>>>import inspect, struct>>>help(struct.pack)Help on built-in function pack in module _struct:pack(...)    pack(format, v1, v2, ...) -> bytes    Return a bytes object containing the values v1, v2, ... packed according    to the format string.  See help(struct) for more on format strings.>>> inspect.signature(struct.pack)Traceback (most recent call last):  File "<python-input-6>", line 1, in <module>    inspect.signature(struct.pack)    ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^  File "/usr/local/lib/python3.15/inspect.py", line 3346, in signature    return Signature.from_callable(obj, follow_wrapped=follow_wrapped,           ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                   globals=globals, locals=locals, eval_str=eval_str,                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                                   annotation_format=annotation_format)                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  File "/usr/local/lib/python3.15/inspect.py", line 3061, in from_callable    return _signature_from_callable(obj, sigcls=cls,                                    follow_wrapper_chains=follow_wrapped,                                    globals=globals, locals=locals, eval_str=eval_str,                                    annotation_format=annotation_format)  File "/usr/local/lib/python3.15/inspect.py", line 2542, in _signature_from_callable    return _signature_from_builtin(sigcls, obj,                                   skip_bound_arg=skip_bound_arg)  File "/usr/local/lib/python3.15/inspect.py", line 2326, in _signature_from_builtin    raise ValueError("no signature found for builtin {!r}".format(func))ValueError: no signature found for builtin <built-in function pack>