I've missed this feature on occasion as well. +1 for whatever that counts; On Mon, 22 Mar 2021 at 17:30, Caleb Donovick <donovick@cs.stanford.edu> wrote:
Never needed this for lists but definitely had the pain for kwargs. Seems very reasonable for that use case, +0.5.
In libraries I control I can make sure to use the same default values for functions and their wrappers. However when wrapping functions I don't control there is not a great way to do this. And I end up incrementally building up a kwargs dict. I suppose the same thing could occur with *args lists so it makes sense for both positional and keyword arguments.
Yes one could do something like: ``` def fun(a, b=0): ... def wraps_fun(args, b=inspect.signature(fun).parameters['b'].default): ... ``` But I would hardly call that clear. Further it is not robust as would fail if `fun` is itself wrapped in way that destroys its signature. E.g.: ``` def destroy_signature(f): # should decorate here with functools.wraps(f) def wrapper(*args, **kwargs): return f(*args, **kwargs) return wrapper ```
Caleb _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-leave@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/2EHOQD... Code of Conduct: http://python.org/psf/codeofconduct/