-==============
-
-* like a rocketeer, but for versions!
-* https://github.com/warner/python-versioneer
-* Brian Warner
-* License: Public Domain
-* Compatible With: python2.6, 2.7, 3.2, 3.3, 3.4, and pypy
-* [![Latest Version]
-(https://pypip.in/version/versioneer/badge.svg?style=flat)
-](https://pypi.python.org/pypi/versioneer/)
-* [![Build Status]
-(https://travis-ci.org/warner/python-versioneer.png?branch=master)
-](https://travis-ci.org/warner/python-versioneer)
-
-This is a tool for managing a recorded version number in distutils-based
-python projects. The goal is to remove the tedious and error-prone "update
-the embedded version string" step from your release process. Making a new
-release should be as easy as recording a new tag in your version-control
-system, and maybe making new tarballs.
-
-
-## Quick Install
-
-* `pip install versioneer` to somewhere to your $PATH
-* add a `[versioneer]` section to your setup.cfg (see below)
-* run `versioneer install` in your source tree, commit the results
-
-## Version Identifiers
-
-Source trees come from a variety of places:
-
-* a version-control system checkout (mostly used by developers)
-* a nightly tarball, produced by build automation
-* a snapshot tarball, produced by a web-based VCS browser, like github's
-  "tarball from tag" feature
-* a release tarball, produced by "setup.py sdist", distributed through PyPI
-
-Within each source tree, the version identifier (either a string or a number,
-this tool is format-agnostic) can come from a variety of places:
-
-* ask the VCS tool itself, e.g. "git describe" (for checkouts), which knows
-  about recent "tags" and an absolute revision-id
-* the name of the directory into which the tarball was unpacked
-* an expanded VCS keyword ($Id$, etc)
-* a `_version.py` created by some earlier build step
-
-For released software, the version identifier is closely related to a VCS
-tag. Some projects use tag names that include more than just the version
-string (e.g. "myproject-1.2" instead of just "1.2"), in which case the tool
-needs to strip the tag prefix to extract the version identifier. For
-unreleased software (between tags), the version identifier should provide
-enough information to help developers recreate the same tree, while also
-giving them an idea of roughly how old the tree is (after version 1.2, before
-version 1.3). Many VCS systems can report a description that captures this,
-for example `git describe --tags --dirty --always` reports things like
-"0.7-1-g574ab98-dirty" to indicate that the checkout is one revision past the
-0.7 tag, has a unique revision id of "574ab98", and is "dirty" (it has
-uncommitted changes.
-
-The version identifier is used for multiple purposes:
-
-* to allow the module to self-identify its version: `myproject.__version__`
-* to choose a name and prefix for a 'setup.py sdist' tarball
-
-## Theory of Operation
-
-Versioneer works by adding a special `_version.py` file into your source
-tree, where your `__init__.py` can import it. This `_version.py` knows how to
-dynamically ask the VCS tool for version information at import time.
-
-`_version.py` also contains `$Revision$` markers, and the installation
-process marks `_version.py` to have this marker rewritten with a tag name
-during the `git archive` command. As a result, generated tarballs will
-contain enough information to get the proper version.
-
-To allow `setup.py` to compute a version too, a `versioneer.py` is added to
-the top level of your source tree, next to `setup.py` and the `setup.cfg`
-that configures it. This overrides several distutils/setuptools commands to
-compute the version when invoked, and changes `setup.py build` and `setup.py
-sdist` to replace `_version.py` with a small static file that contains just
-the generated version data.
-
-## Installation
-
-First, decide on values for the following configuration variables:
-
-* `VCS`: the version control system you use. Currently accepts "git".
-
-* `style`: the style of version string to be produced. See "Styles" below for
-  details. Defaults to "pep440", which looks like
-  `TAG[+DISTANCE.gSHORTHASH[.dirty]]`.
-
-* `versionfile_source`:
-
-  A project-relative pathname into which the generated version strings should
-  be written. This is usually a `_version.py` next to your project's main
-  `__init__.py` file, so it can be imported at runtime. If your project uses
-  `src/myproject/__init__.py`, this should be `src/myproject/_version.py`.
-  This file should be checked in to your VCS as usual: the copy created below
-  by `setup.py setup_versioneer` will include code that parses expanded VCS
-  keywords in generated tarballs. The 'build' and 'sdist' commands will
-  replace it with a copy that has just the calculated version string.
-
-  This must be set even if your project does not have any modules (and will
-  therefore never import `_version.py`), since "setup.py sdist" -based trees
-  still need somewhere to record the pre-calculated version strings. Anywhere
-  in the source tree should do. If there is a `__init__.py` next to your
-  `_version.py`, the `setup.py setup_versioneer` command (described below)
-  will append some `__version__`-setting assignments, if they aren't already
-  present.
-
-* `versionfile_build`:
-
-  Like `versionfile_source`, but relative to the build directory instead of
-  the source directory. These will differ when your setup.py uses
-  'package_dir='. If you have `package_dir={'myproject': 'src/myproject'}`,
-  then you will probably have `versionfile_build='myproject/_version.py'` and
-  `versionfile_source='src/myproject/_version.py'`.
-
-  If this is set to None, then `setup.py build` will not attempt to rewrite
-  any `_version.py` in the built tree. If your project does not have any
-  libraries (e.g. if it only builds a script), then you should use
-  `versionfile_build = None` and override `distutils.command.build_scripts`
-  to explicitly insert a copy of `versioneer.get_version()` into your
-  generated script.
-
-* `tag_prefix`:
-
-  a string, like 'PROJECTNAME-', which appears at the start of all VCS tags.
-  If your tags look like 'myproject-1.2.0', then you should use
-  tag_prefix='myproject-'. If you use unprefixed tags like '1.2.0', this
-  should be an empty string.
-
-* `parentdir_prefix`:
-
-  a optional string, frequently the same as tag_prefix, which appears at the
-  start of all unpacked tarball filenames. If your tarball unpacks into
-  'myproject-1.2.0', this should be 'myproject-'. To disable this feature,
-  just omit the field from your `setup.cfg`.
-
-This tool provides one script, named `versioneer`. That script has one mode,
-"install", which writes a copy of `versioneer.py` into the current directory
-and runs `versioneer.py setup` to finish the installation.
-
-To versioneer-enable your project:
-
-* 1: Modify your `setup.cfg`, adding a section named `[versioneer]` and
-  populating it with the configuration values you decided earlier (note that
-  the option names are not case-sensitive):
-
-  ````
-  [versioneer]
-  VCS = git
-  style = pep440
-  versionfile_source = src/myproject/_version.py
-  versionfile_build = myproject/_version.py
-  tag_prefix = ""
-  parentdir_prefix = myproject-
-  ````
-
-* 2: Run `versioneer install`. This will do the following:
-
-  * copy `versioneer.py` into the top of your source tree
-  * create `_version.py` in the right place (`versionfile_source`)
-  * modify your `__init__.py` (if one exists next to `_version.py`) to define
-    `__version__` (by calling a function from `_version.py`)
-  * modify your `MANIFEST.in` to include both `versioneer.py` and the
-    generated `_version.py` in sdist tarballs
-
-  `versioneer install` will complain about any problems it finds with your
-  `setup.py` or `setup.cfg`. Run it multiple times until you have fixed all
-  the problems.
-
-* 3: add a `import versioneer` to your setup.py, and add the following
-  arguments to the setup() call:
-
-        version=versioneer.get_version(),
-        cmdclass=versioneer.get_cmdclass(),
-
-* 4: commit these changes to your VCS. To make sure you won't forget,
-  `versioneer install` will mark everything it touched for addition using
-  `git add`. Don't forget to add `setup.py` and `setup.cfg` too.
-
-## Post-Installation Usage
-
-Once established, all uses of your tree from a VCS checkout should get the
-current version string. All generated tarballs should include an embedded
-version string (so users who unpack them will not need a VCS tool installed).
-
-If you distribute your project through PyPI, then the release process should
-boil down to two steps:
-
-* 1: git tag 1.0
-* 2: python setup.py register sdist upload
-
-If you distribute it through github (i.e. users use github to generate
-tarballs with `git archive`), the process is:
-
-* 1: git tag 1.0
-* 2: git push; git push --tags
-
-Versioneer will report "0+untagged.NUMCOMMITS.gHASH" until your tree has at
-least one tag in its history.
-
-## Version-String Flavors
-
-Code which uses Versioneer can learn about its version string at runtime by
-importing `_version` from your main `__init__.py` file and running the
-`get_versions()` function. From the "outside" (e.g. in `setup.py`), you can
-import the top-level `versioneer.py` and run `get_versions()`.
-
-Both functions return a dictionary with different flavors of version
-information:
-
-* `['version']`: A condensed version string, rendered using the selected
-  style. This is the most commonly used value for the project's version
-  string. The default "pep440" style yields strings like `0.11`,
-  `0.11+2.g1076c97`, or `0.11+2.g1076c97.dirty`. See the "Styles" section
-  below for alternative styles.
-
-* `['full-revisionid']`: detailed revision identifier. For Git, this is the
-  full SHA1 commit id, e.g. "1076c978a8d3cfc70f408fe5974aa6c092c949ac".
-
-* `['dirty']`: a boolean, True if the tree has uncommitted changes. Note that
-  this is only accurate if run in a VCS checkout, otherwise it is likely to
-  be False or None
-
-* `['error']`: if the version string could not be computed, this will be set
-  to a string describing the problem, otherwise it will be None. It may be
-  useful to throw an exception in setup.py if this is set, to avoid e.g.
-  creating tarballs with a version string of "unknown".
-
-Some variants are more useful than others. Including `full-revisionid` in a
-bug report should allow developers to reconstruct the exact code being tested
-(or indicate the presence of local changes that should be shared with the
-developers). `version` is suitable for display in an "about" box or a CLI
-`--version` output: it can be easily compared against release notes and lists
-of bugs fixed in various releases.
-
-The installer adds the following text to your `__init__.py` to place a basic
-version in `YOURPROJECT.__version__`:
-
-    from ._version import get_versions
-    __version__ = get_versions()['version']
-    del get_versions
-
-## Styles
-
-The setup.cfg `style=` configuration controls how the VCS information is
-rendered into a version string.
-
-The default style, "pep440", produces a PEP440-compliant string, equal to the
-un-prefixed tag name for actual releases, and containing an additional "local
-version" section with more detail for in-between builds. For Git, this is
-TAG[+DISTANCE.gHEX[.dirty]] , using information from `git describe --tags
---dirty --always`. For example "0.11+2.g1076c97.dirty" indicates that the
-tree is like the "1076c97" commit but has uncommitted changes (".dirty"), and
-that this commit is two revisions ("+2") beyond the "0.11" tag. For released
-software (exactly equal to a known tag), the identifier will only contain the
-stripped tag, e.g. "0.11".
-
-Other styles are available. See details.md in the Versioneer source tree for
-descriptions.
-
-## Debugging
-
-Versioneer tries to avoid fatal errors: if something goes wrong, it will tend
-to return a version of "0+unknown". To investigate the problem, run `setup.py
-version`, which will run the version-lookup code in a verbose mode, and will
-display the full contents of `get_versions()` (including the `error` string,
-which may help identify what went wrong).
-
-## Updating Versioneer
-
-To upgrade your project to a new release of Versioneer, do the following:
-
-* install the new Versioneer (`pip install -U versioneer` or equivalent)
-* edit `setup.cfg`, if necessary, to include any new configuration settings
-  indicated by the release notes
-* re-run `versioneer install` in your source tree, to replace
-  `SRC/_version.py`
-* commit any changed files
-
-### Upgrading to 0.15
-
-Starting with this version, Versioneer is configured with a `[versioneer]`
-section in your `setup.cfg` file. Earlier versions required the `setup.py` to
-set attributes on the `versioneer` module immediately after import. The new
-version will refuse to run (raising an exception during import) until you
-have provided the necessary `setup.cfg` section.
-
-In addition, the Versioneer package provides an executable named
-`versioneer`, and the installation process is driven by running `versioneer
-install`. In 0.14 and earlier, the executable was named
-`versioneer-installer` and was run without an argument.
-
-### Upgrading to 0.14
-
-0.14 changes the format of the version string. 0.13 and earlier used
-hyphen-separated strings like "0.11-2-g1076c97-dirty". 0.14 and beyond use a
-plus-separated "local version" section strings, with dot-separated
-components, like "0.11+2.g1076c97". PEP440-strict tools did not like the old
-format, but should be ok with the new one.
-
-### Upgrading from 0.11 to 0.12
-
-Nothing special.
-
-### Upgrading from 0.10 to 0.11
-
-You must add a `versioneer.VCS = "git"` to your `setup.py` before re-running
-`setup.py setup_versioneer`. This will enable the use of additional
-version-control systems (SVN, etc) in the future.
-
-## Future Directions
-
-This tool is designed to make it easily extended to other version-control
-systems: all VCS-specific components are in separate directories like
-src/git/ . The top-level `versioneer.py` script is assembled from these
-components by running make-versioneer.py . In the future, make-versioneer.py
-will take a VCS name as an argument, and will construct a version of
-`versioneer.py` that is specific to the given VCS. It might also take the
-configuration arguments that are currently provided manually during
-installation by editing setup.py . Alternatively, it might go the other
-direction and include code from all supported VCS systems, reducing the
-number of intermediate scripts.
-
-
-## License
-
-To make Versioneer easier to embed, all its code is hereby released into the
-public domain. The `_version.py` that it creates is also in the public
-domain.
-
-"""
-
-from __future__ import print_function
-
-try:
-    import configparser
-except ImportError:
-    import ConfigParser as configparser
-import errno
-import json
-import os
-import re
-import subprocess
-import sys
-
-
-class VersioneerConfig:
-    pass
-
-
-def get_root():
-    # we require that all commands are run from the project root, i.e. the
-    # directory that contains setup.py, setup.cfg, and versioneer.py .
-    root = os.path.realpath(os.path.abspath(os.getcwd()))
-    setup_py = os.path.join(root, "setup.py")
-    versioneer_py = os.path.join(root, "versioneer.py")
-    if not (os.path.exists(setup_py) or os.path.exists(versioneer_py)):
-        # allow 'python path/to/setup.py COMMAND'
-        root = os.path.dirname(os.path.realpath(os.path.abspath(sys.argv[0])))
-        setup_py = os.path.join(root, "setup.py")
-        versioneer_py = os.path.join(root, "versioneer.py")
-    if not (os.path.exists(setup_py) or os.path.exists(versioneer_py)):
-        err = (
-            "Versioneer was unable to run the project root directory. "
-            "Versioneer requires setup.py to be executed from "
-            "its immediate directory (like 'python setup.py COMMAND'), "
-            "or in a way that lets it use sys.argv[0] to find the root "
-            "(like 'python path/to/setup.py COMMAND')."
-        )
-        raise VersioneerBadRootError(err)
-    try:
-        # Certain runtime workflows (setup.py install/develop in a setuptools
-        # tree) execute all dependencies in a single python process, so
-        # "versioneer" may be imported multiple times, and python's shared
-        # module-import table will cache the first one. So we can't use
-        # os.path.dirname(__file__), as that will find whichever
-        # versioneer.py was first imported, even in later projects.
-        me = os.path.realpath(os.path.abspath(__file__))
-        if os.path.splitext(me)[0] != os.path.splitext(versioneer_py)[0]:
-            print(
-                "Warning: build in %s is using versioneer.py from %s"
-                % (os.path.dirname(me), versioneer_py)
-            )
-    except NameError:
-        pass
-    return root
-
-
-def get_config_from_root(root):
-    # This might raise EnvironmentError (if setup.cfg is missing), or
-    # configparser.NoSectionError (if it lacks a [versioneer] section), or
-    # configparser.NoOptionError (if it lacks "VCS="). See the docstring at
-    # the top of versioneer.py for instructions on writing your setup.cfg .
-    setup_cfg = os.path.join(root, "setup.cfg")
-    parser = configparser.SafeConfigParser()
-    with open(setup_cfg, "r") as f:
-        parser.readfp(f)
-    VCS = parser.get("versioneer", "VCS")  # mandatory
-
-    def get(parser, name):
-        if parser.has_option("versioneer", name):
-            return parser.get("versioneer", name)
-        return None
-
-    cfg = VersioneerConfig()
-    cfg.VCS = VCS
-    cfg.style = get(parser, "style") or ""
-    cfg.versionfile_source = get(parser, "versionfile_source")
-    cfg.versionfile_build = get(parser, "versionfile_build")
-    cfg.tag_prefix = get(parser, "tag_prefix")
-    cfg.parentdir_prefix = get(parser, "parentdir_prefix")
-    cfg.verbose = get(parser, "verbose")
-    return cfg
-
-
-class NotThisMethod(Exception):
-    pass
-
-
-# these dictionaries contain VCS-specific tools
-LONG_VERSION_PY = {}
-HANDLERS = {}
-
-
-def register_vcs_handler(vcs, method):  # decorator
-    def decorate(f):
-        if vcs not in HANDLERS:
-            HANDLERS[vcs] = {}
-        HANDLERS[vcs][method] = f
-        return f
-
-    return decorate
-
-
-def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
-    assert isinstance(commands, list)
-    p = None
-    for c in commands:
-        try:
-            dispcmd = str([c] + args)
-            # remember shell=False, so use git.cmd on windows, not just git
-            p = subprocess.Popen(
-                [c] + args,
-                cwd=cwd,
-                stdout=subprocess.PIPE,
-                stderr=(subprocess.PIPE if hide_stderr else None),
-            )
-            break
-        except EnvironmentError:
-            e = sys.exc_info()[1]
-            if e.errno == errno.ENOENT:
-                continue
-            if verbose:
-                print("unable to run %s" % dispcmd)
-                print(e)
-            return None
-    else:
-        if verbose:
-            print("unable to find command, tried %s" % (commands,))
-        return None
-    stdout = p.communicate()[0].strip()
-    if sys.version_info[0] >= 3:
-        stdout = stdout.decode()
-    if p.returncode != 0:
-        if verbose:
-            print("unable to run %s (error)" % dispcmd)
-        return None
-    return stdout
-
-
-LONG_VERSION_PY[
-    "git"
-] = """
-# This file helps to compute a version number in source trees obtained from
-# git-archive tarball (such as those provided by githubs download-from-tag
-# feature). Distribution tarballs (built by setup.py sdist) and build
-# directories (produced by setup.py build) will contain a much shorter file
-# that just contains the computed version number.
-
-# This file is released into the public domain. Generated by
-# versioneer-0.15 (https://github.com/warner/python-versioneer)
-
-import errno
-import os
-import re
-import subprocess
-import sys
-
-
-def get_keywords():
-    # these strings will be replaced by git during git-archive.
-    # setup.py/versioneer.py will grep for the variable names, so they must
-    # each be defined on a line of their own. _version.py will just call
-    # get_keywords().
-    git_refnames = "%(DOLLAR)sFormat:%%d%(DOLLAR)s"
-    git_full = "%(DOLLAR)sFormat:%%H%(DOLLAR)s"
-    keywords = {"refnames": git_refnames, "full": git_full}
-    return keywords
-
-
-class VersioneerConfig:
-    pass
-
-
-def get_config():
-    # these strings are filled in when 'setup.py versioneer' creates
-    # _version.py
-    cfg = VersioneerConfig()
-    cfg.VCS = "git"
-    cfg.style = "%(STYLE)s"
-    cfg.tag_prefix = "%(TAG_PREFIX)s"
-    cfg.parentdir_prefix = "%(PARENTDIR_PREFIX)s"
-    cfg.versionfile_source = "%(VERSIONFILE_SOURCE)s"
-    cfg.verbose = False
-    return cfg
-
-
-class NotThisMethod(Exception):
-    pass
-
-
-LONG_VERSION_PY = {}
-HANDLERS = {}
-
-
-def register_vcs_handler(vcs, method):  # decorator
-    def decorate(f):
-        if vcs not in HANDLERS:
-            HANDLERS[vcs] = {}
-        HANDLERS[vcs][method] = f
-        return f
-    return decorate
-
-
-def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False):
-    assert isinstance(commands, list)
-    p = None
-    for c in commands:
-        try:
-            dispcmd = str([c] + args)
-            # remember shell=False, so use git.cmd on windows, not just git
-            p = subprocess.Popen([c] + args, cwd=cwd, stdout=subprocess.PIPE,
-                                 stderr=(subprocess.PIPE if hide_stderr
-                                         else None))
-            break
-        except EnvironmentError:
-            e = sys.exc_info()[1]
-            if e.errno == errno.ENOENT:
-                continue
-            if verbose:
-                print("unable to run %%s" %% dispcmd)
-                print(e)
-            return None
-    else:
-        if verbose:
-            print("unable to find command, tried %%s" %% (commands,))
-        return None
-    stdout = p.communicate()[0].strip()
-    if sys.version_info[0] >= 3:
-        stdout = stdout.decode()
-    if p.returncode != 0:
-        if verbose:
-            print("unable to run %%s (error)" %% dispcmd)
-        return None
-    return stdout
-
-
-def versions_from_parentdir(parentdir_prefix, root, verbose):
-    # Source tarballs conventionally unpack into a directory that includes
-    # both the project name and a version string.
-    dirname = os.path.basename(root)
-    if not dirname.startswith(parentdir_prefix):
-        if verbose:
-            print("guessing rootdir is '%%s', but '%%s' doesn't start with "
-                  "prefix '%%s'" %% (root, dirname, parentdir_prefix))
-        raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
-    return {"version": dirname[len(parentdir_prefix):],
-            "full-revisionid": None,
-            "dirty": False, "error": None}
-
-
-@register_vcs_handler("git", "get_keywords")
-def git_get_keywords(versionfile_abs):
-    # the code embedded in _version.py can just fetch the value of these
-    # keywords. When used from setup.py, we don't want to import _version.py,
-    # so we do it with a regexp instead. This function is not used from
-    # _version.py.
-    keywords = {}
-    try:
-        f = open(versionfile_abs, "r")
-        for line in f.readlines():
-            if line.strip().startswith("git_refnames ="):
-                mo = re.search(r'=\s*"(.*)"', line)
-                if mo:
-                    keywords["refnames"] = mo.group(1)
-            if line.strip().startswith("git_full ="):
-                mo = re.search(r'=\s*"(.*)"', line)
-                if mo:
-                    keywords["full"] = mo.group(1)
-        f.close()
-    except EnvironmentError:
-        pass
-    return keywords
-
-
-@register_vcs_handler("git", "keywords")
-def git_versions_from_keywords(keywords, tag_prefix, verbose):
-    if not keywords:
-        raise NotThisMethod("no keywords at all, weird")
-    refnames = keywords["refnames"].strip()
-    if refnames.startswith("$Format"):
-        if verbose:
-            print("keywords are unexpanded, not using")
-        raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
-    refs = set([r.strip() for r in refnames.strip("()").split(",")])
-    # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
-    # just "foo-1.0". If we see a "tag: " prefix, prefer those.
-    TAG = "tag: "
-    tags = set([r[len(TAG):] for r in refs if r.startswith(TAG)])
-    if not tags:
-        # Either we're using git < 1.8.3, or there really are no tags. We use
-        # a heuristic: assume all version tags have a digit. The old git %%d
-        # expansion behaves like git log --decorate=short and strips out the
-        # refs/heads/ and refs/tags/ prefixes that would let us distinguish
-        # between branches and tags. By ignoring refnames without digits, we
-        # filter out many common branch names like "release" and
-        # "stabilization", as well as "HEAD" and "master".
-        tags = set([r for r in refs if re.search(r'\d', r)])
-        if verbose:
-            print("discarding '%%s', no digits" %% ",".join(refs-tags))
-    if verbose:
-        print("likely tags: %%s" %% ",".join(sorted(tags)))
-    for ref in sorted(tags):
-        # sorting will prefer e.g. "2.0" over "2.0rc1"
-        if ref.startswith(tag_prefix):
-            r = ref[len(tag_prefix):]
-            if verbose:
-                print("picking %%s" %% r)
-            return {"version": r,
-                    "full-revisionid": keywords["full"].strip(),
-                    "dirty": False, "error": None
-                    }
-    # no suitable tags, so version is "0+unknown", but full hex is still there
-    if verbose:
-        print("no suitable tags, using unknown + full revision id")
-    return {"version": "0+unknown",
-            "full-revisionid": keywords["full"].strip(),
-            "dirty": False, "error": "no suitable tags"}
-
-
-@register_vcs_handler("git", "pieces_from_vcs")
-def git_pieces_from_vcs(tag_prefix, root, verbose, run_command=run_command):
-    # this runs 'git' from the root of the source tree. This only gets called
-    # if the git-archive 'subst' keywords were *not* expanded, and
-    # _version.py hasn't already been rewritten with a short version string,
-    # meaning we're inside a checked out source tree.
-
-    if not os.path.exists(os.path.join(root, ".git")):
-        if verbose:
-            print("no .git in %%s" %% root)
-        raise NotThisMethod("no .git directory")
-
-    GITS = ["git"]
-    if sys.platform == "win32":
-        GITS = ["git.cmd", "git.exe"]
-    # if there is a tag, this yields TAG-NUM-gHEX[-dirty]
-    # if there are no tags, this yields HEX[-dirty] (no NUM)
-    describe_out = run_command(GITS, ["describe", "--tags", "--dirty",
-                                      "--always", "--long"],
-                               cwd=root)
-    # --long was added in git-1.5.5
-    if describe_out is None:
-        raise NotThisMethod("'git describe' failed")
-    describe_out = describe_out.strip()
-    full_out = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
-    if full_out is None:
-        raise NotThisMethod("'git rev-parse' failed")
-    full_out = full_out.strip()
-
-    pieces = {}
-    pieces["long"] = full_out
-    pieces["short"] = full_out[:7]  # maybe improved later
-    pieces["error"] = None
-
-    # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
-    # TAG might have hyphens.
-    git_describe = describe_out
-
-    # look for -dirty suffix
-    dirty = git_describe.endswith("-dirty")
-    pieces["dirty"] = dirty
-    if dirty:
-        git_describe = git_describe[:git_describe.rindex("-dirty")]
-
-    # now we have TAG-NUM-gHEX or HEX
-
-    if "-" in git_describe:
-        # TAG-NUM-gHEX
-        mo = re.search(r'^(.+)-(\d+)-g([0-9a-f]+)$', git_describe)
-        if not mo:
-            # unparseable. Maybe git-describe is misbehaving?
-            pieces["error"] = ("unable to parse git-describe output: '%%s'"
-                               %% describe_out)
-            return pieces
-
-        # tag
-        full_tag = mo.group(1)
-        if not full_tag.startswith(tag_prefix):
-            if verbose:
-                fmt = "tag '%%s' doesn't start with prefix '%%s'"
-                print(fmt %% (full_tag, tag_prefix))
-            pieces["error"] = ("tag '%%s' doesn't start with prefix '%%s'"
-                               %% (full_tag, tag_prefix))
-            return pieces
-        pieces["closest-tag"] = full_tag[len(tag_prefix):]
-
-        # distance: number of commits since tag
-        pieces["distance"] = int(mo.group(2))
-
-        # commit: short hex revision ID
-        pieces["short"] = mo.group(3)
-
-    else:
-        # HEX: no tags
-        pieces["closest-tag"] = None
-        count_out = run_command(GITS, ["rev-list", "HEAD", "--count"],
-                                cwd=root)
-        pieces["distance"] = int(count_out)  # total number of commits
-
-    return pieces
-
-
-def plus_or_dot(pieces):
-    if "+" in pieces.get("closest-tag", ""):
-        return "."
-    return "+"
-
-
-def render_pep440(pieces):
-    # now build up version string, with post-release "local version
-    # identifier". Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
-    # get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty
-
-    # exceptions:
-    # 1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += plus_or_dot(pieces)
-            rendered += "%%d.g%%s" %% (pieces["distance"], pieces["short"])
-            if pieces["dirty"]:
-                rendered += ".dirty"
-    else:
-        # exception #1
-        rendered = "0+untagged.%%d.g%%s" %% (pieces["distance"],
-                                          pieces["short"])
-        if pieces["dirty"]:
-            rendered += ".dirty"
-    return rendered
-
-
-def render_pep440_pre(pieces):
-    # TAG[.post.devDISTANCE] . No -dirty
-
-    # exceptions:
-    # 1: no tags. 0.post.devDISTANCE
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"]:
-            rendered += ".post.dev%%d" %% pieces["distance"]
-    else:
-        # exception #1
-        rendered = "0.post.dev%%d" %% pieces["distance"]
-    return rendered
-
-
-def render_pep440_post(pieces):
-    # TAG[.postDISTANCE[.dev0]+gHEX] . The ".dev0" means dirty. Note that
-    # .dev0 sorts backwards (a dirty tree will appear "older" than the
-    # corresponding clean one), but you shouldn't be releasing software with
-    # -dirty anyways.
-
-    # exceptions:
-    # 1: no tags. 0.postDISTANCE[.dev0]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += ".post%%d" %% pieces["distance"]
-            if pieces["dirty"]:
-                rendered += ".dev0"
-            rendered += plus_or_dot(pieces)
-            rendered += "g%%s" %% pieces["short"]
-    else:
-        # exception #1
-        rendered = "0.post%%d" %% pieces["distance"]
-        if pieces["dirty"]:
-            rendered += ".dev0"
-        rendered += "+g%%s" %% pieces["short"]
-    return rendered
-
-
-def render_pep440_old(pieces):
-    # TAG[.postDISTANCE[.dev0]] . The ".dev0" means dirty.
-
-    # exceptions:
-    # 1: no tags. 0.postDISTANCE[.dev0]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += ".post%%d" %% pieces["distance"]
-            if pieces["dirty"]:
-                rendered += ".dev0"
-    else:
-        # exception #1
-        rendered = "0.post%%d" %% pieces["distance"]
-        if pieces["dirty"]:
-            rendered += ".dev0"
-    return rendered
-
-
-def render_git_describe(pieces):
-    # TAG[-DISTANCE-gHEX][-dirty], like 'git describe --tags --dirty
-    # --always'
-
-    # exceptions:
-    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"]:
-            rendered += "-%%d-g%%s" %% (pieces["distance"], pieces["short"])
-    else:
-        # exception #1
-        rendered = pieces["short"]
-    if pieces["dirty"]:
-        rendered += "-dirty"
-    return rendered
-
-
-def render_git_describe_long(pieces):
-    # TAG-DISTANCE-gHEX[-dirty], like 'git describe --tags --dirty
-    # --always -long'. The distance/hash is unconditional.
-
-    # exceptions:
-    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        rendered += "-%%d-g%%s" %% (pieces["distance"], pieces["short"])
-    else:
-        # exception #1
-        rendered = pieces["short"]
-    if pieces["dirty"]:
-        rendered += "-dirty"
-    return rendered
-
-
-def render(pieces, style):
-    if pieces["error"]:
-        return {"version": "unknown",
-                "full-revisionid": pieces.get("long"),
-                "dirty": None,
-                "error": pieces["error"]}
-
-    if not style or style == "default":
-        style = "pep440"  # the default
-
-    if style == "pep440":
-        rendered = render_pep440(pieces)
-    elif style == "pep440-pre":
-        rendered = render_pep440_pre(pieces)
-    elif style == "pep440-post":
-        rendered = render_pep440_post(pieces)
-    elif style == "pep440-old":
-        rendered = render_pep440_old(pieces)
-    elif style == "git-describe":
-        rendered = render_git_describe(pieces)
-    elif style == "git-describe-long":
-        rendered = render_git_describe_long(pieces)
-    else:
-        raise ValueError("unknown style '%%s'" %% style)
-
-    return {"version": rendered, "full-revisionid": pieces["long"],
-            "dirty": pieces["dirty"], "error": None}
-
-
-def get_versions():
-    # I am in _version.py, which lives at ROOT/VERSIONFILE_SOURCE. If we have
-    # __file__, we can work backwards from there to the root. Some
-    # py2exe/bbfreeze/non-CPython implementations don't do __file__, in which
-    # case we can only use expanded keywords.
-
-    cfg = get_config()
-    verbose = cfg.verbose
-
-    try:
-        return git_versions_from_keywords(get_keywords(), cfg.tag_prefix,
-                                          verbose)
-    except NotThisMethod:
-        pass
-
-    try:
-        root = os.path.realpath(__file__)
-        # versionfile_source is the relative path from the top of the source
-        # tree (where the .git directory might live) to this file. Invert
-        # this to find the root from __file__.
-        for i in cfg.versionfile_source.split('/'):
-            root = os.path.dirname(root)
-    except NameError:
-        return {"version": "0+unknown", "full-revisionid": None,
-                "dirty": None,
-                "error": "unable to find root of source tree"}
-
-    try:
-        pieces = git_pieces_from_vcs(cfg.tag_prefix, root, verbose)
-        return render(pieces, cfg.style)
-    except NotThisMethod:
-        pass
-
-    try:
-        if cfg.parentdir_prefix:
-            return versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
-    except NotThisMethod:
-        pass
-
-    return {"version": "0+unknown", "full-revisionid": None,
-            "dirty": None,
-            "error": "unable to compute version"}
-"""
-
-
-@register_vcs_handler("git", "get_keywords")
-def git_get_keywords(versionfile_abs):
-    # the code embedded in _version.py can just fetch the value of these
-    # keywords. When used from setup.py, we don't want to import _version.py,
-    # so we do it with a regexp instead. This function is not used from
-    # _version.py.
-    keywords = {}
-    try:
-        f = open(versionfile_abs, "r")
-        for line in f.readlines():
-            if line.strip().startswith("git_refnames ="):
-                mo = re.search(r'=\s*"(.*)"', line)
-                if mo:
-                    keywords["refnames"] = mo.group(1)
-            if line.strip().startswith("git_full ="):
-                mo = re.search(r'=\s*"(.*)"', line)
-                if mo:
-                    keywords["full"] = mo.group(1)
-        f.close()
-    except EnvironmentError:
-        pass
-    return keywords
-
-
-@register_vcs_handler("git", "keywords")
-def git_versions_from_keywords(keywords, tag_prefix, verbose):
-    if not keywords:
-        raise NotThisMethod("no keywords at all, weird")
-    refnames = keywords["refnames"].strip()
-    if refnames.startswith("$Format"):
-        if verbose:
-            print("keywords are unexpanded, not using")
-        raise NotThisMethod("unexpanded keywords, not a git-archive tarball")
-    refs = set([r.strip() for r in refnames.strip("()").split(",")])
-    # starting in git-1.8.3, tags are listed as "tag: foo-1.0" instead of
-    # just "foo-1.0". If we see a "tag: " prefix, prefer those.
-    TAG = "tag: "
-    tags = set([r[len(TAG) :] for r in refs if r.startswith(TAG)])
-    if not tags:
-        # Either we're using git < 1.8.3, or there really are no tags. We use
-        # a heuristic: assume all version tags have a digit. The old git %d
-        # expansion behaves like git log --decorate=short and strips out the
-        # refs/heads/ and refs/tags/ prefixes that would let us distinguish
-        # between branches and tags. By ignoring refnames without digits, we
-        # filter out many common branch names like "release" and
-        # "stabilization", as well as "HEAD" and "master".
-        tags = set([r for r in refs if re.search(r"\d", r)])
-        if verbose:
-            print("discarding '%s', no digits" % ",".join(refs - tags))
-    if verbose:
-        print("likely tags: %s" % ",".join(sorted(tags)))
-    for ref in sorted(tags):
-        # sorting will prefer e.g. "2.0" over "2.0rc1"
-        if ref.startswith(tag_prefix):
-            r = ref[len(tag_prefix) :]
-            if verbose:
-                print("picking %s" % r)
-            return {
-                "version": r,
-                "full-revisionid": keywords["full"].strip(),
-                "dirty": False,
-                "error": None,
-            }
-    # no suitable tags, so version is "0+unknown", but full hex is still there
-    if verbose:
-        print("no suitable tags, using unknown + full revision id")
-    return {
-        "version": "0+unknown",
-        "full-revisionid": keywords["full"].strip(),
-        "dirty": False,
-        "error": "no suitable tags",
-    }
-
-
-@register_vcs_handler("git", "pieces_from_vcs")
-def git_pieces_from_vcs(tag_prefix, root, verbose, run_command=run_command):
-    # this runs 'git' from the root of the source tree. This only gets called
-    # if the git-archive 'subst' keywords were *not* expanded, and
-    # _version.py hasn't already been rewritten with a short version string,
-    # meaning we're inside a checked out source tree.
-
-    if not os.path.exists(os.path.join(root, ".git")):
-        if verbose:
-            print("no .git in %s" % root)
-        raise NotThisMethod("no .git directory")
-
-    GITS = ["git"]
-    if sys.platform == "win32":
-        GITS = ["git.cmd", "git.exe"]
-    # if there is a tag, this yields TAG-NUM-gHEX[-dirty]
-    # if there are no tags, this yields HEX[-dirty] (no NUM)
-    describe_out = run_command(
-        GITS, ["describe", "--tags", "--dirty", "--always", "--long"], cwd=root
-    )
-    # --long was added in git-1.5.5
-    if describe_out is None:
-        raise NotThisMethod("'git describe' failed")
-    describe_out = describe_out.strip()
-    full_out = run_command(GITS, ["rev-parse", "HEAD"], cwd=root)
-    if full_out is None:
-        raise NotThisMethod("'git rev-parse' failed")
-    full_out = full_out.strip()
-
-    pieces = {}
-    pieces["long"] = full_out
-    pieces["short"] = full_out[:7]  # maybe improved later
-    pieces["error"] = None
-
-    # parse describe_out. It will be like TAG-NUM-gHEX[-dirty] or HEX[-dirty]
-    # TAG might have hyphens.
-    git_describe = describe_out
-
-    # look for -dirty suffix
-    dirty = git_describe.endswith("-dirty")
-    pieces["dirty"] = dirty
-    if dirty:
-        git_describe = git_describe[: git_describe.rindex("-dirty")]
-
-    # now we have TAG-NUM-gHEX or HEX
-
-    if "-" in git_describe:
-        # TAG-NUM-gHEX
-        mo = re.search(r"^(.+)-(\d+)-g([0-9a-f]+)$", git_describe)
-        if not mo:
-            # unparseable. Maybe git-describe is misbehaving?
-            pieces["error"] = "unable to parse git-describe output: '%s'" % describe_out
-            return pieces
-
-        # tag
-        full_tag = mo.group(1)
-        if not full_tag.startswith(tag_prefix):
-            if verbose:
-                fmt = "tag '%s' doesn't start with prefix '%s'"
-                print(fmt % (full_tag, tag_prefix))
-            pieces["error"] = "tag '%s' doesn't start with prefix '%s'" % (
-                full_tag,
-                tag_prefix,
-            )
-            return pieces
-        pieces["closest-tag"] = full_tag[len(tag_prefix) :]
-
-        # distance: number of commits since tag
-        pieces["distance"] = int(mo.group(2))
-
-        # commit: short hex revision ID
-        pieces["short"] = mo.group(3)
-
-    else:
-        # HEX: no tags
-        pieces["closest-tag"] = None
-        count_out = run_command(GITS, ["rev-list", "HEAD", "--count"], cwd=root)
-        pieces["distance"] = int(count_out)  # total number of commits
-
-    return pieces
-
-
-def do_vcs_install(manifest_in, versionfile_source, ipy):
-    GITS = ["git"]
-    if sys.platform == "win32":
-        GITS = ["git.cmd", "git.exe"]
-    files = [manifest_in, versionfile_source]
-    if ipy:
-        files.append(ipy)
-    try:
-        me = __file__
-        if me.endswith(".pyc") or me.endswith(".pyo"):
-            me = os.path.splitext(me)[0] + ".py"
-        versioneer_file = os.path.relpath(me)
-    except NameError:
-        versioneer_file = "versioneer.py"
-    files.append(versioneer_file)
-    present = False
-    try:
-        f = open(".gitattributes", "r")
-        for line in f.readlines():
-            if line.strip().startswith(versionfile_source):
-                if "export-subst" in line.strip().split()[1:]:
-                    present = True
-        f.close()
-    except EnvironmentError:
-        pass
-    if not present:
-        f = open(".gitattributes", "a+")
-        f.write("%s export-subst\n" % versionfile_source)
-        f.close()
-        files.append(".gitattributes")
-    run_command(GITS, ["add", "--"] + files)
-
-
-def versions_from_parentdir(parentdir_prefix, root, verbose):
-    # Source tarballs conventionally unpack into a directory that includes
-    # both the project name and a version string.
-    dirname = os.path.basename(root)
-    if not dirname.startswith(parentdir_prefix):
-        if verbose:
-            print(
-                "guessing rootdir is '%s', but '%s' doesn't start with "
-                "prefix '%s'" % (root, dirname, parentdir_prefix)
-            )
-        raise NotThisMethod("rootdir doesn't start with parentdir_prefix")
-    return {
-        "version": dirname[len(parentdir_prefix) :],
-        "full-revisionid": None,
-        "dirty": False,
-        "error": None,
-    }
-
-
-SHORT_VERSION_PY = """
-# This file was generated by 'versioneer.py' (0.15) from
-# revision-control system data, or from the parent directory name of an
-# unpacked source archive. Distribution tarballs contain a pre-generated copy
-# of this file.
-
-import json
-import sys
-
-version_json = '''
-%s
-'''  # END VERSION_JSON
-
-
-def get_versions():
-    return json.loads(version_json)
-"""
-
-
-def versions_from_file(filename):
-    try:
-        with open(filename) as f:
-            contents = f.read()
-    except EnvironmentError:
-        raise NotThisMethod("unable to read _version.py")
-    mo = re.search(
-        r"version_json = '''\n(.*)'''  # END VERSION_JSON", contents, re.M | re.S
-    )
-    if not mo:
-        raise NotThisMethod("no version_json in _version.py")
-    return json.loads(mo.group(1))
-
-
-def write_to_version_file(filename, versions):
-    os.unlink(filename)
-    contents = json.dumps(versions, sort_keys=True, indent=1, separators=(",", ": "))
-    with open(filename, "w") as f:
-        f.write(SHORT_VERSION_PY % contents)
-
-    print("set %s to '%s'" % (filename, versions["version"]))
-
-
-def plus_or_dot(pieces):
-    if "+" in pieces.get("closest-tag", ""):
-        return "."
-    return "+"
-
-
-def render_pep440(pieces):
-    # now build up version string, with post-release "local version
-    # identifier". Our goal: TAG[+DISTANCE.gHEX[.dirty]] . Note that if you
-    # get a tagged build and then dirty it, you'll get TAG+0.gHEX.dirty
-
-    # exceptions:
-    # 1: no tags. git_describe was just HEX. 0+untagged.DISTANCE.gHEX[.dirty]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += plus_or_dot(pieces)
-            rendered += "%d.g%s" % (pieces["distance"], pieces["short"])
-            if pieces["dirty"]:
-                rendered += ".dirty"
-    else:
-        # exception #1
-        rendered = "0+untagged.%d.g%s" % (pieces["distance"], pieces["short"])
-        if pieces["dirty"]:
-            rendered += ".dirty"
-    return rendered
-
-
-def render_pep440_pre(pieces):
-    # TAG[.post.devDISTANCE] . No -dirty
-
-    # exceptions:
-    # 1: no tags. 0.post.devDISTANCE
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"]:
-            rendered += ".post.dev%d" % pieces["distance"]
-    else:
-        # exception #1
-        rendered = "0.post.dev%d" % pieces["distance"]
-    return rendered
-
-
-def render_pep440_post(pieces):
-    # TAG[.postDISTANCE[.dev0]+gHEX] . The ".dev0" means dirty. Note that
-    # .dev0 sorts backwards (a dirty tree will appear "older" than the
-    # corresponding clean one), but you shouldn't be releasing software with
-    # -dirty anyways.
-
-    # exceptions:
-    # 1: no tags. 0.postDISTANCE[.dev0]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += ".post%d" % pieces["distance"]
-            if pieces["dirty"]:
-                rendered += ".dev0"
-            rendered += plus_or_dot(pieces)
-            rendered += "g%s" % pieces["short"]
-    else:
-        # exception #1
-        rendered = "0.post%d" % pieces["distance"]
-        if pieces["dirty"]:
-            rendered += ".dev0"
-        rendered += "+g%s" % pieces["short"]
-    return rendered
-
-
-def render_pep440_old(pieces):
-    # TAG[.postDISTANCE[.dev0]] . The ".dev0" means dirty.
-
-    # exceptions:
-    # 1: no tags. 0.postDISTANCE[.dev0]
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"] or pieces["dirty"]:
-            rendered += ".post%d" % pieces["distance"]
-            if pieces["dirty"]:
-                rendered += ".dev0"
-    else:
-        # exception #1
-        rendered = "0.post%d" % pieces["distance"]
-        if pieces["dirty"]:
-            rendered += ".dev0"
-    return rendered
-
-
-def render_git_describe(pieces):
-    # TAG[-DISTANCE-gHEX][-dirty], like 'git describe --tags --dirty
-    # --always'
-
-    # exceptions:
-    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        if pieces["distance"]:
-            rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
-    else:
-        # exception #1
-        rendered = pieces["short"]
-    if pieces["dirty"]:
-        rendered += "-dirty"
-    return rendered
-
-
-def render_git_describe_long(pieces):
-    # TAG-DISTANCE-gHEX[-dirty], like 'git describe --tags --dirty
-    # --always -long'. The distance/hash is unconditional.
-
-    # exceptions:
-    # 1: no tags. HEX[-dirty]  (note: no 'g' prefix)
-
-    if pieces["closest-tag"]:
-        rendered = pieces["closest-tag"]
-        rendered += "-%d-g%s" % (pieces["distance"], pieces["short"])
-    else:
-        # exception #1
-        rendered = pieces["short"]
-    if pieces["dirty"]:
-        rendered += "-dirty"
-    return rendered
-
-
-def render(pieces, style):
-    if pieces["error"]:
-        return {
-            "version": "unknown",
-            "full-revisionid": pieces.get("long"),
-            "dirty": None,
-            "error": pieces["error"],
-        }
-
-    if not style or style == "default":
-        style = "pep440"  # the default
-
-    if style == "pep440":
-        rendered = render_pep440(pieces)
-    elif style == "pep440-pre":
-        rendered = render_pep440_pre(pieces)
-    elif style == "pep440-post":
-        rendered = render_pep440_post(pieces)
-    elif style == "pep440-old":
-        rendered = render_pep440_old(pieces)
-    elif style == "git-describe":
-        rendered = render_git_describe(pieces)
-    elif style == "git-describe-long":
-        rendered = render_git_describe_long(pieces)
-    else:
-        raise ValueError("unknown style '%s'" % style)
-
-    return {
-        "version": rendered,
-        "full-revisionid": pieces["long"],
-        "dirty": pieces["dirty"],
-        "error": None,
-    }
-
-
-class VersioneerBadRootError(Exception):
-    pass
-
-
-def get_versions(verbose=False):
-    # returns dict with two keys: 'version' and 'full'
-
-    if "versioneer" in sys.modules:
-        # see the discussion in cmdclass.py:get_cmdclass()
-        del sys.modules["versioneer"]
-
-    root = get_root()
-    cfg = get_config_from_root(root)
-
-    assert cfg.VCS is not None, "please set [versioneer]VCS= in setup.cfg"
-    handlers = HANDLERS.get(cfg.VCS)
-    assert handlers, "unrecognized VCS '%s'" % cfg.VCS
-    verbose = verbose or cfg.verbose
-    assert (
-        cfg.versionfile_source is not None
-    ), "please set versioneer.versionfile_source"
-    assert cfg.tag_prefix is not None, "please set versioneer.tag_prefix"
-
-    versionfile_abs = os.path.join(root, cfg.versionfile_source)
-
-    # extract version from first of: _version.py, VCS command (e.g. 'git
-    # describe'), parentdir. This is meant to work for developers using a
-    # source checkout, for users of a tarball created by 'setup.py sdist',
-    # and for users of a tarball/zipball created by 'git archive' or github's
-    # download-from-tag feature or the equivalent in other VCSes.
-
-    get_keywords_f = handlers.get("get_keywords")
-    from_keywords_f = handlers.get("keywords")
-    if get_keywords_f and from_keywords_f:
-        try:
-            keywords = get_keywords_f(versionfile_abs)
-            ver = from_keywords_f(keywords, cfg.tag_prefix, verbose)
-            if verbose:
-                print("got version from expanded keyword %s" % ver)
-            return ver
-        except NotThisMethod:
-            pass
-
-    try:
-        ver = versions_from_file(versionfile_abs)
-        if verbose:
-            print("got version from file %s %s" % (versionfile_abs, ver))
-        return ver
-    except NotThisMethod:
-        pass
-
-    from_vcs_f = handlers.get("pieces_from_vcs")
-    if from_vcs_f:
-        try:
-            pieces = from_vcs_f(cfg.tag_prefix, root, verbose)
-            ver = render(pieces, cfg.style)
-            if verbose:
-                print("got version from VCS %s" % ver)
-            return ver
-        except NotThisMethod:
-            pass
-
-    try:
-        if cfg.parentdir_prefix:
-            ver = versions_from_parentdir(cfg.parentdir_prefix, root, verbose)
-            if verbose:
-                print("got version from parentdir %s" % ver)
-            return ver
-    except NotThisMethod:
-        pass
-
-    if verbose:
-        print("unable to compute version")
-
-    return {
-        "version": "0+unknown",
-        "full-revisionid": None,
-        "dirty": None,
-        "error": "unable to compute version",
-    }
-
-
-def get_version():
-    return get_versions()["version"]
-
-
-def get_cmdclass():
-    if "versioneer" in sys.modules:
-        del sys.modules["versioneer"]
-        # this fixes the "python setup.py develop" case (also 'install' and
-        # 'easy_install .'), in which subdependencies of the main project are
-        # built (using setup.py bdist_egg) in the same python process. Assume
-        # a main project A and a dependency B, which use different versions
-        # of Versioneer. A's setup.py imports A's Versioneer, leaving it in
-        # sys.modules by the time B's setup.py is executed, causing B to run
-        # with the wrong versioneer. Setuptools wraps the sub-dep builds in a
-        # sandbox that restores sys.modules to it's pre-build state, so the
-        # parent is protected against the child's "import versioneer". By
-        # removing ourselves from sys.modules here, before the child build
-        # happens, we protect the child from the parent's versioneer too.
-        # Also see https://github.com/warner/python-versioneer/issues/52
-
-    cmds = {}
-
-    # we add "version" to both distutils and setuptools
-    from distutils.core import Command
-
-    class cmd_version(Command):
-        description = "report generated version string"
-        user_options = []
-        boolean_options = []
-
-        def initialize_options(self):
-            pass
-
-        def finalize_options(self):
-            pass
-
-        def run(self):
-            vers = get_versions(verbose=True)
-            print("Version: %s" % vers["version"])
-            print(" full-revisionid: %s" % vers.get("full-revisionid"))
-            print(" dirty: %s" % vers.get("dirty"))
-            if vers["error"]:
-                print(" error: %s" % vers["error"])
-
-    cmds["version"] = cmd_version
-
-    # we override "build_py" in both distutils and setuptools
-    #
-    # most invocation pathways end up running build_py:
-    #  distutils/build -> build_py
-    #  distutils/install -> distutils/build ->..
-    #  setuptools/bdist_wheel -> distutils/install ->..
-    #  setuptools/bdist_egg -> distutils/install_lib -> build_py
-    #  setuptools/install -> bdist_egg ->..
-    #  setuptools/develop -> ?
-
-    from distutils.command.build_py import build_py as _build_py
-
-    class cmd_build_py(_build_py):
-        def run(self):
-            root = get_root()
-            cfg = get_config_from_root(root)
-            versions = get_versions()
-            _build_py.run(self)
-            # now locate _version.py in the new build/ directory and replace
-            # it with an updated value
-            if cfg.versionfile_build:
-                target_versionfile = os.path.join(self.build_lib, cfg.versionfile_build)
-                print("UPDATING %s" % target_versionfile)
-                write_to_version_file(target_versionfile, versions)
-
-    cmds["build_py"] = cmd_build_py
-
-    if "cx_Freeze" in sys.modules:  # cx_freeze enabled?
-        from cx_Freeze.dist import build_exe as _build_exe
-
-        class cmd_build_exe(_build_exe):
-            def run(self):
-                root = get_root()
-                cfg = get_config_from_root(root)
-                versions = get_versions()
-                target_versionfile = cfg.versionfile_source
-                print("UPDATING %s" % target_versionfile)
-                write_to_version_file(target_versionfile, versions)
-
-                _build_exe.run(self)
-                os.unlink(target_versionfile)
-                with open(cfg.versionfile_source, "w") as f:
-                    LONG = LONG_VERSION_PY[cfg.VCS]
-                    f.write(
-                        LONG
-                        % {
-                            "DOLLAR": "$",
-                            "STYLE": cfg.style,
-                            "TAG_PREFIX": cfg.tag_prefix,
-                            "PARENTDIR_PREFIX": cfg.parentdir_prefix,
-                            "VERSIONFILE_SOURCE": cfg.versionfile_source,
-                        }
-                    )
-
-        cmds["build_exe"] = cmd_build_exe
-        del cmds["build_py"]
-
-    # we override different "sdist" commands for both environments
-    if "setuptools" in sys.modules:
-        from setuptools.command.sdist import sdist as _sdist
-    else:
-        from distutils.command.sdist import sdist as _sdist
-
-    class cmd_sdist(_sdist):
-        def run(self):
-            versions = get_versions()
-            self._versioneer_generated_versions = versions
-            # unless we update this, the command will keep using the old
-            # version
-            self.distribution.metadata.version = versions["version"]
-            return _sdist.run(self)
-
-        def make_release_tree(self, base_dir, files):
-            root = get_root()
-            cfg = get_config_from_root(root)
-            _sdist.make_release_tree(self, base_dir, files)
-            # now locate _version.py in the new base_dir directory
-            # (remembering that it may be a hardlink) and replace it with an
-            # updated value
-            target_versionfile = os.path.join(base_dir, cfg.versionfile_source)
-            print("UPDATING %s" % target_versionfile)
-            write_to_version_file(
-                target_versionfile, self._versioneer_generated_versions
-            )
-
-    cmds["sdist"] = cmd_sdist
-
-    return cmds
-
-
-CONFIG_ERROR = """
-setup.cfg is missing the necessary Versioneer configuration. You need
-a section like:
-
- [versioneer]
- VCS = git
- style = pep440
- versionfile_source = src/myproject/_version.py
- versionfile_build = myproject/_version.py
- tag_prefix = ""
- parentdir_prefix = myproject-
-
-You will also need to edit your setup.py to use the results:
-
- import versioneer
- setup(version=versioneer.get_version(),
-       cmdclass=versioneer.get_cmdclass(), ...)
-
-Please read the docstring in ./versioneer.py for configuration instructions,
-edit setup.cfg, and re-run the installer or 'python versioneer.py setup'.
-"""
-
-SAMPLE_CONFIG = """
-# See the docstring in versioneer.py for instructions. Note that you must
-# re-run 'versioneer.py setup' after changing this section, and commit the
-# resulting files.
-
-[versioneer]
-#VCS = git
-#style = pep440
-#versionfile_source =
-#versionfile_build =
-#tag_prefix =
-#parentdir_prefix =
-
-"""
-
-INIT_PY_SNIPPET = """
-from ._version import get_versions
-__version__ = get_versions()['version']
-del get_versions
-"""
-
-
-def do_setup():
-    root = get_root()
-    try:
-        cfg = get_config_from_root(root)
-    except (
-        EnvironmentError,
-        configparser.NoSectionError,
-        configparser.NoOptionError,
-    ) as e:
-        if isinstance(e, (EnvironmentError, configparser.NoSectionError)):
-            print("Adding sample versioneer config to setup.cfg", file=sys.stderr)
-            with open(os.path.join(root, "setup.cfg"), "a") as f:
-                f.write(SAMPLE_CONFIG)
-        print(CONFIG_ERROR, file=sys.stderr)
-        return 1
-
-    print(" creating %s" % cfg.versionfile_source)
-    with open(cfg.versionfile_source, "w") as f:
-        LONG = LONG_VERSION_PY[cfg.VCS]
-        f.write(
-            LONG
-            % {
-                "DOLLAR": "$",
-                "STYLE": cfg.style,
-                "TAG_PREFIX": cfg.tag_prefix,
-                "PARENTDIR_PREFIX": cfg.parentdir_prefix,
-                "VERSIONFILE_SOURCE": cfg.versionfile_source,
-            }
-        )
-
-    ipy = os.path.join(os.path.dirname(cfg.versionfile_source), "__init__.py")
-    if os.path.exists(ipy):
-        try:
-            with open(ipy, "r") as f:
-                old = f.read()
-        except EnvironmentError:
-            old = ""
-        if INIT_PY_SNIPPET not in old:
-            print(" appending to %s" % ipy)
-            with open(ipy, "a") as f:
-                f.write(INIT_PY_SNIPPET)
-        else:
-            print(" %s unmodified" % ipy)
-    else:
-        print(" %s doesn't exist, ok" % ipy)
-        ipy = None
-
-    # Make sure both the top-level "versioneer.py" and versionfile_source
-    # (PKG/_version.py, used by runtime code) are in MANIFEST.in, so
-    # they'll be copied into source distributions. Pip won't be able to
-    # install the package without this.
-    manifest_in = os.path.join(root, "MANIFEST.in")
-    simple_includes = set()
-    try:
-        with open(manifest_in, "r") as f:
-            for line in f:
-                if line.startswith("include "):
-                    for include in line.split()[1:]:
-                        simple_includes.add(include)
-    except EnvironmentError:
-        pass
-    # That doesn't cover everything MANIFEST.in can do
-    # (http://docs.python.org/2/distutils/sourcedist.html#commands), so
-    # it might give some false negatives. Appending redundant 'include'
-    # lines is safe, though.
-    if "versioneer.py" not in simple_includes:
-        print(" appending 'versioneer.py' to MANIFEST.in")
-        with open(manifest_in, "a") as f:
-            f.write("include versioneer.py\n")
-    else:
-        print(" 'versioneer.py' already in MANIFEST.in")
-    if cfg.versionfile_source not in simple_includes:
-        print(
-            " appending versionfile_source ('%s') to MANIFEST.in"
-            % cfg.versionfile_source
-        )
-        with open(manifest_in, "a") as f:
-            f.write("include %s\n" % cfg.versionfile_source)
-    else:
-        print(" versionfile_source already in MANIFEST.in")
-
-    # Make VCS-specific changes. For git, this means creating/changing
-    # .gitattributes to mark _version.py for export-time keyword
-    # substitution.
-    do_vcs_install(manifest_in, cfg.versionfile_source, ipy)
-    return 0
-
-
-def scan_setup_py():
-    found = set()
-    setters = False
-    errors = 0
-    with open("setup.py", "r") as f:
-        for line in f.readlines():
-            if "import versioneer" in line:
-                found.add("import")
-            if "versioneer.get_cmdclass()" in line:
-                found.add("cmdclass")
-            if "versioneer.get_version()" in line:
-                found.add("get_version")
-            if "versioneer.VCS" in line:
-                setters = True
-            if "versioneer.versionfile_source" in line:
-                setters = True
-    if len(found) != 3:
-        print("")
-        print("Your setup.py appears to be missing some important items")
-        print("(but I might be wrong). Please make sure it has something")
-        print("roughly like the following:")
-        print("")
-        print(" import versioneer")
-        print(" setup( version=versioneer.get_version(),")
-        print("        cmdclass=versioneer.get_cmdclass(),  ...)")
-        print("")
-        errors += 1
-    if setters:
-        print("You should remove lines like 'versioneer.VCS = ' and")
-        print("'versioneer.versionfile_source = ' . This configuration")
-        print("now lives in setup.cfg, and should be removed from setup.py")
-        print("")
-        errors += 1
-    return errors
-
-
-if __name__ == "__main__":
-    cmd = sys.argv[1]
-    if cmd == "setup":
-        errors = do_setup()
-        errors += scan_setup_py()
-        if errors:
-            sys.exit(1)


Test patch:
diff --git a/matplotlib_scalebar/test_dimension.py b/matplotlib_scalebar/test_dimension.py
index 02a51e9..b5d9362 100644
--- a/matplotlib_scalebar/test_dimension.py
+++ b/matplotlib_scalebar/test_dimension.py
@@ -49,9 +49,9 @@ def test_calculate_preferred(dim, value, units, expected_value, expected_units):
     "dim,units,expected",
     [
         (SILengthDimension(), "cm", "cm"),
-        (SILengthDimension(), u"\u00b5m", _LATEX_MU + "m"),
+        (SILengthDimension(), "\u00b5m", _LATEX_MU + "m"),
         (SILengthReciprocalDimension(), "1/cm", "cm$^{-1}$"),
-        (SILengthReciprocalDimension(), u"1/\u00b5m", _LATEX_MU + "m$^{-1}$"),
+        (SILengthReciprocalDimension(), "1/\u00b5m", _LATEX_MU + "m$^{-1}$"),
     ],
 )
 def test_to_latex(dim, units, expected):
diff --git a/matplotlib_scalebar/test_scalebar.py b/matplotlib_scalebar/test_scalebar.py
index 1c38a2e..c0b7ce8 100644
--- a/matplotlib_scalebar/test_scalebar.py
+++ b/matplotlib_scalebar/test_scalebar.py
@@ -5,9 +5,7 @@
 # Third party modules.
 import matplotlib
 
-matplotlib.use("agg")
 import matplotlib.pyplot as plt
-from matplotlib.testing.decorators import cleanup
 from matplotlib.font_manager import FontProperties
 
 import numpy as np
@@ -19,9 +17,9 @@
 
 # Globals and constants variables.
 
+matplotlib.use("agg")
 
 @pytest.fixture
-@cleanup
 def scalebar():
     fig = plt.figure()
     ax = fig.add_subplot(111)
@@ -310,21 +308,3 @@ def test_rotation(scalebar, rotation):
 
     with pytest.raises(ValueError):
         scalebar.set_rotation("h")
-
-
-def test_warnings():
-    with pytest.warns(None) as record:
-        fig = plt.figure()
-        ax = fig.add_subplot(111)
-
-        data = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
-        ax.imshow(data)
-
-        scalebar = ScaleBar(0.5)
-        ax.add_artist(scalebar)
-
-        plt.draw()
-
-    assert len(record) == 0, "Warnings: " + ",".join(
-        f"{repr(w.message)}" for w in record
-    )
diff --git a/requirements-test.txt b/requirements-test.txt
deleted file mode 100644
index 55b033e..0000000
--- a/requirements-test.txt
+++ /dev/null
@@ -1,1 +0,0 @@
-pytest
\ No newline at end of file