The canvas cannot be cleared after running turtledemo clock

[Wulian233]

Bug report

Bug description:

First, run turtledemo clock. Then stop

When the clock stops running, the date appears, and the clear button becomes unusable. After switching to other files, the date still remains visible. Even after other files finish, pressing the clear button still cannot clear the date, but it can clear the drawings of the current file.

Linked PRs

• gh-123370: Fix the canvas not clearing after running turtledemo.clock #123457
• [3.13] gh-123370: Fix the canvas not clearing after running turtledemo.clock (gh-123457) #125653
• [3.12] [3.13] gh-123370: Fix the canvas not clearing after running turtledemo.clock (gh-123457) (GH-125653) #125656

[hugovk]

GitHub is under a huge malware posting attack. Don't click the links or install anything from them, and I wouldn't waste time contacting the spammers. You can report the accounts to GitHub.

I've deleted the comments.

@python/organization-owners Please can you block the two accounts above?

[hugovk]

I reported these two and GitHub replied in 20 min to delete the jia6214876 account.

(They took a month for my last one.)

[terryjreedy]

I'd like either the spam discussion deleted or the meat (opening post and below moved to a new issue and deleted here.
...
I am likely the current core dev with most turtledemo knowledge. Both clock and nim use (t:=Turtle()).write('text') between tracer(False) and tracer(True) after t.clear() to remove previous writes. Colormixer also uses a one-time t.write(s) without touching tracer. After a couple of experiments, I still do not know why the screen reset and clear on restarts and loads does not work. A possible next move is to minimize clock until the ghost disappears.

[Wulian233]

I deleted my own comment, leaving hugovk's. The bug now is that drawn text will not be cleared. I tried to solve this problem, including stopIt func

self.screen.clear()
self.canvas.update()
self.canvas.delete("all") 

But all didn't work. I guess this bug has to do with write

[Wulian233]

I submitted a PR yesterday, but I noticed that the turtledemo did not set the codeowner to review the request. Could Terry take a review please, Thanks!

[terryjreedy]

I just added self as turtledemo codeowner. I'd like to see a follow-up 'modernize PR to

1. Replace module docstring with "turtledemo/clock.py -- clock program showing time and date." File name is wrong and instruction only applies when run in turtledemo, which it is redundant.

2. Replace German parameter names:
   distanz, winkel = distance, angle
   laenge, spitze = length, tip
   'tip' is length of side of equilateral tip triangle; would consider another pair.

Or for 1 & 2, a new issue to also modernize other files with obsolete and bloated docstrings and German names and comments. Note that tearing off Examples menu makes it easy to look through files quickly.

3. In 'def hand', replace divisor in 'tip/2.0' with maybe 3.0 so just isosceles but not equilateral. What looks good to you?

4. At end, remove creation and printing of 'msg' (main() call still needed though).

[Wulian233]

1. Replace module docstring with "turtledemo/clock.py -- clock program showing time and date." File name is wrong and instruction only applies when run in turtledemo, which it is redundant.

This problem is present in every file and can be changed in the new PR

2. Replace German parameter names:
   distanz, winkel = distance, angle
   laenge, spitze = length, tip
   'tip' is length of side of equilateral tip triangle; would consider another pair.

I've replaced this https://github.com/python/cpython/pull/123457/files

3. In 'def hand', replace divisor in 'tip/2.0' with maybe 3.0 so just isosceles but not equilateral. What looks good to you?

I think it's uglier :(

Or new issue to also modernize this and other files with 1. obsolete and bloated docstrings and 2. German names and comments.

Agree