Function _handle_fromlist

Lib/importlib/_bootstrap.py:1320–1354

Figure out what __import__ should return. The import_ parameter is a callable which takes the name of module to import. It is required to decouple the function from assuming importlib's import implementation is desired.

(module, fromlist, import_, *, recursive=False)

def _handle_fromlist(module, fromlist, import_, *, recursive=False):
    """Figure out what __import__ should return.

    The import_ parameter is a callable which takes the name of module to
    import. It is required to decouple the function from assuming importlib's
    import implementation is desired.

    """
    # The hell that is fromlist ...
    # If a package was imported, try to import stuff from fromlist.
    for x in fromlist:
        if not isinstance(x, str):
            if recursive:
                where = module.__name__ + '.__all__'
            else:
                where = "``from list''"
            raise TypeError(f"Item in {where} must be str, "
                            f"not {type(x).__name__}")
        elif x == '*':
            if not recursive and hasattr(module, '__all__'):
                _handle_fromlist(module, module.__all__, import_,
                                 recursive=True)
        elif not hasattr(module, x):
            from_name = f'{module.__name__}.{x}'
            try:
                _call_with_frames_removed(import_, from_name)
            except ModuleNotFoundError as exc:
                # Backwards-compatibility dictates we ignore failed
                # imports triggered by fromlist for modules that don't
                # exist.
                if (exc.name == from_name and
                    sys.modules.get(from_name, _NEEDS_LOADING) is not None):
                    continue
                raise
    return module


def _calc___package__(globals):