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Bug#1001244: circuits: needs update for python3.10: 'Callable' from 'collections' is removed

Source: circuits
Version: 3.1.0+ds1-2
Severity: serious
X-Debbugs-CC: debian-ci@lists.debian.org
Tags: sid bookworm
User: debian-ci@lists.debian.org
Usertags: needs-update
Control: affects -1 src:python3-defaults

Dear maintainer(s),

With a recent upload of python3-defaults the autopkgtest of circuits fails in testing when that autopkgtest is run with the binary packages of python3-defaults from unstable. It passes when run with only packages from testing. In tabular form:

                       pass            fail
python3-defaults       from testing    3.9.8-1
circuits               from testing    3.1.0+ds1-2
all others             from testing    from testing

I copied some of the output at the bottom of this report. https://docs.python.org/3.9/library/collections.html says:
Deprecated since version 3.3, will be removed in version 3.10: Moved Collections Abstract Base Classes to the collections.abc module. For backwards compatibility, they continue to be visible in this module through Python 3.9.
Time to move on.

Currently this regression is blocking the migration of python3-defaults to testing [1].

More information about this bug and the reason for filing it can be found on


[1] https://qa.debian.org/excuses.php?package=python3-defaults


Testing with python3.10:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
File "/usr/lib/python3/dist-packages/circuits/__init__.py", line 22, in <module>
    from .core import Event
File "/usr/lib/python3/dist-packages/circuits/core/__init__.py", line 12, in <module>
    from .bridge import Bridge
File "/usr/lib/python3/dist-packages/circuits/core/bridge.py", line 23, in <module>
    from .handlers import handler
File "/usr/lib/python3/dist-packages/circuits/core/handlers.py", line 10, in <module>
    from collections import Callable
ImportError: cannot import name 'Callable' from 'collections' (/usr/lib/python3.10/collections/__init__.py)
autopkgtest [19:10:21]: test autodep8-python3

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