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108 lines
3.1 KiB
108 lines
3.1 KiB
#!/usr/bin/env python
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# -*- encoding: utf-8 -*-
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import inspect
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import sys
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from importlib.machinery import SourceFileLoader
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from pathlib import Path
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from colossalai.logging import get_dist_logger
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class Config(dict):
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"""This is a wrapper class for dict objects so that values of which can be
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accessed as attributes.
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Args:
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config (dict): The dict object to be wrapped.
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"""
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def __init__(self, config: dict = None):
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if config is not None:
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for k, v in config.items():
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self._add_item(k, v)
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def __missing__(self, key):
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raise KeyError(key)
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def __getattr__(self, key):
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try:
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value = super(Config, self).__getitem__(key)
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return value
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except KeyError:
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raise AttributeError(key)
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def __setattr__(self, key, value):
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super(Config, self).__setitem__(key, value)
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def _add_item(self, key, value):
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if isinstance(value, dict):
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self.__setattr__(key, Config(value))
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else:
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self.__setattr__(key, value)
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def update(self, config):
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assert isinstance(config, (Config, dict)), "can only update dictionary or Config objects."
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for k, v in config.items():
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self._add_item(k, v)
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return self
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@staticmethod
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def from_file(filename: str):
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"""Reads a python file and constructs a corresponding :class:`Config` object.
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Args:
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filename (str): Name of the file to construct the return object.
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Returns:
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:class:`Config`: A :class:`Config` object constructed with information in the file.
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Raises:
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AssertionError: Raises an AssertionError if the file does not exist, or the file is not .py file
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"""
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# check config path
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if isinstance(filename, str):
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filepath = Path(filename).absolute()
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elif isinstance(filename, Path):
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filepath = filename.absolute()
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assert filepath.exists(), f"{filename} is not found, please check your configuration path"
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# check extension
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extension = filepath.suffix
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assert extension == ".py", "only .py files are supported"
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# import the config as module
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remove_path = False
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if filepath.parent not in sys.path:
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sys.path.insert(0, (filepath))
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remove_path = True
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module_name = filepath.stem
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source_file = SourceFileLoader(fullname=str(module_name), path=str(filepath))
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module = source_file.load_module()
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# load into config
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config = Config()
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for k, v in module.__dict__.items():
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if k.startswith("__") or inspect.ismodule(v) or inspect.isclass(v):
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continue
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else:
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config._add_item(k, v)
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logger = get_dist_logger()
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logger.debug("variables which starts with __, is a module or class declaration are omitted in config file")
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# remove module
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del sys.modules[module_name]
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if remove_path:
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sys.path.pop(0)
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return config
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class ConfigException(Exception):
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pass
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