3.13 REPL will produce an error and a warning when being run

[Yzi-Li]

Bug report

Bug description:

When I try running 3.13 REPL, it will produce an error and a warning.

AttributeError: module 'collections' has no attribute 'Callable'
warning: can't use pyrepl: module 'collections' has no attribute 'Callable'

CPython versions tested on:

3.13

Operating systems tested on:

Windows

[skirpichev]

Can't reproduce this on Linux:

sk@note:~ $ python3.13
Python 3.13.1 (tags/v3.13.1:0671451779, Dec  4 2024, 07:55:26) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

Just in case, could you please specify how you "try running 3.13 REPL", what exactly you do? Did you run official build from https://www.python.org/downloads/windows/, maybe something else?

$ git status 
On branch 3.13
Your branch is up to date with 'upstream/3.13'.

nothing to commit, working tree clean

$ git grep collections Lib/_pyrepl/ Lib/code*
Lib/_pyrepl/input.py:from collections import deque
Lib/_pyrepl/readline.py:from collections.abc import Callable, Collection
Lib/_pyrepl/types.py:from collections.abc import Callable, Iterator
Lib/_pyrepl/unix_eventqueue.py:from collections import deque
Lib/_pyrepl/windows_console.py:from collections import deque

[picnixz]

Note: could it be that you have a local collections.py file as well which is then shadowing the standard library module? this happened to me a lot when I once created a logging.py file...

[terryjreedy]

When I run 3.13.2 on Windows 10 with py -3.13 in my home directory, which has no .py files, it runs fine. What did you do different?

What is puzzling about the quoted exception message is that it implies that you executed code that has import collections followed by collections.Callable, at which point the AttributeError was raised. Indeed, collections does not have that attribute. Abstract base classes like 'Callable' were moved from collections to collections.abc in 3.3 and their access from collections removed a few versions later. The expression collections.Callable has not be valid for several years and is not present anywhere in the distributed /Lib. Searching recursively with IDLE's grep for 'collections.Callable' in C:\Programs\Python313\Lib\*.py gave 'No hits.'

[picnixz]

In addition, what is the version of Python? is it 3.13.2 or is it an older 3.13? we recently changed how collections.abc is imported in collections. Finally, can you give us a reproducer? is it just when you run python3 or is when you run your own script?

[Yzi-Li]

I have identified the problem.
I installed pyreadline a few days ago.

pip install pyreadline

And it added:

...\python313\lib\site-packages\pyreadline-2.1.dist-info\*
...\python313\lib\site-packages\pyreadline\*
...\python313\lib\site-packages\readline.py

Note: could it be that you have a local collections.py file as well which is then shadowing the standard library module? this happened to me a lot when I once created a logging.py file...

As picnixz said, the local file is shadowing the standard library module.

[Yzi-Li]

Thanks for helping me solve this problem.I understand it now and will pay more attention in the future.

If there are no other problems, I will close this issue.