Restore default __str__ of tkinter.EventType

[serhiy-storchaka]

BPO	41831
Nosy	@terryjreedy, @ethanfurman, @serhiy-storchaka, @miss-islington
PRs	bpo-41831: Add tests for tkinter.Event.__repr__ #22354 bpo-41831: Restore str implementation of __str__ in tkinter.EventType #22355 [3.8] bpo-41831: Add tests for tkinter.Event.__repr__ (GH-22354) #22616 [3.9] bpo-41831: Add tests for tkinter.Event.__repr__ (GH-22354) #22617 [3.9] bpo-41831: Restore str implementation of __str__ in tkinter.EventType (GH-22355) #22622 [3.8] bpo-41831: Restore str implementation of __str__ in tkinter.EventType (GH-22355) #22623

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-10-09.20:21:54.349>
created_at = <Date 2020-09-22.08:02:08.083>
labels = ['3.8', 'type-bug', 'expert-tkinter', '3.9', '3.10']
title = 'Restore default __str__ of tkinter.EventType'
updated_at = <Date 2020-10-09.20:21:54.349>
user = 'https://github.com/serhiy-storchaka'

bugs.python.org fields:

activity = <Date 2020-10-09.20:21:54.349>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = True
closed_date = <Date 2020-10-09.20:21:54.349>
closer = 'serhiy.storchaka'
components = ['Tkinter']
creation = <Date 2020-09-22.08:02:08.083>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 41831
keywords = ['patch']
message_count = 7.0
messages = ['377306', '378335', '378336', '378341', '378342', '378348', '378349']
nosy_count = 4.0
nosy_names = ['terry.reedy', 'ethan.furman', 'serhiy.storchaka', 'miss-islington']
pr_nums = ['22354', '22355', '22616', '22617', '22622', '22623']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue41831'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']

[serhiy-storchaka]

The tkinter.EventType enum was introduced in bpo-27294. It implements __str__ as returning the name for the sole purpose of using in Event.__repr__(). But overriding __str__ in the str subclass may be not good idea, because different code will get different string representation, depending on whether it calls str() explicitly or implicitly (Python code) or read the content of the str object directly using C API (C code).

The following code sets EventType.__str__ = str.__str__, so both method will get the same value. Instead Event.__repr__() was changed to use the name of the enum member directly.

[serhiy-storchaka]

New changeset f25323a by Serhiy Storchaka in branch 'master':
bpo-41831: Add tests for tkinter.Event.__repr__ (GH-22354)
f25323a

[miss-islington]

New changeset 8693854 by Miss Skeleton (bot) in branch '3.8':
bpo-41831: Add tests for tkinter.Event.__repr__ (GH-22354)
8693854

[serhiy-storchaka]

New changeset 43c3eaf by Miss Skeleton (bot) in branch '3.9':
bpo-41831: Add tests for tkinter.Event.__repr__ (GH-22354) (GH-22617)
43c3eaf

[serhiy-storchaka]

New changeset eb38c6b by Serhiy Storchaka in branch 'master':
bpo-41831: Restore str implementation of __str__ in tkinter.EventType (GH-22355)
eb38c6b