Function _load_backward_compatible

Lib/importlib/_bootstrap.py:878–912

(spec)

def _load_backward_compatible(spec):
    # It is assumed that all callers have been warned about using load_module()
    # appropriately before calling this function.
    try:
        spec.loader.load_module(spec.name)
    except:
        if spec.name in sys.modules:
            module = sys.modules.pop(spec.name)
            sys.modules[spec.name] = module
        raise
    # The module must be in sys.modules at this point!
    # Move it to the end of sys.modules.
    module = sys.modules.pop(spec.name)
    sys.modules[spec.name] = module
    if getattr(module, '__loader__', None) is None:
        try:
            module.__loader__ = spec.loader
        except AttributeError:
            pass
    if getattr(module, '__package__', None) is None:
        try:
            # Since module.__path__ may not line up with
            # spec.submodule_search_paths, we can't necessarily rely
            # on spec.parent here.
            module.__package__ = module.__name__
            if not hasattr(module, '__path__'):
                module.__package__ = spec.name.rpartition('.')[0]
        except AttributeError:
            pass
    if getattr(module, '__spec__', None) is None:
        try:
            module.__spec__ = spec
        except AttributeError:
            pass
    return module

def _load_unlocked(spec):
    # A helper for direct use by the import system.