Add apply

[eliasmistler]

No description provided.

[llllllllll]

I am +1 because this is generally useful and is duplicated in a lot of code; however, I somewhat object to the phrase "clojure-like": https://docs.python.org/2/library/functions.html#apply. Still very Pythonic.

[eriknw]

Yeah, I agree this is common enough to justify being added.

It's unfortunate that apply is no longer anywhere to be found in core Python. The fatal flaw of the given implementation is that func= may not be used as a keyword.

What about something like this:

def apply(*func_and_args, **kwargs):
    if not func_and_args:
        raise TypeError('func argument is required')
    return func_and_args[0](*func_and_args[1:], **kwargs)

[eliasmistler]

@eriknw Agree and updated

[eliasmistler]

@eriknw ready to merge as far as I'm concerned

[eriknw]

This is in, thanks @eliasmistler! (and sorry for the delay)

[Hugovdberg]

Just a remark perhaps for future reference, as of Python 3.8 the signature could be simplified once more by use of the positional only indicator:

def apply(func, /, *args, **kwargs):
    return func(*args, **kwargs)

def test_no_keyword_clash(x, func):
    return x+func

apply(test_no_keyword_clash, x=1, func=2)