New submission from Cheryl Sabella <chek...@gmail.com>:
This was discovered while working on issue32839. An old comment added for
issue763637 resulted in further research and it was determined that the comment:
! data = self.tk.call('after', 'info', id)
! # In Tk 8.3, splitlist returns: (script, type)
! # In Tk 8.4, splitlist returns: (script,)
wasn't correct. The underlying difference is that the call to 'after info'
returns different results depending on the way it's called. If it's called
with an 'id', it will return a tuple of (script, type) if the id is valid or a
TclError if the id isn't valid. However, if id is None, then 'after info'
returns a tuple of all the event ids for the widget. In the case of the
original bug in issue763637, the reported message shows the return value of
`('after#53',)`, which is definitely an after event id and not a (script,)
tuple.
Serhiy mentions on issue32839 that the current code also deletes the script for
the first event if after_cancel is called with None.
https://bugs.python.org/issue32839#msg312199
----------
components: Tkinter
messages: 312231
nosy: csabella
priority: normal
severity: normal
status: open
title: tkinter after_cancel does not behave correctly when called with id=None
type: behavior
versions: Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue32857>
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