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# ==========================================================
# Modified from mmcv
# ==========================================================
import ast
import os.path as osp
import shutil
import sys
import tempfile
from argparse import Action
from importlib import import_module
import platform
from addict import Dict
from yapf.yapflib.yapf_api import FormatCode
BASE_KEY = "_base_"
DELETE_KEY = "_delete_"
RESERVED_KEYS = ["filename", "text", "pretty_text", "get", "dump", "merge_from_dict"]
def check_file_exist(filename, msg_tmpl='file "{}" does not exist'):
if not osp.isfile(filename):
raise FileNotFoundError(msg_tmpl.format(filename))
class ConfigDict(Dict):
def __missing__(self, name):
raise KeyError(name)
def __getattr__(self, name):
try:
value = super(ConfigDict, self).__getattr__(name)
except KeyError:
ex = AttributeError(f"'{self.__class__.__name__}' object has no " f"attribute '{name}'")
except Exception as e:
ex = e
else:
return value
raise ex
class SLConfig(object):
"""
config files.
only support .py file as config now.
ref: mmcv.utils.config
Example:
>>> cfg = Config(dict(a=1, b=dict(b1=[0, 1])))
>>> cfg.a
1
>>> cfg.b
{'b1': [0, 1]}
>>> cfg.b.b1
[0, 1]
>>> cfg = Config.fromfile('tests/data/config/a.py')
>>> cfg.filename
"/home/kchen/projects/mmcv/tests/data/config/a.py"
>>> cfg.item4
'test'
>>> cfg
"Config [path: /home/kchen/projects/mmcv/tests/data/config/a.py]: "
"{'item1': [1, 2], 'item2': {'a': 0}, 'item3': True, 'item4': 'test'}"
"""
@staticmethod
def _validate_py_syntax(filename):
with open(filename) as f:
content = f.read()
try:
ast.parse(content)
except SyntaxError:
raise SyntaxError("There are syntax errors in config " f"file {filename}")
@staticmethod
def _file2dict(filename):
filename = osp.abspath(osp.expanduser(filename))
check_file_exist(filename)
if filename.lower().endswith(".py"):
with tempfile.TemporaryDirectory() as temp_config_dir:
temp_config_file = tempfile.NamedTemporaryFile(dir=temp_config_dir, suffix=".py")
temp_config_name = osp.basename(temp_config_file.name)
if platform.system() == 'Windows':
temp_config_file.close()
shutil.copyfile(filename, osp.join(temp_config_dir, temp_config_name))
temp_module_name = osp.splitext(temp_config_name)[0]
sys.path.insert(0, temp_config_dir)
SLConfig._validate_py_syntax(filename)
mod = import_module(temp_module_name)
sys.path.pop(0)
cfg_dict = {
name: value for name, value in mod.__dict__.items() if not name.startswith("__")
}
# delete imported module
del sys.modules[temp_module_name]
# close temp file
temp_config_file.close()
elif filename.lower().endswith((".yml", ".yaml", ".json")):
from .slio import slload
cfg_dict = slload(filename)
else:
raise IOError("Only py/yml/yaml/json type are supported now!")
cfg_text = filename + "\n"
with open(filename, "r") as f:
cfg_text += f.read()
# parse the base file
if BASE_KEY in cfg_dict:
cfg_dir = osp.dirname(filename)
base_filename = cfg_dict.pop(BASE_KEY)
base_filename = base_filename if isinstance(base_filename, list) else [base_filename]
cfg_dict_list = list()
cfg_text_list = list()
for f in base_filename:
_cfg_dict, _cfg_text = SLConfig._file2dict(osp.join(cfg_dir, f))
cfg_dict_list.append(_cfg_dict)
cfg_text_list.append(_cfg_text)
base_cfg_dict = dict()
for c in cfg_dict_list:
if len(base_cfg_dict.keys() & c.keys()) > 0:
raise KeyError("Duplicate key is not allowed among bases")
# TODO Allow the duplicate key while warnning user
base_cfg_dict.update(c)
base_cfg_dict = SLConfig._merge_a_into_b(cfg_dict, base_cfg_dict)
cfg_dict = base_cfg_dict
# merge cfg_text
cfg_text_list.append(cfg_text)
cfg_text = "\n".join(cfg_text_list)
return cfg_dict, cfg_text
@staticmethod
def _merge_a_into_b(a, b):
"""merge dict `a` into dict `b` (non-inplace).
values in `a` will overwrite `b`.
copy first to avoid inplace modification
Args:
a ([type]): [description]
b ([type]): [description]
Returns:
[dict]: [description]
"""
# import ipdb; ipdb.set_trace()
if not isinstance(a, dict):
return a
b = b.copy()
for k, v in a.items():
if isinstance(v, dict) and k in b and not v.pop(DELETE_KEY, False):
if not isinstance(b[k], dict) and not isinstance(b[k], list):
# if :
# import ipdb; ipdb.set_trace()
raise TypeError(
f"{k}={v} in child config cannot inherit from base "
f"because {k} is a dict in the child config but is of "
f"type {type(b[k])} in base config. You may set "
f"`{DELETE_KEY}=True` to ignore the base config"
)
b[k] = SLConfig._merge_a_into_b(v, b[k])
elif isinstance(b, list):
try:
_ = int(k)
except:
raise TypeError(
f"b is a list, " f"index {k} should be an int when input but {type(k)}"
)
b[int(k)] = SLConfig._merge_a_into_b(v, b[int(k)])
else:
b[k] = v
return b
@staticmethod
def fromfile(filename):
cfg_dict, cfg_text = SLConfig._file2dict(filename)
return SLConfig(cfg_dict, cfg_text=cfg_text, filename=filename)
def __init__(self, cfg_dict=None, cfg_text=None, filename=None):
if cfg_dict is None:
cfg_dict = dict()
elif not isinstance(cfg_dict, dict):
raise TypeError("cfg_dict must be a dict, but " f"got {type(cfg_dict)}")
for key in cfg_dict:
if key in RESERVED_KEYS:
raise KeyError(f"{key} is reserved for config file")
super(SLConfig, self).__setattr__("_cfg_dict", ConfigDict(cfg_dict))
super(SLConfig, self).__setattr__("_filename", filename)
if cfg_text:
text = cfg_text
elif filename:
with open(filename, "r") as f:
text = f.read()
else:
text = ""
super(SLConfig, self).__setattr__("_text", text)
@property
def filename(self):
return self._filename
@property
def text(self):
return self._text
@property
def pretty_text(self):
indent = 4
def _indent(s_, num_spaces):
s = s_.split("\n")
if len(s) == 1:
return s_
first = s.pop(0)
s = [(num_spaces * " ") + line for line in s]
s = "\n".join(s)
s = first + "\n" + s
return s
def _format_basic_types(k, v, use_mapping=False):
if isinstance(v, str):
v_str = f"'{v}'"
else:
v_str = str(v)
if use_mapping:
k_str = f"'{k}'" if isinstance(k, str) else str(k)
attr_str = f"{k_str}: {v_str}"
else:
attr_str = f"{str(k)}={v_str}"
attr_str = _indent(attr_str, indent)
return attr_str
def _format_list(k, v, use_mapping=False):
# check if all items in the list are dict
if all(isinstance(_, dict) for _ in v):
v_str = "[\n"
v_str += "\n".join(
f"dict({_indent(_format_dict(v_), indent)})," for v_ in v
).rstrip(",")
if use_mapping:
k_str = f"'{k}'" if isinstance(k, str) else str(k)
attr_str = f"{k_str}: {v_str}"
else:
attr_str = f"{str(k)}={v_str}"
attr_str = _indent(attr_str, indent) + "]"
else:
attr_str = _format_basic_types(k, v, use_mapping)
return attr_str
def _contain_invalid_identifier(dict_str):
contain_invalid_identifier = False
for key_name in dict_str:
contain_invalid_identifier |= not str(key_name).isidentifier()
return contain_invalid_identifier
def _format_dict(input_dict, outest_level=False):
r = ""
s = []
use_mapping = _contain_invalid_identifier(input_dict)
if use_mapping:
r += "{"
for idx, (k, v) in enumerate(input_dict.items()):
is_last = idx >= len(input_dict) - 1
end = "" if outest_level or is_last else ","
if isinstance(v, dict):
v_str = "\n" + _format_dict(v)
if use_mapping:
k_str = f"'{k}'" if isinstance(k, str) else str(k)
attr_str = f"{k_str}: dict({v_str}"
else:
attr_str = f"{str(k)}=dict({v_str}"
attr_str = _indent(attr_str, indent) + ")" + end
elif isinstance(v, list):
attr_str = _format_list(k, v, use_mapping) + end
else:
attr_str = _format_basic_types(k, v, use_mapping) + end
s.append(attr_str)
r += "\n".join(s)
if use_mapping:
r += "}"
return r
cfg_dict = self._cfg_dict.to_dict()
text = _format_dict(cfg_dict, outest_level=True)
# copied from setup.cfg
yapf_style = dict(
based_on_style="pep8",
blank_line_before_nested_class_or_def=True,
split_before_expression_after_opening_paren=True,
)
text, _ = FormatCode(text, style_config=yapf_style, verify=True)
return text
def __repr__(self):
return f"Config (path: {self.filename}): {self._cfg_dict.__repr__()}"
def __len__(self):
return len(self._cfg_dict)
def __getattr__(self, name):
# # debug
# print('+'*15)
# print('name=%s' % name)
# print("addr:", id(self))
# # print('type(self):', type(self))
# print(self.__dict__)
# print('+'*15)
# if self.__dict__ == {}:
# raise ValueError
return getattr(self._cfg_dict, name)
def __getitem__(self, name):
return self._cfg_dict.__getitem__(name)
def __setattr__(self, name, value):
if isinstance(value, dict):
value = ConfigDict(value)
self._cfg_dict.__setattr__(name, value)
def __setitem__(self, name, value):
if isinstance(value, dict):
value = ConfigDict(value)
self._cfg_dict.__setitem__(name, value)
def __iter__(self):
return iter(self._cfg_dict)
def dump(self, file=None):
# import ipdb; ipdb.set_trace()
if file is None:
return self.pretty_text
else:
with open(file, "w") as f:
f.write(self.pretty_text)
def merge_from_dict(self, options):
"""Merge list into cfg_dict
Merge the dict parsed by MultipleKVAction into this cfg.
Examples:
>>> options = {'model.backbone.depth': 50,
... 'model.backbone.with_cp':True}
>>> cfg = Config(dict(model=dict(backbone=dict(type='ResNet'))))
>>> cfg.merge_from_dict(options)
>>> cfg_dict = super(Config, self).__getattribute__('_cfg_dict')
>>> assert cfg_dict == dict(
... model=dict(backbone=dict(depth=50, with_cp=True)))
Args:
options (dict): dict of configs to merge from.
"""
option_cfg_dict = {}
for full_key, v in options.items():
d = option_cfg_dict
key_list = full_key.split(".")
for subkey in key_list[:-1]:
d.setdefault(subkey, ConfigDict())
d = d[subkey]
subkey = key_list[-1]
d[subkey] = v
cfg_dict = super(SLConfig, self).__getattribute__("_cfg_dict")
super(SLConfig, self).__setattr__(
"_cfg_dict", SLConfig._merge_a_into_b(option_cfg_dict, cfg_dict)
)
# for multiprocess
def __setstate__(self, state):
self.__init__(state)
def copy(self):
return SLConfig(self._cfg_dict.copy())
def deepcopy(self):
return SLConfig(self._cfg_dict.deepcopy())
class DictAction(Action):
"""
argparse action to split an argument into KEY=VALUE form
on the first = and append to a dictionary. List options should
be passed as comma separated values, i.e KEY=V1,V2,V3
"""
@staticmethod
def _parse_int_float_bool(val):
try:
return int(val)
except ValueError:
pass
try:
return float(val)
except ValueError:
pass
if val.lower() in ["true", "false"]:
return True if val.lower() == "true" else False
if val.lower() in ["none", "null"]:
return None
return val
def __call__(self, parser, namespace, values, option_string=None):
options = {}
for kv in values:
key, val = kv.split("=", maxsplit=1)
val = [self._parse_int_float_bool(v) for v in val.split(",")]
if len(val) == 1:
val = val[0]
options[key] = val
setattr(namespace, self.dest, options)
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