83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
# Copyright (c) Alibaba, Inc. and its affiliates.
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# Copyright 2023-present the HuggingFace Inc. team.
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import importlib
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import os
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from itertools import chain
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from types import ModuleType
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from typing import Any
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from .logger import get_logger
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logger = get_logger() # pylint: disable=invalid-name
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class _LazyModule(ModuleType):
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"""
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Module class that surfaces all objects but only performs associated imports when the objects are requested.
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"""
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# Very heavily inspired by optuna.integration._IntegrationModule
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# https://github.com/optuna/optuna/blob/master/optuna/integration/__init__.py
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def __init__(self, name, module_file, import_structure, module_spec=None, extra_objects=None):
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super().__init__(name)
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self._modules = set(import_structure.keys())
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self._class_to_module = {}
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for key, values in import_structure.items():
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for value in values:
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self._class_to_module[value] = key
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# Needed for autocompletion in an IDE
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self.__all__ = list(import_structure.keys()) + list(chain(*import_structure.values()))
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self.__file__ = module_file
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self.__spec__ = module_spec
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self.__path__ = [os.path.dirname(module_file)]
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self._objects = {} if extra_objects is None else extra_objects
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self._name = name
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self._import_structure = import_structure
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# Needed for autocompletion in an IDE
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def __dir__(self):
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result = super().__dir__()
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# The elements of self.__all__ that are submodules may or may not be in the dir already, depending on whether
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# they have been accessed or not. So we only add the elements of self.__all__ that are not already in the dir.
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for attr in self.__all__:
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if attr not in result:
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result.append(attr)
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return result
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def __getattr__(self, name: str) -> Any:
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if name in self._objects:
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return self._objects[name]
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if name in self._modules:
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value = self._get_module(name)
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elif name in self._class_to_module.keys():
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module = self._get_module(self._class_to_module[name])
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value = getattr(module, name)
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else:
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raise AttributeError(f'module {self.__name__} has no attribute {name}')
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setattr(self, name, value)
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return value
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def _get_module(self, module_name: str):
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return importlib.import_module('.' + module_name, self.__name__)
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def __reduce__(self):
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return self.__class__, (self._name, self.__file__, self._import_structure)
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def is_module_installed(module_name):
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try:
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importlib.import_module(module_name)
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return True
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except ImportError:
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return False
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def get_module_path(module_name):
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spec = importlib.util.find_spec(module_name)
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if spec and spec.origin:
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return os.path.abspath(spec.origin)
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else:
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raise ValueError(f'Cannot find module: {module_name}')
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