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# Copyright (c) OpenMMLab. All rights reserved.
import ast
import copy
import os
import os.path as osp
import platform
import shutil
import sys
import tempfile
import types
import uuid
import warnings
from argparse import Action, ArgumentParser, Namespace
from collections import OrderedDict, abc
from contextlib import contextmanager
from pathlib import Path
from typing import Any, Optional, Sequence, Tuple, Union
from addict import Dict
from utils.util import check_file_exist
import re
BASE_KEY = '_base_'
DELETE_KEY = '_delete_'
DEPRECATION_KEY = '_deprecation_'
RESERVED_KEYS = ['filename', 'text', 'pretty_text', 'env_variables']
class ConfigDict(Dict):
def __missing__(self, name):
raise KeyError(name)
def __getattr__(self, name):
try:
value = super().__getattr__(name)
except KeyError:
raise AttributeError(f"'{self.__class__.__name__}' object has no "
f"attribute '{name}'")
except Exception as e:
raise e
else:
return value
def __deepcopy__(self, memo):
other = self.__class__()
memo[id(self)] = other
for key, value in super().items():
other[copy.deepcopy(key, memo)] = copy.deepcopy(value, memo)
return other
def __copy__(self):
other = self.__class__()
for key, value in super().items():
other[key] = value
return other
copy = __copy__
def merge(self, other: dict):
"""Merge another dictionary into current dictionary.
Args:
other (dict): Another dictionary.
"""
default = object()
def _merge_a_into_b(a, b):
if isinstance(a, dict):
if not isinstance(b, dict):
a.pop(DELETE_KEY, None)
return a
if a.pop(DELETE_KEY, False):
b.clear()
all_keys = list(b.keys()) + list(a.keys())
return {
key:
_merge_a_into_b(a.get(key, default), b.get(key, default))
for key in all_keys if key != DELETE_KEY
}
else:
return a if a is not default else b
merged = _merge_a_into_b(copy.deepcopy(other), copy.deepcopy(self))
self.clear()
for key, value in merged.items():
self[key] = value
class RemoveAssignFromAST(ast.NodeTransformer):
"""Remove Assign node if the target's name match the key.
Args:
key (str): The target name of the Assign node.
"""
def __init__(self, key):
self.key = key
def visit_Assign(self, node):
if (isinstance(node.targets[0], ast.Name)
and node.targets[0].id == self.key):
return None
else:
return node
class Config:
"""A facility for config and config files.
It supports common file formats as configs: python/json/yaml.
``Config.fromfile`` can parse a dictionary from a config file, then
build a ``Config`` instance with the dictionary.
The interface is the same as a dict object and also allows access config
values as attributes.
Args:
cfg_dict (dict, optional): A config dictionary. Defaults to None.
cfg_text (str, optional): Text of config. Defaults to None.
filename (str or Path, optional): Name of config file.
Defaults to None.
format_python_code (bool): Whether to format Python code by yapf.
Defaults to True.
Here is a simple example:
Examples:
>>> 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/username/projects/mmengine/tests/data/config/a.py"
>>> cfg.item4
'test'
>>> cfg
"Config [path: /home/username/projects/mmengine/tests/data/config/a.py]
:"
"{'item1': [1, 2], 'item2': {'a': 0}, 'item3': True, 'item4': 'test'}"
You can find more advance usage in the `config tutorial`_.
.. _config tutorial: https://mmengine.readthedocs.io/en/latest/advanced_tutorials/config.html
""" # noqa: E501
def __init__(
self,
cfg_dict: dict = None,
cfg_text: Optional[str] = None,
filename: Optional[Union[str, Path]] = None,
env_variables: Optional[dict] = None,
format_python_code: bool = True,
):
filename = str(filename) if isinstance(filename, Path) else filename
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')
if not isinstance(cfg_dict, ConfigDict):
cfg_dict = ConfigDict(cfg_dict)
super().__setattr__('_cfg_dict', cfg_dict)
super().__setattr__('_filename', filename)
super().__setattr__('_format_python_code', format_python_code)
if not hasattr(self, '_imported_names'):
super().__setattr__('_imported_names', set())
if cfg_text:
text = cfg_text
elif filename:
with open(filename, encoding='utf-8') as f:
text = f.read()
else:
text = ''
super().__setattr__('_text', text)
if env_variables is None:
env_variables = dict()
super().__setattr__('_env_variables', env_variables)
@staticmethod
def fromfile(filename: Union[str, Path],
use_predefined_variables: bool = True,
import_custom_modules: bool = True,
use_environment_variables: bool = True,
format_python_code: bool = True) -> 'Config':
"""Build a Config instance from config file.
Args:
filename (str or Path): Name of config file.
use_predefined_variables (bool, optional): Whether to use
predefined variables. Defaults to True.
import_custom_modules (bool, optional): Whether to support
importing custom modules in config. Defaults to None.
lazy_import (bool): Whether to load config in `lazy_import` mode.
If it is `None`, it will be deduced by the content of the
config file. Defaults to None.
format_python_code (bool): Whether to format Python code by yapf.
Defaults to True.
Returns:
Config: Config instance built from config file.
"""
filename = str(filename) if isinstance(filename, Path) else filename
cfg_dict, cfg_text, env_variables = Config._file2dict(
filename, use_predefined_variables, use_environment_variables)
return Config(
cfg_dict,
cfg_text=cfg_text,
filename=filename,
env_variables=env_variables)
@staticmethod
def _get_base_modules(nodes: list) -> list:
"""Get base module name from parsed code.
Args:
nodes (list): Parsed code of the config file.
Returns:
list: Name of base modules.
"""
def _get_base_module_from_with(with_nodes: list) -> list:
"""Get base module name from if statement in python file.
Args:
with_nodes (list): List of if statement.
Returns:
list: Name of base modules.
"""
base_modules = []
for node in with_nodes:
assert isinstance(node, ast.ImportFrom), (
'Illegal syntax in config file! Only '
'`from ... import ...` could be implemented` in '
'with read_base()`')
assert node.module is not None, (
'Illegal syntax in config file! Syntax like '
'`from . import xxx` is not allowed in `with read_base()`')
base_modules.append(node.level * '.' + node.module)
return base_modules
for idx, node in enumerate(nodes):
if (isinstance(node, ast.Assign)
and isinstance(node.targets[0], ast.Name)
and node.targets[0].id == BASE_KEY):
raise RuntimeError(
'The configuration file type in the inheritance chain '
'must match the current configuration file type, either '
'"lazy_import" or non-"lazy_import". You got this error '
f'since you use the syntax like `_base_ = "{node.targets[0].id}"` ' # noqa: E501
'in your config. You should use `with read_base(): ... to` ' # noqa: E501
'mark the inherited config file. See more information '
'in https://mmengine.readthedocs.io/en/latest/advanced_tutorials/config.html' # noqa: E501
)
if not isinstance(node, ast.With):
continue
expr = node.items[0].context_expr
if (not isinstance(expr, ast.Call)
or not expr.func.id == 'read_base' or # type: ignore
len(node.items) > 1):
raise RuntimeError(
'Only `read_base` context manager can be used in the '
'config')
# The original code:
# ```
# with read_base():
# from .._base_.default_runtime import *
# ```
# The processed code:
# ```
# from .._base_.default_runtime import *
# ```
# As you can see, the if statement is removed and the
# from ... import statement will be unindent
for nested_idx, nested_node in enumerate(node.body):
nodes.insert(idx + nested_idx + 1, nested_node)
nodes.pop(idx)
return _get_base_module_from_with(node.body)
return []
@staticmethod
def _validate_py_syntax(filename: str):
"""Validate syntax of python config.
Args:
filename (str): Filename of python config file.
"""
with open(filename, encoding='utf-8') as f:
content = f.read()
try:
ast.parse(content)
except SyntaxError as e:
raise SyntaxError('There are syntax errors in config '
f'file {filename}: {e}')
@staticmethod
def _substitute_predefined_vars(filename: str, temp_config_name: str):
"""Substitute predefined variables in config with actual values.
"""
file_dirname = osp.dirname(filename)
file_basename = osp.basename(filename)
file_basename_no_extension = osp.splitext(file_basename)[0]
file_extname = osp.splitext(filename)[1]
support_templates = dict(
fileDirname=file_dirname,
fileBasename=file_basename,
fileBasenameNoExtension=file_basename_no_extension,
fileExtname=file_extname)
with open(filename, encoding='utf-8') as f:
config_file = f.read()
for key, value in support_templates.items():
regexp = r'\{\{\s*' + str(key) + r'\s*\}\}'
value = value.replace('\\', '/')
config_file = re.sub(regexp, value, config_file)
with open(temp_config_name, 'w', encoding='utf-8') as tmp_config_file:
tmp_config_file.write(config_file)
@staticmethod
def _substitute_env_variables(filename: str, temp_config_name: str):
"""Substitute environment variables in config with actual values.
Sometimes, we want to change some items in the config with environment
variables. For examples, we expect to change dataset root by setting
``DATASET_ROOT=/dataset/root/path`` in the command line. This can be
easily achieved by writing lines in the config as follows
.. code-block:: python
data_root = '{{$DATASET_ROOT:/default/dataset}}/images'
Here, ``{{$DATASET_ROOT:/default/dataset}}`` indicates using the
environment variable ``DATASET_ROOT`` to replace the part between
``{{}}``. If the ``DATASET_ROOT`` is not set, the default value
``/default/dataset`` will be used.
Environment variables not only can replace items in the string, they
can also substitute other types of data in config. In this situation,
we can write the config as below
.. code-block:: python
model = dict(
bbox_head = dict(num_classes={{'$NUM_CLASSES:80'}}))
For details, Please refer to docs/zh_cn/tutorials/config.md .
Args:
filename (str): Filename of config.
temp_config_name (str): Temporary filename to save substituted
config.
"""
with open(filename, encoding='utf-8') as f:
config_file = f.read()
regexp = r'\{\{[\'\"]?\s*\$(\w+)\s*\:\s*(\S*?)\s*[\'\"]?\}\}'
keys = re.findall(regexp, config_file)
env_variables = dict()
for var_name, value in keys:
regexp = r'\{\{[\'\"]?\s*\$' + var_name + r'\s*\:\s*' \
+ value + r'\s*[\'\"]?\}\}'
if var_name in os.environ:
value = os.environ[var_name]
env_variables[var_name] = value
if not value:
raise KeyError(f'`{var_name}` cannot be found in `os.environ`.'
f' Please set `{var_name}` in environment or '
'give a default value.')
config_file = re.sub(regexp, value, config_file)
with open(temp_config_name, 'w', encoding='utf-8') as tmp_config_file:
tmp_config_file.write(config_file)
return env_variables
@staticmethod
def _pre_substitute_base_vars(filename: str,
temp_config_name: str) -> dict:
"""Preceding step for substituting variables in base config with actual
value.
Args:
filename (str): Filename of config.
temp_config_name (str): Temporary filename to save substituted
config.
Returns:
dict: A dictionary contains variables in base config.
"""
with open(filename, encoding='utf-8') as f:
config_file = f.read()
base_var_dict = {}
regexp = r'\{\{\s*' + BASE_KEY + r'\.([\w\.]+)\s*\}\}'
base_vars = set(re.findall(regexp, config_file))
for base_var in base_vars:
randstr = f'_{base_var}_{uuid.uuid4().hex.lower()[:6]}'
base_var_dict[randstr] = base_var
regexp = r'\{\{\s*' + BASE_KEY + r'\.' + base_var + r'\s*\}\}'
config_file = re.sub(regexp, f'"{randstr}"', config_file)
with open(temp_config_name, 'w', encoding='utf-8') as tmp_config_file:
tmp_config_file.write(config_file)
return base_var_dict
@staticmethod
def _substitute_base_vars(cfg: Any, base_var_dict: dict,
base_cfg: dict) -> Any:
"""Substitute base variables from strings to their actual values.
Args:
Any : Config dictionary.
base_var_dict (dict): A dictionary contains variables in base
config.
base_cfg (dict): Base config dictionary.
Returns:
Any : A dictionary with origin base variables
substituted with actual values.
"""
cfg = copy.deepcopy(cfg)
if isinstance(cfg, dict):
for k, v in cfg.items():
if isinstance(v, str) and v in base_var_dict:
new_v = base_cfg
for new_k in base_var_dict[v].split('.'):
new_v = new_v[new_k]
cfg[k] = new_v
elif isinstance(v, (list, tuple, dict)):
cfg[k] = Config._substitute_base_vars(
v, base_var_dict, base_cfg)
elif isinstance(cfg, tuple):
cfg = tuple(
Config._substitute_base_vars(c, base_var_dict, base_cfg)
for c in cfg)
elif isinstance(cfg, list):
cfg = [
Config._substitute_base_vars(c, base_var_dict, base_cfg)
for c in cfg
]
elif isinstance(cfg, str) and cfg in base_var_dict:
new_v = base_cfg
for new_k in base_var_dict[cfg].split('.'):
new_v = new_v[new_k]
cfg = new_v
return cfg
@staticmethod
def _file2dict(
filename: str,
use_predefined_variables: bool = True,
use_environment_variables: bool = True) -> Tuple[dict, str, dict]:
"""Transform file to variables dictionary.
Args:
filename (str): Name of config file.
use_predefined_variables (bool, optional): Whether to use
predefined variables. Defaults to True.
Returns:
Tuple[dict, str]: Variables dictionary and text of Config.
"""
filename = osp.abspath(osp.expanduser(filename))
check_file_exist(filename)
fileExtname = osp.splitext(filename)[1]
if fileExtname not in ['.py']:
raise OSError('Only py type are supported now!')
try:
with tempfile.TemporaryDirectory() as temp_config_dir:
temp_config_file = tempfile.NamedTemporaryFile(
dir=temp_config_dir, suffix=fileExtname, delete=False)
if platform.system() == 'Windows':
temp_config_file.close()
# Substitute predefined variables
if use_predefined_variables:
Config._substitute_predefined_vars(filename,
temp_config_file.name)
else:
shutil.copyfile(filename, temp_config_file.name)
# Substitute environment variables
env_variables = dict()
if use_environment_variables:
env_variables = Config._substitute_env_variables(
temp_config_file.name, temp_config_file.name)
# Substitute base variables from placeholders to strings
base_var_dict = Config._pre_substitute_base_vars(
temp_config_file.name, temp_config_file.name)
# Handle base files
base_cfg_dict = ConfigDict()
cfg_text_list = list()
for base_cfg_path in Config._get_base_files(
temp_config_file.name):
base_cfg_path, scope = Config._get_cfg_path(
base_cfg_path, filename)
_cfg_dict, _cfg_text, _env_variables = Config._file2dict(
filename=base_cfg_path,
use_predefined_variables=use_predefined_variables,
use_environment_variables=use_environment_variables)
cfg_text_list.append(_cfg_text)
env_variables.update(_env_variables)
duplicate_keys = base_cfg_dict.keys() & _cfg_dict.keys()
if len(duplicate_keys) > 0:
raise KeyError(
'Duplicate key is not allowed among bases. '
f'Duplicate keys: {duplicate_keys}')
# _dict_to_config_dict will do the following things:
# 1. Recursively converts ``dict`` to :obj:`ConfigDict`.
# 2. Set `_scope_` for the outer dict variable for the base
# config.
# 3. Set `scope` attribute for each base variable.
# Different from `_scope_`， `scope` is not a key of base
# dict, `scope` attribute will be parsed to key `_scope_`
# by function `_parse_scope` only if the base variable is
# accessed by the current config.
_cfg_dict = Config._dict_to_config_dict(_cfg_dict, scope)
base_cfg_dict.update(_cfg_dict)
with open(temp_config_file.name, encoding='utf-8') as f:
parsed_codes = ast.parse(f.read())
parsed_codes = RemoveAssignFromAST(BASE_KEY).visit(
parsed_codes)
codeobj = compile(parsed_codes, '', mode='exec')
# Support load global variable in nested function of the
# config.
global_locals_var = {BASE_KEY: base_cfg_dict}
ori_keys = set(global_locals_var.keys())
eval(codeobj, global_locals_var, global_locals_var)
cfg_dict = {
key: value
for key, value in global_locals_var.items()
if (key not in ori_keys and not key.startswith('__'))
}
# close temp file
for key, value in list(cfg_dict.items()):
if isinstance(value,
(types.FunctionType, types.ModuleType)):
cfg_dict.pop(key)
temp_config_file.close()
# If the current config accesses a base variable of base
# configs, The ``scope`` attribute of corresponding variable
# will be converted to the `_scope_`.
Config._parse_scope(cfg_dict)
except Exception as e:
if osp.exists(temp_config_dir):
shutil.rmtree(temp_config_dir)
raise e
cfg_text = filename + '\n'
with open(filename, encoding='utf-8') as f:
# Setting encoding explicitly to resolve coding issue on windows
cfg_text += f.read()
# Substitute base variables from strings to their actual values
cfg_dict = Config._substitute_base_vars(cfg_dict, base_var_dict,
base_cfg_dict)
cfg_dict.pop(BASE_KEY, None)
cfg_dict = Config._merge_a_into_b(cfg_dict, base_cfg_dict)
cfg_dict = {
k: v
for k, v in cfg_dict.items() if not k.startswith('__')
}
# merge cfg_text
cfg_text_list.append(cfg_text)
cfg_text = '\n'.join(cfg_text_list)
return cfg_dict, cfg_text, env_variables
@staticmethod
def _dict_to_config_dict_lazy(cfg: dict):
"""Recursively converts ``dict`` to :obj:`ConfigDict`. The only
difference between ``_dict_to_config_dict_lazy`` and
``_dict_to_config_dict_lazy`` is that the former one does not consider
the scope, and will not trigger the building of ``LazyObject``.
Args:
cfg (dict): Config dict.
Returns:
ConfigDict: Converted dict.
"""
# Only the outer dict with key `type` should have the key `_scope_`.
if isinstance(cfg, dict):
cfg_dict = ConfigDict()
for key, value in cfg.items():
cfg_dict[key] = Config._dict_to_config_dict_lazy(value)
return cfg_dict
if isinstance(cfg, (tuple, list)):
return type(cfg)(
Config._dict_to_config_dict_lazy(_cfg) for _cfg in cfg)
return cfg
@staticmethod
def _dict_to_config_dict(cfg: dict,
scope: Optional[str] = None,
has_scope=True):
"""Recursively converts ``dict`` to :obj:`ConfigDict`.
Args:
cfg (dict): Config dict.
scope (str, optional): Scope of instance.
has_scope (bool): Whether to add `_scope_` key to config dict.
Returns:
ConfigDict: Converted dict.
"""
# Only the outer dict with key `type` should have the key `_scope_`.
if isinstance(cfg, dict):
if has_scope and 'type' in cfg:
has_scope = False
if scope is not None and cfg.get('_scope_', None) is None:
cfg._scope_ = scope # type: ignore
cfg = ConfigDict(cfg)
dict.__setattr__(cfg, 'scope', scope)
for key, value in cfg.items():
cfg[key] = Config._dict_to_config_dict(
value, scope=scope, has_scope=has_scope)
elif isinstance(cfg, tuple):
cfg = tuple(
Config._dict_to_config_dict(_cfg, scope, has_scope=has_scope)
for _cfg in cfg)
elif isinstance(cfg, list):
cfg = [
Config._dict_to_config_dict(_cfg, scope, has_scope=has_scope)
for _cfg in cfg
]
return cfg
@staticmethod
def _parse_scope(cfg: dict) -> None:
"""Adds ``_scope_`` to :obj:`ConfigDict` instance, which means a base
variable.
If the config dict already has the scope, scope will not be
overwritten.
Args:
cfg (dict): Config needs to be parsed with scope.
"""
if isinstance(cfg, ConfigDict):
cfg._scope_ = cfg.scope
elif isinstance(cfg, (tuple, list)):
[Config._parse_scope(value) for value in cfg]
else:
return
@staticmethod
def _get_base_files(filename: str) -> list:
"""Get the base config file.
Args:
filename (str): The config file.
Raises:
TypeError: Name of config file.
Returns:
list: A list of base config.
"""
file_format = osp.splitext(filename)[1]
if file_format == '.py':
Config._validate_py_syntax(filename)
with open(filename, encoding='utf-8') as f:
parsed_codes = ast.parse(f.read()).body
def is_base_line(c):
return (isinstance(c, ast.Assign)
and isinstance(c.targets[0], ast.Name)
and c.targets[0].id == BASE_KEY)
base_code = next((c for c in parsed_codes if is_base_line(c)),
None)
if base_code is not None:
base_code = ast.Expression( # type: ignore
body=base_code.value) # type: ignore
base_files = eval(compile(base_code, '', mode='eval'))
else:
base_files = []
else:
raise TypeError('The config type should be py, but got {file_format}')
base_files = base_files if isinstance(base_files,
list) else [base_files]
return base_files
@staticmethod
def _get_cfg_path(cfg_path: str,
filename: str) -> Tuple[str, Optional[str]]:
"""Get the config path from the current or external package.
Args:
cfg_path (str): Relative path of config.
filename (str): The config file being parsed.
Returns:
Tuple[str, str or None]: Path and scope of config. If the config
is not an external config, the scope will be `None`.
"""
cfg_dir = osp.dirname(filename)
cfg_path = osp.join(cfg_dir, cfg_path)
return cfg_path, None
@staticmethod
def _merge_a_into_b(a: dict,
b: dict,
allow_list_keys: bool = False) -> dict:
"""merge dict ``a`` into dict ``b`` (non-inplace).
Values in ``a`` will overwrite ``b``. ``b`` is copied first to avoid
in-place modifications.
Args:
a (dict): The source dict to be merged into ``b``.
b (dict): The origin dict to be fetch keys from ``a``.
allow_list_keys (bool): If True, int string keys (e.g. '0', '1')
are allowed in source ``a`` and will replace the element of the
corresponding index in b if b is a list. Defaults to False.
Returns:
dict: The modified dict of ``b`` using ``a``.
Examples:
# Normally merge a into b.
>>> Config._merge_a_into_b(
... dict(obj=dict(a=2)), dict(obj=dict(a=1)))
{'obj': {'a': 2}}
# Delete b first and merge a into b.
>>> Config._merge_a_into_b(
... dict(obj=dict(_delete_=True, a=2)), dict(obj=dict(a=1)))
{'obj': {'a': 2}}
# b is a list
>>> Config._merge_a_into_b(
... {'0': dict(a=2)}, [dict(a=1), dict(b=2)], True)
[{'a': 2}, {'b': 2}]
"""
b = b.copy()
for k, v in a.items():
if allow_list_keys and k.isdigit() and isinstance(b, list):
k = int(k)
if len(b) <= k:
raise KeyError(f'Index {k} exceeds the length of list {b}')
b[k] = Config._merge_a_into_b(v, b[k], allow_list_keys)
elif isinstance(v, dict):
if k in b and not v.pop(DELETE_KEY, False):
allowed_types: Union[Tuple, type] = (
dict, list) if allow_list_keys else dict
if not isinstance(b[k], allowed_types):
raise TypeError(
f'{k}={v} in child config cannot inherit from '
f'base because {k} is a dict in the child config '
f'but is of type {type(b[k])} in base config. '
f'You may set `{DELETE_KEY}=True` to ignore the '
f'base config.')
b[k] = Config._merge_a_into_b(v, b[k], allow_list_keys)
else:
b[k] = ConfigDict(v)
else:
b[k] = v
return b
@property
def filename(self) -> str:
"""get file name of config."""
return self._filename
@property
def text(self) -> str:
"""get config text."""
return self._text
@property
def env_variables(self) -> dict:
"""get used environment variables."""
return self._env_variables
@property
def pretty_text(self) -> str:
"""get formatted python config text."""
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 = repr(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_tuple(k, v, use_mapping=False):
if isinstance(v, list):
left = '['
right = ']'
else:
left = '('
right = ')'
v_str = f'{left}\n'
# check if all items in the list are dict
for item in v:
if isinstance(item, dict):
v_str += f'dict({_indent(_format_dict(item), indent)}),\n'
elif isinstance(item, tuple):
v_str += f'{_indent(_format_list_tuple(None, item), indent)},\n' # noqa: 501
elif isinstance(item, list):
v_str += f'{_indent(_format_list_tuple(None, item), indent)},\n' # noqa: 501
elif isinstance(item, str):
v_str += f'{_indent(repr(item), indent)},\n'
else:
v_str += str(item) + ',\n'
if k is None:
return _indent(v_str, indent) + right
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) + right
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, tuple)):
attr_str = _format_list_tuple(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.to_dict()
text = _format_dict(cfg_dict, outest_level=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: str) -> Any:
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 __getstate__(self) -> Tuple[dict, Optional[str], Optional[str], dict]:
return (self._cfg_dict, self._filename, self._text,
self._env_variables)
def __deepcopy__(self, memo):
cls = self.__class__
other = cls.__new__(cls)
memo[id(self)] = other
for key, value in self.__dict__.items():
super(Config, other).__setattr__(key, copy.deepcopy(value, memo))
return other
def __copy__(self):
cls = self.__class__
other = cls.__new__(cls)
other.__dict__.update(self.__dict__)
super(Config, other).__setattr__('_cfg_dict', self._cfg_dict.copy())
return other
copy = __copy__
def __setstate__(self, state: Tuple[dict, Optional[str], Optional[str],
dict]):
_cfg_dict, _filename, _text, _env_variables = state
super().__setattr__('_cfg_dict', _cfg_dict)
super().__setattr__('_filename', _filename)
super().__setattr__('_text', _text)
super().__setattr__('_text', _env_variables)
def merge_from_dict(self,
options: dict,
allow_list_keys: bool = True) -> None:
"""Merge list into cfg_dict.
Merge the dict parsed by MultipleKVAction into this cfg.
Args:
options (dict): dict of configs to merge from.
allow_list_keys (bool): If True, int string keys (e.g. '0', '1')
are allowed in ``options`` and will replace the element of the
corresponding index in the config if the config is a list.
Defaults to True.
Examples:
>>> from mmengine import Config
>>> # Merge dictionary element
>>> 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._cfg_dict
{'model': {'backbone': {'type': 'ResNet', 'depth': 50, 'with_cp': True}}}
>>> # Merge list element
>>> cfg = Config(
>>> dict(pipeline=[dict(type='LoadImage'),
>>> dict(type='LoadAnnotations')]))
>>> options = dict(pipeline={'0': dict(type='SelfLoadImage')})
>>> cfg.merge_from_dict(options, allow_list_keys=True)
>>> cfg._cfg_dict
{'pipeline': [{'type': 'SelfLoadImage'}, {'type': 'LoadAnnotations'}]}
""" # noqa: E501
option_cfg_dict: 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().__getattribute__('_cfg_dict')
super().__setattr__(
'_cfg_dict',
Config._merge_a_into_b(
option_cfg_dict, cfg_dict, allow_list_keys=allow_list_keys))
def _to_lazy_dict(self, keep_imported: bool = False) -> dict:
"""Convert config object to dictionary and filter the imported
object."""
res = self._cfg_dict._to_lazy_dict()
if hasattr(self, '_imported_names') and not keep_imported:
res = {
key: value
for key, value in res.items()
if key not in self._imported_names
}
return res
def to_dict(self, keep_imported: bool = False):
"""Convert all data in the config to a builtin ``dict``.
Args:
keep_imported (bool): Whether to keep the imported field.
Defaults to False
If you import third-party objects in the config file, all imported
objects will be converted to a string like ``torch.optim.SGD``
"""
return self._cfg_dict.to_dict()
if __name__ == "__main__":
file_path = "/train-syncdata/xiaowen.ma/mycode/rssegmentation/configs/ssnet.py"
cfg = Config.fromfile(file_path)
print(cfg.model_config) |