import collections import contextlib import importlib import sys import types _NO_ATTRIBUTE = object() _Package = collections.namedtuple('Package', ('name', 'version')) def get_package_info(module): parent = module.__name__.split('.')[0] parent_module = None with contextlib.suppress(ImportError): parent_module = importlib.import_module(parent) for attr in ('__version__', 'version_string', 'version'): version = getattr(parent_module, attr, None) if version is not None: break return _Package(getattr(module, '_yt_dlp__identifier', parent), str(version)) def _is_package(module): try: module.__getattribute__('__path__') except AttributeError: return False return True def passthrough_module(parent, child, *, callback=lambda _: None): parent_module = importlib.import_module(parent) child_module = None # Import child module only as needed class PassthroughModule(types.ModuleType): def __getattr__(self, attr): if _is_package(parent_module): with contextlib.suppress(ImportError): return importlib.import_module(f'.{attr}', parent) nonlocal child_module child_module = child_module or importlib.import_module(child, parent) ret = _NO_ATTRIBUTE with contextlib.suppress(AttributeError): ret = getattr(child_module, attr) if _is_package(child_module): with contextlib.suppress(ImportError): ret = importlib.import_module(f'.{attr}', child) if ret is _NO_ATTRIBUTE: raise AttributeError(f'module {parent} has no attribute {attr}') callback(attr) return ret # Python 3.6 does not have module level __getattr__ # https://peps.python.org/pep-0562/ sys.modules[parent].__class__ = PassthroughModule