base.py 文件源码

def lookup_method(name, caller_type, *args):
    """Lookup method with the given name for the given type."""
    if isinstance(caller_type, TupleMeta):
        caller_origin = Tuple
    elif isinstance(caller_type, GenericMeta):
        caller_origin = _gorg(caller_type)
    else:
        caller_origin = caller_type

    return TYPE_SIGNATURES[caller_origin][name]