Function _signature_from_builtin

Lib/inspect.py:2291–2304

Private helper function to get signature for builtin callables.

(cls, func, skip_bound_arg=True)

def _signature_from_builtin(cls, func, skip_bound_arg=True):
    """Private helper function to get signature for
    builtin callables.
    """

    if not _signature_is_builtin(func):
        raise TypeError("{!r} is not a Python builtin "
                        "function".format(func))

    s = getattr(func, "__text_signature__", None)
    if not s:
        raise ValueError("no signature found for builtin {!r}".format(func))

    return _signature_fromstr(cls, func, s, skip_bound_arg)


def _signature_from_function(cls, func, skip_bound_arg=True,