E. Paine <xepain...@gmail.com> added the comment:

Reproducible in Python 3.9. The issue occurs because functools.partial is a 
class, not function. I believe the fix is simply something like:

try:
    callit.__name__ = func.__name__
except AttributeError:
    callit.__name__ = type(func).__name__

This will use the name 'partial'. The lack of '__name__' is noted in the 
functools docs so I agree with Philip that this is an issue with tkinter. 
Philip, do you want to open a pull request for this?

It should be noted that functools.partial is not required in this situation as 
'after' takes arguments for the function call:
r.after(500, print, "lol")

----------
nosy: +epaine, serhiy.storchaka
versions: +Python 3.10, Python 3.11

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44404>
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