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Created on 2020-03-29 08:29 by Alex-Python-Programmer, last changed 2022-04-11 14:59 by admin.
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| msg365247 - (view) | Author: Alex (Alex-Python-Programmer) | Date: 2020-03-29 08:29 | |
Python 3.8.2 IDLE has an unexpected behavior. When I insert an emoji into IDLE like 'π'. Then I found I can't delete it(by typing backspace). When I type the left arrow then it became 'νΈνΈ'(U+FFFD). Then I type the left arrow again, then it is 'π' again! (When I use the delete button, or type the right button there aren't any bugs.) What's wrong? Also, when I have two emojis like 'ππ', I press delete button between them, nothing happens; when I delete on the right, both of them disappear! (This bug seems not appears on plain 0.) |
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| msg365250 - (view) | Author: Terry J. Reedy (terry.reedy) *  |
Date: 2020-03-29 11:02 | |
Terminal codepages are irrelevant in the IDLE tk based gui. The problem is that windows codes astral chars as two surrogates. While tkinter can display them, after recent changes to _tkinter, the text widget cannot handle then properly when editing. This was explained in more detail on an earlier issue, but I will have to check if there is already an issue for fixing it.
For editing, one should use unicode escapes, as in
>>> print('\U0001f60d')
π
Python in a Windows console prints the surrogates separately.
and in IDLE, one will see a black-and_white version of the smiley.
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:28 | admin | set | github: 84281 |
| 2020-03-29 11:02:24 | terry.reedy | set | messages:
+ msg365250 title: Unexpected behavior when handling emoji under codec cp936 -> IDLE: Undesired behavior of emoji in editor. |
| 2020-03-29 08:29:07 | Alex-Python-Programmer | create | |