gh-126899: Add **kw to tkinter.Misc.after and tkinter.Misc.after_idle

[Xiaokang2022]

• Issue: Add **kw to tkinter.Misc.after and tkinter.Misc.after_idle #126899

[graingert]

For this to work you need to make func and ms positional only, which is backwards incompatible

[Xiaokang2022]

For this to work you need to make func and ms positional only, which is backwards incompatible

Is making func and ms positional only a must? If not, it will not lead to incompatibilities.

I've found something similar elsewhere in tkinter, but it doesn't enforce that the preceding argument to positional only:

cpython/Lib/tkinter/ttk.py

Line 444 in 2313f84

def element_create(self, elementname, etype, *args, **kw):

and

cpython/Lib/tkinter/ttk.py

Line 547 in 2313f84

def instate(self, statespec, callback=None, *args, **kw):

[serhiy-storchaka]

It is not necessary to make other parameters positional only, but this can be considered in future, together with other methods that have var-keyword parameter.

In general, I do not see objections against this change. It does not also look that other Tkinter methods need similar change. But please add tests and a What's New entry.

[Xiaokang2022]

@serhiy-storchaka PTAL, thanks!