Function _load_unlocked

Lib/importlib/_bootstrap.py:841–874

(spec)

    return module

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

    # This must be done before putting the module in sys.modules
    # (otherwise an optimization shortcut in import.c becomes
    # wrong).
    spec._initializing = True
    try:
        sys.modules[spec.name] = module
        try:
            if spec.loader is None:
                if spec.submodule_search_locations is None:
                    raise ImportError('missing loader', name=spec.name)
                # A namespace package so do nothing.
            else:
                spec.loader.exec_module(module)
        except:
            try:
                del sys.modules[spec.name]
            except KeyError:
                pass
            raise
        # Move the module to the end of sys.modules.
        # We don't ensure that the import-related module attributes get
        # set in the sys.modules replacement case.  Such modules are on
        # their own.
        module = sys.modules.pop(spec.name)
        sys.modules[spec.name] = module
        _verbose_message('import {!r} # {!r}', spec.name, spec.loader)
    finally:
        spec._initializing = False

    return module

# A method used during testing of _load_unlocked().
def _load(spec):