Repository: sdss/clu

Issue:
Allow to split send_command
From Florian:

> Maybe you should split the send_command, eg:
> 
>  focus_stage = client.proxy("test.first.focus_stage")
> 
>  focus_stage.send_command("moverelative", -1000, "UM")


Discussion:
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  Lines       1805    1810      +5     
  Branches     279     279             
=======================================
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- Misses        75      79      +4     
- Partials      76      79      +3     
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------

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Patch:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7c41b30..c7b1a2d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 * [#86](https://github.com/sdss/clu/issues/86) `additionalProperties` is set to `false` by default if not specified, including if `schema=None` when initialising an actor.
 
+### 🚀 New
+
+* [#85](https://github.com/sdss/clu/issues/85) Added `BaseClient.proxy()` method.
+
 ### ✨ Improved
 
 * [#90](https://github.com/sdss/clu/issues/90) If an exception object is passed as a keyword in a command or actor message, it will be unpacked into the exception type and message.
diff --git a/poetry.lock b/poetry.lock
index 9ec2c38..e1c41be 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -36,14 +36,6 @@ category = "dev"
 optional = false
 python-versions = "*"
 
-[[package]]
-name = "appdirs"
-version = "1.4.4"
-description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
-category = "dev"
-optional = false
-python-versions = "*"
-
 [[package]]
 name = "appnope"
 version = "0.1.2"
@@ -127,16 +119,31 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "backports.entry-points-selectable"
+version = "1.1.0"
+description = "Compatibility shim providing selectable entry points for older implementations"
+category = "dev"
+optional = false
+python-versions = ">=2.7"
+
+[package.dependencies]
+importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
+
+[package.extras]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=4.6)", "pytest-flake8", "pytest-cov", "pytest-black (>=0.3.7)", "pytest-mypy", "pytest-checkdocs (>=2.4)", "pytest-enabler (>=1.0.1)"]
+
 [[package]]
 name = "beautifulsoup4"
-version = "4.9.3"
+version = "4.10.0"
 description = "Screen-scraping library"
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">3.0.0"
 
 [package.dependencies]
-soupsieve = {version = ">1.2", markers = "python_version >= \"3.0\""}
+soupsieve = ">1.2"
 
 [package.extras]
 html5lib = ["html5lib"]
@@ -144,25 +151,29 @@ lxml = ["lxml"]
 
 [[package]]
 name = "black"
-version = "21.6b0"
+version = "21.9b0"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
 python-versions = ">=3.6.2"
 
 [package.dependencies]
-appdirs = "*"
 click = ">=7.1.2"
 mypy-extensions = ">=0.4.3"
-pathspec = ">=0.8.1,<1"
+pathspec = ">=0.9.0,<1"
+platformdirs = ">=2"
 regex = ">=2020.1.8"
-toml = ">=0.10.1"
+tomli = ">=0.2.6,<2.0.0"
 typed-ast = {version = ">=1.4.2", markers = "python_version < \"3.8\""}
-typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
+typing-extensions = [
+    {version = ">=3.10.0.0", markers = "python_version < \"3.10\""},
+    {version = "!=3.10.0.1", markers = "python_version >= \"3.10\""},
+]
 
 [package.extras]
 colorama = ["colorama (>=0.4.3)"]
 d = ["aiohttp (>=3.6.0)", "aiohttp-cors (>=0.4.0)"]
+jupyter = ["ipython (>=7.8.0)", "tokenize-rt (>=3.2.0)"]
 python2 = ["typed-ast (>=1.4.2)"]
 uvloop = ["uvloop (>=0.15.2)"]
 
@@ -175,12 +186,15 @@ optional = false
 python-versions = "*"
 
 [[package]]
-name = "chardet"
-version = "4.0.0"
-description = "Universal encoding detector for Python 2 and 3"
+name = "charset-normalizer"
+version = "2.0.6"
+description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=3.5.0"
+
+[package.extras]
+unicode_backport = ["unicodedata2"]
 
 [[package]]
 name = "click"
@@ -196,7 +210,7 @@ importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 
 [[package]]
 name = "codecov"
-version = "2.1.11"
+version = "2.1.12"
 description = "Hosted coverage reports for GitHub, Bitbucket and Gitlab"
 category = "dev"
 optional = false
@@ -216,15 +230,18 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "colorlog"
-version = "5.0.1"
+version = "6.4.1"
 description = "Add colours to the output of Python's logging module."
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=3.6"
 
 [package.dependencies]
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
 
+[package.extras]
+development = ["black", "flake8", "mypy", "pytest", "types-colorama"]
+
 [[package]]
 name = "coverage"
 version = "5.5"
@@ -239,9 +256,24 @@ toml = {version = "*", optional = true, markers = "extra == \"toml\""}
 [package.extras]
 toml = ["toml"]
 
+[[package]]
+name = "daemonocle"
+version = "1.2.3"
+description = "A Python library for creating super fancy Unix daemons"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+click = "*"
+psutil = "*"
+
+[package.extras]
+test = ["coveralls", "flake8", "flake8-bugbear", "flake8-isort", "pytest", "pytest-cov"]
+
 [[package]]
 name = "decorator"
-version = "5.0.9"
+version = "5.1.0"
 description = "Decorators for Humans"
 category = "dev"
 optional = false
@@ -257,18 +289,16 @@ python-versions = "*"
 
 [[package]]
 name = "doc8"
-version = "0.8.1"
+version = "0.9.0"
 description = "Style checker for Sphinx (or other) RST documentation"
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=3.6"
 
 [package.dependencies]
-chardet = "*"
 docutils = "*"
 Pygments = "*"
 restructuredtext-lint = ">=0.7"
-six = "*"
 stevedore = "*"
 
 [[package]]
@@ -303,7 +333,7 @@ pyflakes = ">=2.3.0,<2.4.0"
 
 [[package]]
 name = "furo"
-version = "2021.6.18b36"
+version = "2021.9.8"
 description = "A clean customisable Sphinx documentation theme."
 category = "dev"
 optional = false
@@ -311,19 +341,19 @@ python-versions = ">=3.6"
 
 [package.dependencies]
 beautifulsoup4 = "*"
-sphinx = ">=3.0,<5.0"
+sphinx = ">=4.0,<5.0"
 
 [package.extras]
-doc = ["myst-parser", "sphinx-copybutton", "sphinx-inline-tabs", "docutils (!=0.17)"]
+doc = ["myst-parser", "sphinx-copybutton", "sphinx-design", "sphinx-inline-tabs"]
 test = ["pytest", "pytest-cov", "pytest-xdist"]
 
 [[package]]
 name = "idna"
-version = "2.10"
+version = "3.2"
 description = "Internationalized Domain Names in Applications (IDNA)"
 category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.5"
 
 [[package]]
 name = "imagesize"
@@ -335,7 +365,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "importlib-metadata"
-version = "4.5.0"
+version = "4.8.1"
 description = "Read metadata from Python packages"
 category = "main"
 optional = false
@@ -347,7 +377,8 @@ zipp = ">=0.5"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
+perf = ["ipython"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-perf (>=0.9.2)", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
 
 [[package]]
 name = "iniconfig"
@@ -359,7 +390,7 @@ python-versions = "*"
 
 [[package]]
 name = "invoke"
-version = "1.5.0"
+version = "1.6.0"
 description = "Pythonic task execution"
 category = "main"
 optional = false
@@ -380,7 +411,7 @@ toml = {version = ">=0.10.2", markers = "python_version > \"3.6\""}
 
 [[package]]
 name = "ipython"
-version = "7.24.1"
+version = "7.27.0"
 description = "IPython: Productive Interactive Computing"
 category = "dev"
 optional = false
@@ -410,26 +441,19 @@ parallel = ["ipyparallel"]
 qtconsole = ["qtconsole"]
 test = ["nose (>=0.10.1)", "requests", "testpath", "pygments", "nbformat", "ipykernel", "numpy (>=1.17)"]
 
-[[package]]
-name = "ipython-genutils"
-version = "0.2.0"
-description = "Vestigial utilities from IPython"
-category = "dev"
-optional = false
-python-versions = "*"
-
 [[package]]
 name = "isort"
-version = "5.8.0"
+version = "5.9.3"
 description = "A Python utility / library to sort Python imports."
 category = "dev"
 optional = false
-python-versions = ">=3.6,<4.0"
+python-versions = ">=3.6.1,<4.0"
 
 [package.extras]
 pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
 requirements_deprecated_finder = ["pipreqs", "pip-api"]
 colors = ["colorama (>=0.4.3,<0.5.0)"]
+plugins = ["setuptools"]
 
 [[package]]
 name = "jedi"
@@ -520,7 +544,7 @@ python-versions = ">=3.6"
 
 [[package]]
 name = "matplotlib-inline"
-version = "0.1.2"
+version = "0.1.3"
 description = "Inline Matplotlib backend for Jupyter"
 category = "dev"
 optional = false
@@ -585,7 +609,7 @@ python-versions = "*"
 
 [[package]]
 name = "myst-parser"
-version = "0.15.1"
+version = "0.15.2"
 description = "An extended commonmark compliant parser, with bridges to docutils & sphinx."
 category = "dev"
 optional = false
@@ -597,7 +621,7 @@ jinja2 = "*"
 markdown-it-py = ">=1.0.0,<2.0.0"
 mdit-py-plugins = ">=0.2.8,<0.3.0"
 pyyaml = "*"
-sphinx = ">=3,<5"
+sphinx = ">=3.1,<5"
 
 [package.extras]
 code_style = ["pre-commit (>=2.12,<3.0)"]
@@ -660,11 +684,11 @@ testing = ["docopt", "pytest (<6.0.0)"]
 
 [[package]]
 name = "pathspec"
-version = "0.8.1"
+version = "0.9.0"
 description = "Utility library for gitignore style pattern matching of file paths."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 
 [[package]]
 name = "pbr"
@@ -693,19 +717,32 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "platformdirs"
+version = "2.3.0"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+docs = ["Sphinx (>=4)", "furo (>=2021.7.5b38)", "proselint (>=0.10.2)", "sphinx-autodoc-typehints (>=1.12)"]
+test = ["appdirs (==1.4.4)", "pytest (>=6)", "pytest-cov (>=2.7)", "pytest-mock (>=3.6)"]
+
 [[package]]
 name = "pluggy"
-version = "0.13.1"
+version = "1.0.0"
 description = "plugin and hook calling mechanisms for python"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.6"
 
 [package.dependencies]
 importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 
 [package.extras]
 dev = ["pre-commit", "tox"]
+testing = ["pytest", "pytest-benchmark"]
 
 [[package]]
 name = "port-for"
@@ -720,11 +757,11 @@ tests = ["pytest", "pytest-cov", "mock"]
 
 [[package]]
 name = "prompt-toolkit"
-version = "3.0.19"
+version = "3.0.20"
 description = "Library for building powerful interactive command lines in Python"
 category = "main"
 optional = false
-python-versions = ">=3.6.1"
+python-versions = ">=3.6.2"
 
 [package.dependencies]
 wcwidth = "*"
@@ -733,7 +770,7 @@ wcwidth = "*"
 name = "psutil"
 version = "5.8.0"
 description = "Cross-platform lib for process and system monitoring in Python."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
@@ -774,7 +811,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pygments"
-version = "2.9.0"
+version = "2.10.0"
 description = "Pygments is a syntax highlighting package written in Python."
 category = "main"
 optional = false
@@ -790,15 +827,15 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "pyrsistent"
-version = "0.17.3"
+version = "0.18.0"
 description = "Persistent/Functional/Immutable data structures"
 category = "main"
 optional = false
-python-versions = ">=3.5"
+python-versions = ">=3.6"
 
 [[package]]
 name = "pytest"
-version = "6.2.4"
+version = "6.2.5"
 description = "pytest: simple powerful testing with Python"
 category = "dev"
 optional = false
@@ -811,7 +848,7 @@ colorama = {version = "*", markers = "sys_platform == \"win32\""}
 importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 packaging = "*"
-pluggy = ">=0.12,<1.0.0a1"
+pluggy = ">=0.12,<2.0"
 py = ">=1.8.2"
 toml = "*"
 
@@ -921,7 +958,7 @@ pamqp = ">=2,<3"
 
 [[package]]
 name = "regex"
-version = "2021.4.4"
+version = "2021.8.28"
 description = "Alternative regular expression module, to replace re."
 category = "dev"
 optional = false
@@ -929,21 +966,21 @@ python-versions = "*"
 
 [[package]]
 name = "requests"
-version = "2.25.1"
+version = "2.26.0"
 description = "Python HTTP for Humans."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
-chardet = ">=3.0.2,<5"
-idna = ">=2.5,<3"
+charset-normalizer = {version = ">=2.0.0,<2.1.0", markers = "python_version >= \"3\""}
+idna = {version = ">=2.5,<4", markers = "python_version >= \"3\""}
 urllib3 = ">=1.21.1,<1.27"
 
 [package.extras]
-security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
 socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
+use_chardet_on_py3 = ["chardet (>=3.0.2,<5)"]
 
 [[package]]
 name = "restructuredtext-lint"
@@ -969,13 +1006,14 @@ docutils = ">=0.7"
 
 [[package]]
 name = "sdsstools"
-version = "0.4.10"
+version = "0.4.13"
 description = "Small tools for SDSS products"
 category = "main"
 optional = false
 python-versions = ">=3.6,<4.0"
 
 [package.dependencies]
+daemonocle = ">=1.0.2,<2.0.0"
 docutils = ">=0.16,<0.17"
 importlib_metadata = {version = "*", markers = "python_version <= \"3.7\""}
 invoke = ">=1.3.0,<2.0.0"
@@ -1019,7 +1057,7 @@ python-versions = ">=3.6"
 
 [[package]]
 name = "sphinx"
-version = "4.0.2"
+version = "4.2.0"
 description = "Python documentation generator"
 category = "dev"
 optional = false
@@ -1038,14 +1076,14 @@ requests = ">=2.5.0"
 snowballstemmer = ">=1.1"
 sphinxcontrib-applehelp = "*"
 sphinxcontrib-devhelp = "*"
-sphinxcontrib-htmlhelp = "*"
+sphinxcontrib-htmlhelp = ">=2.0.0"
 sphinxcontrib-jsmath = "*"
 sphinxcontrib-qthelp = "*"
-sphinxcontrib-serializinghtml = "*"
+sphinxcontrib-serializinghtml = ">=1.1.5"
 
 [package.extras]
 docs = ["sphinxcontrib-websupport"]
-lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.800)", "docutils-stubs"]
+lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.900)", "docutils-stubs", "types-typed-ast", "types-pkg-resources", "types-requests"]
 test = ["pytest", "pytest-cov", "html5lib", "cython", "typed-ast"]
 
 [[package]]
@@ -1151,7 +1189,7 @@ test = ["pytest"]
 
 [[package]]
 name = "stevedore"
-version = "3.3.0"
+version = "3.4.0"
 description = "Manage dynamic plugins for Python applications"
 category = "dev"
 optional = false
@@ -1177,6 +1215,14 @@ category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[[package]]
+name = "tomli"
+version = "1.2.1"
+description = "A lil' TOML parser"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
 [[package]]
 name = "tornado"
 version = "6.1"
@@ -1187,15 +1233,12 @@ python-versions = ">= 3.5"
 
 [[package]]
 name = "traitlets"
-version = "5.0.5"
+version = "5.1.0"
 description = "Traitlets Python configuration system"
 category = "dev"
 optional = false
 python-versions = ">=3.7"
 
-[package.dependencies]
-ipython-genutils = "*"
-
 [package.extras]
 test = ["pytest"]
 
@@ -1209,7 +1252,7 @@ python-versions = "*"
 
 [[package]]
 name = "typing-extensions"
-version = "3.10.0.0"
+version = "3.10.0.2"
 description = "Backported and Experimental Type Hints for Python 3.5+"
 category = "main"
 optional = false
@@ -1217,7 +1260,7 @@ python-versions = "*"
 
 [[package]]
 name = "urllib3"
-version = "1.26.5"
+version = "1.26.6"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
 category = "dev"
 optional = false
@@ -1230,22 +1273,23 @@ socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
 name = "virtualenv"
-version = "20.4.7"
+version = "20.8.0"
 description = "Virtual Python Environment builder"
 category = "dev"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 
 [package.dependencies]
-appdirs = ">=1.4.3,<2"
+"backports.entry-points-selectable" = ">=1.0.4"
 distlib = ">=0.3.1,<1"
 filelock = ">=3.0.0,<4"
 importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+platformdirs = ">=2,<3"
 six = ">=1.9.0,<2"
 
 [package.extras]
 docs = ["proselint (>=0.10.2)", "sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)"]
-testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
+testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "packaging (>=20.0)"]
 
 [[package]]
 name = "wcwidth"
@@ -1270,7 +1314,7 @@ typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 
 [[package]]
 name = "zipp"
-version = "3.4.1"
+version = "3.5.0"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 category = "main"
 optional = false
@@ -1278,7 +1322,7 @@ python-versions = ">=3.6"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [metadata]
 lock-version = "1.1"
@@ -1298,10 +1342,6 @@ alabaster = [
     {file = "alabaster-0.7.12-py2.py3-none-any.whl", hash = "sha256:446438bdcca0e05bd45ea2de1668c1d9b032e1a9154c2c259092d77031ddd359"},
     {file = "alabaster-0.7.12.tar.gz", hash = "sha256:a661d72d58e6ea8a57f7a86e37d86716863ee5e92788398526d58b26a4e4dc02"},
 ]
-appdirs = [
-    {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
-    {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
-]
 appnope = [
     {file = "appnope-0.1.2-py2.py3-none-any.whl", hash = "sha256:93aa393e9d6c54c5cd570ccadd8edad61ea0c4b9ea7a01409020c9aa019eb442"},
     {file = "appnope-0.1.2.tar.gz", hash = "sha256:dd83cd4b5b460958838f6eb3000c660b1f9caf2a5b1de4264e941512f603258a"},
@@ -1334,39 +1374,42 @@ backcall = [
     {file = "backcall-0.2.0-py2.py3-none-any.whl", hash = "sha256:fbbce6a29f263178a1f7915c1940bde0ec2b2a967566fe1c65c1dfb7422bd255"},
     {file = "backcall-0.2.0.tar.gz", hash = "sha256:5cbdbf27be5e7cfadb448baf0aa95508f91f2bbc6c6437cd9cd06e2a4c215e1e"},
 ]
+"backports.entry-points-selectable" = [
+    {file = "backports.entry_points_selectable-1.1.0-py2.py3-none-any.whl", hash = "sha256:a6d9a871cde5e15b4c4a53e3d43ba890cc6861ec1332c9c2428c92f977192acc"},
+    {file = "backports.entry_points_selectable-1.1.0.tar.gz", hash = "sha256:988468260ec1c196dab6ae1149260e2f5472c9110334e5d51adcb77867361f6a"},
+]
 beautifulsoup4 = [
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-    {file = "beautifulsoup4-4.9.3-py3-none-any.whl", hash = "sha256:fff47e031e34ec82bf17e00da8f592fe7de69aeea38be00523c04623c04fb666"},
-    {file = "beautifulsoup4-4.9.3.tar.gz", hash = "sha256:84729e322ad1d5b4d25f805bfa05b902dd96450f43842c4e99067d5e1369eb25"},
+    {file = "beautifulsoup4-4.10.0-py3-none-any.whl", hash = "sha256:9a315ce70049920ea4572a4055bc4bd700c940521d36fc858205ad4fcde149bf"},
+    {file = "beautifulsoup4-4.10.0.tar.gz", hash = "sha256:c23ad23c521d818955a4151a67d81580319d4bf548d3d49f4223ae041ff98891"},
 ]
 black = [
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-    {file = "black-21.6b0.tar.gz", hash = "sha256:dc132348a88d103016726fe360cb9ede02cecf99b76e3660ce6c596be132ce04"},
+    {file = "black-21.9b0-py3-none-any.whl", hash = "sha256:380f1b5da05e5a1429225676655dddb96f5ae8c75bdf91e53d798871b902a115"},
+    {file = "black-21.9b0.tar.gz", hash = "sha256:7de4cfc7eb6b710de325712d40125689101d21d25283eed7e9998722cf10eb91"},
 ]
 certifi = [
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     {file = "certifi-2021.5.30.tar.gz", hash = "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee"},
 ]
-chardet = [
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-    {file = "chardet-4.0.0.tar.gz", hash = "sha256:0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa"},
+charset-normalizer = [
+    {file = "charset-normalizer-2.0.6.tar.gz", hash = "sha256:5ec46d183433dcbd0ab716f2d7f29d8dee50505b3fdb40c6b985c7c4f5a3591f"},
+    {file = "charset_normalizer-2.0.6-py3-none-any.whl", hash = "sha256:5d209c0a931f215cee683b6445e2d77677e7e75e159f78def0db09d68fafcaa6"},
 ]
 click = [
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     {file = "click-8.0.1.tar.gz", hash = "sha256:8c04c11192119b1ef78ea049e0a6f0463e4c48ef00a30160c704337586f3ad7a"},
 ]
 codecov = [
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-    {file = "codecov-2.1.11-py3.8.egg", hash = "sha256:e95901d4350e99fc39c8353efa450050d2446c55bac91d90fcfd2354e19a6aef"},
-    {file = "codecov-2.1.11.tar.gz", hash = "sha256:6cde272454009d27355f9434f4e49f238c0273b216beda8472a65dc4957f473b"},
+    {file = "codecov-2.1.12-py2.py3-none-any.whl", hash = "sha256:585dc217dc3d8185198ceb402f85d5cb5dbfa0c5f350a5abcdf9e347776a5b47"},
+    {file = "codecov-2.1.12-py3.8.egg", hash = "sha256:782a8e5352f22593cbc5427a35320b99490eb24d9dcfa2155fd99d2b75cfb635"},
+    {file = "codecov-2.1.12.tar.gz", hash = "sha256:a0da46bb5025426da895af90938def8ee12d37fcbcbbbc15b6dc64cf7ebc51c1"},
 ]
 colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
 ]
 colorlog = [
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-    {file = "colorlog-5.0.1.tar.gz", hash = "sha256:f17c013a06962b02f4449ee07cfdbe6b287df29efc2c9a1515b4a376f4e588ea"},
+    {file = "colorlog-6.4.1-py2.py3-none-any.whl", hash = "sha256:b13da382156711f7973bf7cbd1f40ea544aff51fde5dc3fb8f3fa602c321d645"},
+    {file = "colorlog-6.4.1.tar.gz", hash = "sha256:af99440154a01f27c09256760ea3477982bf782721feaa345904e806879df4d8"},
 ]
 coverage = [
     {file = "coverage-5.5-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:b6d534e4b2ab35c9f93f46229363e17f63c53ad01330df9f2d6bd1187e5eaacf"},
@@ -1380,6 +1423,9 @@ coverage = [
     {file = "coverage-5.5-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:8963a499849a1fc54b35b1c9f162f4108017b2e6db2c46c1bed93a72262ed083"},
     {file = "coverage-5.5-cp27-cp27mu-manylinux2010_i686.whl", hash = "sha256:869a64f53488f40fa5b5b9dcb9e9b2962a66a87dab37790f3fcfb5144b996ef5"},
     {file = "coverage-5.5-cp27-cp27mu-manylinux2010_x86_64.whl", hash = "sha256:4a7697d8cb0f27399b0e393c0b90f0f1e40c82023ea4d45d22bce7032a5d7b81"},
+    {file = "coverage-5.5-cp310-cp310-macosx_10_14_x86_64.whl", hash = "sha256:8d0a0725ad7c1a0bcd8d1b437e191107d457e2ec1084b9f190630a4fb1af78e6"},
+    {file = "coverage-5.5-cp310-cp310-manylinux1_x86_64.whl", hash = "sha256:51cb9476a3987c8967ebab3f0fe144819781fca264f57f89760037a2ea191cb0"},
+    {file = "coverage-5.5-cp310-cp310-win_amd64.whl", hash = "sha256:c0891a6a97b09c1f3e073a890514d5012eb256845c451bd48f7968ef939bf4ae"},
     {file = "coverage-5.5-cp35-cp35m-macosx_10_9_x86_64.whl", hash = "sha256:3487286bc29a5aa4b93a072e9592f22254291ce96a9fbc5251f566b6b7343cdb"},
     {file = "coverage-5.5-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:deee1077aae10d8fa88cb02c845cfba9b62c55e1183f52f6ae6a2df6a2187160"},
     {file = "coverage-5.5-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:f11642dddbb0253cc8853254301b51390ba0081750a8ac03f20ea8103f0c56b6"},
@@ -1419,17 +1465,20 @@ coverage = [
     {file = "coverage-5.5-pp37-none-any.whl", hash = "sha256:2a3859cb82dcbda1cfd3e6f71c27081d18aa251d20a17d87d26d4cd216fb0af4"},
     {file = "coverage-5.5.tar.gz", hash = "sha256:ebe78fe9a0e874362175b02371bdfbee64d8edc42a044253ddf4ee7d3c15212c"},
 ]
+daemonocle = [
+    {file = "daemonocle-1.2.3.tar.gz", hash = "sha256:741ce6abc37c85ca396379a0d45710ac27ab5f17eeaadbc64a0f5cc4c4f666ea"},
+]
 decorator = [
-    {file = "decorator-5.0.9-py3-none-any.whl", hash = "sha256:6e5c199c16f7a9f0e3a61a4a54b3d27e7dad0dbdde92b944426cb20914376323"},
-    {file = "decorator-5.0.9.tar.gz", hash = "sha256:72ecfba4320a893c53f9706bebb2d55c270c1e51a28789361aa93e4a21319ed5"},
+    {file = "decorator-5.1.0-py3-none-any.whl", hash = "sha256:7b12e7c3c6ab203a29e157335e9122cb03de9ab7264b137594103fd4a683b374"},
+    {file = "decorator-5.1.0.tar.gz", hash = "sha256:e59913af105b9860aa2c8d3272d9de5a56a4e608db9a2f167a8480b323d529a7"},
 ]
 distlib = [
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     {file = "distlib-0.3.2.zip", hash = "sha256:106fef6dc37dd8c0e2c0a60d3fca3e77460a48907f335fa28420463a6f799736"},
 ]
 doc8 = [
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-    {file = "doc8-0.8.1.tar.gz", hash = "sha256:4d1df12598807cf08ffa9a1d5ef42d229ee0de42519da01b768ff27211082c12"},
+    {file = "doc8-0.9.0-py3-none-any.whl", hash = "sha256:91f6459a4b15c3aee2152e0cf59b7537ce199fe66b4df547dae63cfa92499e86"},
+    {file = "doc8-0.9.0.tar.gz", hash = "sha256:380b660474be40ce88b5f04fa93470449124dbc850a0318f2ef186162bc1360b"},
 ]
 docutils = [
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@@ -1444,44 +1493,40 @@ flake8 = [
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 ]
 furo = [
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-    {file = "furo-2021.6.18b36.tar.gz", hash = "sha256:46a30bc597a9067088d39d730e7d9bf6c1a1d71967e4af062f796769f66b3bdb"},
+    {file = "furo-2021.9.8-py3-none-any.whl", hash = "sha256:182d2ac70118191cb750caa763b997974a2c19f6f5fb7dfce458ce518dce80ae"},
+    {file = "furo-2021.9.8.tar.gz", hash = "sha256:eeaca6997c3a91240c5841d4f743d43196c4ef464b1236ff9b192d25f3e0d2ab"},
 ]
 idna = [
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+    {file = "idna-3.2-py3-none-any.whl", hash = "sha256:14475042e284991034cb48e06f6851428fb14c4dc953acd9be9a5e95c7b6dd7a"},
+    {file = "idna-3.2.tar.gz", hash = "sha256:467fbad99067910785144ce333826c71fb0e63a425657295239737f7ecd125f3"},
 ]
 imagesize = [
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     {file = "imagesize-1.2.0.tar.gz", hash = "sha256:b1f6b5a4eab1f73479a50fb79fcf729514a900c341d8503d62a62dbc4127a2b1"},
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 importlib-metadata = [
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+    {file = "importlib_metadata-4.8.1-py3-none-any.whl", hash = "sha256:b618b6d2d5ffa2f16add5697cf57a46c76a56229b0ed1c438322e4e95645bd15"},
+    {file = "importlib_metadata-4.8.1.tar.gz", hash = "sha256:f284b3e11256ad1e5d03ab86bb2ccd6f5339688ff17a4d797a0fe7df326f23b1"},
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 iniconfig = [
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 invoke = [
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+    {file = "invoke-1.6.0.tar.gz", hash = "sha256:374d1e2ecf78981da94bfaf95366216aaec27c2d6a7b7d5818d92da55aa258d3"},
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+    {file = "regex-2021.8.28.tar.gz", hash = "sha256:f585cbbeecb35f35609edccb95efd95a3e35824cd7752b586503f7e6087303f1"},
 ]
 requests = [
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+    {file = "requests-2.26.0.tar.gz", hash = "sha256:b8aa58f8cf793ffd8782d3d8cb19e66ef36f7aba4353eec859e74678b01b07a7"},
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@@ -1810,8 +1907,8 @@ rstcheck = [
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 ]
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+    {file = "sdsstools-0.4.13-py3-none-any.whl", hash = "sha256:758ce248bf5794cfd62eacf053f2cda2e05d3aeb561919b9db5811d76d2aed59"},
+    {file = "sdsstools-0.4.13.tar.gz", hash = "sha256:f7d2463017e71c4dcb9a6647192f8258f0242a1ae511d731b88f1fdd1ad33656"},
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@@ -1830,8 +1927,8 @@ soupsieve = [
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 ]
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+    {file = "Sphinx-4.2.0-py3-none-any.whl", hash = "sha256:98a535c62a4fcfcc362528592f69b26f7caec587d32cd55688db580be0287ae0"},
+    {file = "Sphinx-4.2.0.tar.gz", hash = "sha256:94078db9184491e15bce0a56d9186e0aec95f16ac20b12d00e06d4e36f1058a6"},
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@@ -1866,8 +1963,8 @@ sphinxcontrib-serializinghtml = [
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 ]
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+    {file = "stevedore-3.4.0-py3-none-any.whl", hash = "sha256:920ce6259f0b2498aaa4545989536a27e4e4607b8318802d7ddc3a533d3d069e"},
+    {file = "stevedore-3.4.0.tar.gz", hash = "sha256:59b58edb7f57b11897f150475e7bc0c39c5381f0b8e3fa9f5c20ce6c89ec4aa1"},
 ]
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@@ -1876,6 +1973,10 @@ toml = [
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 ]
+tomli = [
+    {file = "tomli-1.2.1-py3-none-any.whl", hash = "sha256:8dd0e9524d6f386271a36b41dbf6c57d8e32fd96fd22b6584679dc569d20899f"},
+    {file = "tomli-1.2.1.tar.gz", hash = "sha256:a5b75cb6f3968abb47af1b40c1819dc519ea82bcc065776a866e8d74c5ca9442"},
+]
 tornado = [
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@@ -1920,8 +2021,8 @@ tornado = [
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 ]
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-    {file = "traitlets-5.0.5.tar.gz", hash = "sha256:178f4ce988f69189f7e523337a3e11d91c786ded9360174a3d9ca83e79bc5396"},
+    {file = "traitlets-5.1.0-py3-none-any.whl", hash = "sha256:03f172516916220b58c9f19d7f854734136dd9528103d04e9bf139a92c9f54c4"},
+    {file = "traitlets-5.1.0.tar.gz", hash = "sha256:bd382d7ea181fbbcce157c133db9a829ce06edffe097bcf3ab945b435452b46d"},
 ]
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@@ -1956,17 +2057,17 @@ typed-ast = [
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 ]
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+    {file = "typing_extensions-3.10.0.2-py2-none-any.whl", hash = "sha256:d8226d10bc02a29bcc81df19a26e56a9647f8b0a6d4a83924139f4a8b01f17b7"},
+    {file = "typing_extensions-3.10.0.2-py3-none-any.whl", hash = "sha256:f1d25edafde516b146ecd0613dabcc61409817af4766fbbcfb8d1ad4ec441a34"},
+    {file = "typing_extensions-3.10.0.2.tar.gz", hash = "sha256:49f75d16ff11f1cd258e1b988ccff82a3ca5570217d7ad8c5f48205dd99a677e"},
 ]
 urllib3 = [
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+    {file = "urllib3-1.26.6-py2.py3-none-any.whl", hash = "sha256:39fb8672126159acb139a7718dd10806104dec1e2f0f6c88aab05d17df10c8d4"},
+    {file = "urllib3-1.26.6.tar.gz", hash = "sha256:f57b4c16c62fa2760b7e3d97c35b255512fb6b59a259730f36ba32ce9f8e342f"},
 ]
 virtualenv = [
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-    {file = "virtualenv-20.4.7.tar.gz", hash = "sha256:14fdf849f80dbb29a4eb6caa9875d476ee2a5cf76a5f5415fa2f1606010ab467"},
+    {file = "virtualenv-20.8.0-py2.py3-none-any.whl", hash = "sha256:a4b987ec31c3c9996cf1bc865332f967fe4a0512c41b39652d6224f696e69da5"},
+    {file = "virtualenv-20.8.0.tar.gz", hash = "sha256:4da4ac43888e97de9cf4fdd870f48ed864bbfd133d2c46cbdec941fed4a25aef"},
 ]
 wcwidth = [
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@@ -2012,6 +2113,6 @@ yarl = [
     {file = "yarl-1.6.3.tar.gz", hash = "sha256:8a9066529240171b68893d60dca86a763eae2139dd42f42106b03cf4b426bf10"},
 ]
 zipp = [
-    {file = "zipp-3.4.1-py3-none-any.whl", hash = "sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098"},
-    {file = "zipp-3.4.1.tar.gz", hash = "sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76"},
+    {file = "zipp-3.5.0-py3-none-any.whl", hash = "sha256:957cfda87797e389580cb8b9e3870841ca991e2125350677b2ca83a0e99390a3"},
+    {file = "zipp-3.5.0.tar.gz", hash = "sha256:f5812b1e007e48cff63449a5e9f4e7ebea716b4111f9c4f9a645f91d579bf0c4"},
 ]
diff --git a/python/clu/base.py b/python/clu/base.py
index c000394..712912f 100644
--- a/python/clu/base.py
+++ b/python/clu/base.py
@@ -248,6 +248,60 @@ class BaseClient(metaclass=abc.ABCMeta):
             "Sending commands is not implemented for this client."
         )
 
+    def proxy(self, actor: str) -> ProxyClient:
+        """Creates a proxy for an actor.
+
+        Returns a `.ProxyClient` that simplifies running a command multiple times.
+        For example ::
+
+            await client.send_command("focus_state", "moverelative -1000 UM")
+
+        can be replaced with ::
+
+            focus_stage = client.proxy("focus_stage")
+            await focus_stage.send_command("moverelative", "-1000", "UM")
+
+        """
+
+        return ProxyClient(self, actor)
+
+
+class ProxyClient:
+    """A proxy representing an actor.
+
+    Parameters
+    ----------
+    client
+        The client used to command the actor.
+    actor
+        The actor to command.
+
+    """
+
+    def __init__(self, client: BaseClient, actor: str):
+
+        self.client = client
+        self.actor = actor
+
+    def send_command(self, *args):
+        """Sends a command to the actor.
+
+        Returns the result of calling the client ``send_command()`` method
+        with the actor and concatenated arguments as parameters. Note that
+        in some cases the client ``send_command()`` method may be a coroutine
+        function, in which case the returned coroutine needs to be awaited.
+
+        Parameters
+        ----------
+        args
+            Arguments to pass to the actor. They will be concatenated using spaces.
+
+        """
+
+        command = " ".join(args)
+
+        return self.client.send_command(self.actor, command)
+
 
 class BaseActor(BaseClient):
     """An actor based on `asyncio`.


Test patch:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 16990ab..9e718ed 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -53,7 +53,7 @@ jobs:
           node-version: '15'
 
       - name: Install poetry
-        uses: abatilo/actions-poetry@v2.0.0
+        uses: abatilo/actions-poetry@master
 
       - name: Install dependencies
         run: |
diff --git a/tests/test_client.py b/tests/test_client.py
index 473cc33..1f3dd92 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -177,3 +177,14 @@ def test_client_config_extra_kwarg_varkw():
     assert client.name == "test_client_from_config"
     assert client.version == "0.1.0"
     assert client.custom_kw == "my custom value"
+
+
+def test_client_proxy(mocker):
+
+    client = SimpleClientTester("test_client")
+    send_command_mocker = mocker.patch.object(client, "send_command")
+
+    proxy = client.proxy("some_actor")
+    proxy.send_command("command1", "--param", "value")
+
+    send_command_mocker.assert_called_with("some_actor", "command1 --param value")