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import collections
import contextlib
import functools
import importlib
import sys
import types
_NO_ATTRIBUTE = object()
_Package = collections.namedtuple('Package', ('name', 'version'))
def get_package_info(module):
return _Package(
name=getattr(module, '_hypervideo_dl__identifier', module.__name__),
version=str(next(filter(None, (
getattr(module, attr, None)
for attr in ('__version__', 'version_string', 'version')
)), None)))
def _is_package(module):
return '__path__' in vars(module)
def _is_dunder(name):
return name.startswith('__') and name.endswith('__')
class EnhancedModule(types.ModuleType):
def __bool__(self):
return vars(self).get('__bool__', lambda: True)()
def __getattribute__(self, attr):
try:
ret = super().__getattribute__(attr)
except AttributeError:
if _is_dunder(attr):
raise
getter = getattr(self, '__getattr__', None)
if not getter:
raise
ret = getter(attr)
return ret.fget() if isinstance(ret, property) else ret
def passthrough_module(parent, child, allowed_attributes=(..., ), *, callback=lambda _: None):
"""Passthrough parent module into a child module, creating the parent if necessary"""
def __getattr__(attr):
if _is_package(parent):
with contextlib.suppress(ModuleNotFoundError):
return importlib.import_module(f'.{attr}', parent.__name__)
ret = from_child(attr)
if ret is _NO_ATTRIBUTE:
raise AttributeError(f'module {parent.__name__} has no attribute {attr}')
callback(attr)
return ret
@functools.lru_cache(maxsize=None)
def from_child(attr):
nonlocal child
if attr not in allowed_attributes:
if ... not in allowed_attributes or _is_dunder(attr):
return _NO_ATTRIBUTE
if isinstance(child, str):
child = importlib.import_module(child, parent.__name__)
if _is_package(child):
with contextlib.suppress(ImportError):
return passthrough_module(f'{parent.__name__}.{attr}',
importlib.import_module(f'.{attr}', child.__name__))
with contextlib.suppress(AttributeError):
return getattr(child, attr)
return _NO_ATTRIBUTE
parent = sys.modules.get(parent, types.ModuleType(parent))
parent.__class__ = EnhancedModule
parent.__getattr__ = __getattr__
return parent
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