Turtle context managers for `fill`, `poly` and `tracer`

[yngvem]

Feature or enhancement

Proposal:

When I taught Python with Turtle, I always had to find other examples when I got to context managers. This is a shame, as there are several places in the Turtle module where context managers make sense. The most obvious places (in my opinion) are:

• turtle.begin_fill() / turtle.end_fill()
• turtle.begin_poly() / turtle.end_poly()
• turtle.tracer(0) / turtle.tracer(1) (disable animations)

@MarieRoald and I plan to submit a PR about this shortly

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/improving-the-turtle-library/61840

Linked PRs

• gh-126349: Add context managers to turtle for fill, poly and no_animation #126350
• gh-126349: test_turtle: Add cleanup to avoid reference leaks #129079

[erlend-aasland]

Thanks for suggesting and implementing this!

[hugovk]

Let's re-open to handle the reference leak: #126350 (comment).