Function _check_class

Lib/inspect.py:1686–1690

(klass, attr)

def _check_class(klass, attr):
    for entry in _static_getmro(klass):
        if _shadowed_dict(type(entry)) is _sentinel and attr in entry.__dict__:
            return entry.__dict__[attr]
    return _sentinel


@functools.lru_cache()