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Bug 1926610 - python-pypet fails to build with Python 3.10: ImportError: cannot import name 'Sequence' from 'collections'
Summary: python-pypet fails to build with Python 3.10: ImportError: cannot import name...
Alias: None
Product: Fedora
Classification: Fedora
Component: python-pypet
Version: rawhide
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Ankur Sinha (FranciscoD)
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: PYTHON3.10
TreeView+ depends on / blocked
Reported: 2021-02-09 08:16 UTC by Tomáš Hrnčiar
Modified: 2021-05-22 15:55 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2021-05-22 15:55:58 UTC
Type: Bug

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Github SmokinCaterpillar pypet pull 62 0 None open fix(py3.10): correct collections related imports 2021-05-22 15:55:54 UTC

Description Tomáš Hrnčiar 2021-02-09 08:16:09 UTC
python-pypet fails to build with Python 3.10.0a5.

Traceback (most recent call last):
  File "/builddir/build/BUILD/pypet-0.5.0/pypet/tests/", line 4, in <module>
    from pypet.tests.testutils.ioutils import run_suite, TEST_IMPORT_ERROR, discover_tests, \
  File "/builddir/build/BUILDROOT/python-pypet-0.5.0-4.fc34.x86_64/usr/lib/python3.10/site-packages/pypet/", line 13, in <module>
    from pypet.environment import Environment, MultiprocContext
  File "/builddir/build/BUILDROOT/python-pypet-0.5.0-4.fc34.x86_64/usr/lib/python3.10/site-packages/pypet/", line 69, in <module>
    from pypet.trajectory import Trajectory
  File "/builddir/build/BUILDROOT/python-pypet-0.5.0-4.fc34.x86_64/usr/lib/python3.10/site-packages/pypet/", line 25, in <module>
    from pypet.parameter import BaseParameter, Parameter, Result
  File "/builddir/build/BUILDROOT/python-pypet-0.5.0-4.fc34.x86_64/usr/lib/python3.10/site-packages/pypet/", line 75, in <module>
    import pypet.utils.comparisons as comparisons
  File "/builddir/build/BUILDROOT/python-pypet-0.5.0-4.fc34.x86_64/usr/lib/python3.10/site-packages/pypet/utils/", line 5, in <module>
    from collections import Sequence, Mapping
ImportError: cannot import name 'Sequence' from 'collections' (/usr/lib64/python3.10/collections/

The deprecated aliases to Collections Abstract Base Classes were removed from the collections module.

For the build logs, see:

For all our attempts to build python-pypet with Python 3.10, see:

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.10:

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.

Comment 1 Ben Cotton 2021-02-09 16:08:31 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 34 development cycle.
Changing version to 34.

Comment 2 Ankur Sinha (FranciscoD) 2021-05-22 15:55:58 UTC
Fixed, built. Please re-open if required.

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