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I wonder why the module 'turtle' was moved to the 'tkinter' package. It
is not a part of Tk, it does not provide new or extend existing tkinter
API. While it uses tkinter, so do pydoc or idle; this is just an
implementation detail. If some day a new GUI library replaces tkinter
in the standard Python library, turtle's interface will not have to be
changed, only the implementation. Moreover this change unnecessarily
breaks all existing demos and tutorials that use turtle. Why do this if
it does not give any substantial benefits? Finally, 'import turtle' is
easier than 'from tkinter import turtle' for complete newbies in
programming, who are the primary users of this module.
So I propose to keep turtle a top-level module as it was in Python 1 and 2.

Unfortunately, as we are approaching 3.0rc1, it is too late to make a
change like this. I'm assigning this to Brett if he has an opinion, but
I don't expect this change to be able to happen.

As Benjamin said, it's too late in the release cycle to change this.
Plus turtle is entirely Tk-dependent so putting in the package makes
sense to me. It also isn't important enough to be a top-level package.
Finally, I disagree that telling a newbie to type ``from tkinter import
turtle`` is any more difficult than to tell them to type ``import
tkinter``; if they don't know about importing then either form won't
make sense to them.

I'd like to appeal that decision. That the turtle module is implemented
in Tkinter is, well, an implementation detail. What matters to the end
user is the turtle API, which has little to do with Tkinter (at least,
the most high-level API doesn't).
I think it is a mistake to have the module in the tkinter package, hence
I marked this bug release-critical, and would like to ask that this is
reconsidered before rc2 (clearly, when 3.0 is released, this mistake
cannot be corrected easily anymore).
In considering this issue, please understand the target audience of the
turtle module: children that just learn programming. I completely agree
with Kirill (and also with Gregor Lingl, who complained about this also,
but didn't follow up). For these people, stability of documentation is
much more important than for trained programmers: when they get an
import error, they consider all kinds of problems (such as them having
mistyped things, or the computer being broken and the module being
missing); the real cause (arbitrary renaming) doesn't come to their mind
as the first thing.
Attached is a patch that has the necessary changes.
Guido, would you be willing to pronounce?

Agreed. It's toplevel in 2.6. Let's keep it toplevel in 3.x.

This is now fixed in r66531.

Docs done in r66534.

Of course I highly appreciate this decision.
I'd like to point you to an urgent issue concerning turtle.py
which needs a decision and which I've just posted to Python-dev
Regards,
Gregor

Thank you for the fix, I really appeciate it.