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Bug 1817661 - osc fails to build with Python 3.9: cannot import name 'cElementTree' from 'xml.etree'
Summary: osc fails to build with Python 3.9: cannot import name 'cElementTree' from 'x...
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: osc
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Haïkel Guémar
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: F33FTBFS PYTHON39
TreeView+ depends on / blocked
 
Reported: 2020-03-26 18:10 UTC by Miro Hrončok
Modified: 2020-06-02 20:41 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2020-06-02 20:41:56 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Miro Hrončok 2020-03-26 18:10:39 UTC 
osc fails to build with Python 3.9.0a5.

Traceback (most recent call last):
  File "/builddir/build/BUILD/osc-0.167.1/osc/core.py", line 52, in <module>
    from xml.etree import cElementTree as ET
ImportError: cannot import name 'cElementTree' from 'xml.etree' (/usr/lib64/python3.9/xml/etree/__init__.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/builddir/build/BUILD/osc-0.167.1/setup.py", line 7, in <module>
    import osc.core
  File "/builddir/build/BUILD/osc-0.167.1/osc/core.py", line 54, in <module>
    import cElementTree as ET
ModuleNotFoundError: No module named 'cElementTree'

See https://docs.python.org/3.9/whatsnew/3.9.html#removed

"The xml.etree.cElementTree module has been removed."


For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.9/fedora-rawhide-x86_64/01321069-osc/

For all our attempts to build osc with Python 3.9, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/package/osc/

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 3.9:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/

Let us know here if you have any questions.

Python 3.9 will be included in Fedora 33. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.9.
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 Miro Hrončok 2020-05-25 13:01:16 UTC 
This comment is mass posted to all bugs blocking the Python 3.9 tracker, sorry if it is not 100 % relevant. When in doubt, please ask.


The Python 3.9 rebuild is in progress in a Koji side tag.

If you fix this bug, please don't rebuild the package in regular rawhide, but do it in the side tag with:

    $ fedpkg build --target=f33-python

The rebuild is progressing slowly and it is possible this package won't have all the required build dependencies yet. If that's the case, please just leave the fix committed and pushed and we will eventually rebuild it for you.

You are not asked to go and try rebuild all the missing dependencies yourself. If you know there is a bootstrap loop in the dependencies, let me know and we can untangle it together.

If you want to test your fix or reproduce the failure, you can still use the Copr repo mentioned in the initial comment of this bug: https://copr.fedorainfracloud.org/coprs/g/python/python3.9/
Comment 2 Miro Hrončok 2020-05-29 07:11:22 UTC 
Python 3.9 update: The f33-python side tag is currently being merged.

New builds in f33-python are no longer possible, but python3 is not yet updated to Python 3.9 in rawhide. You can check when Python is Python 3.9 with:

    $ koji wait-repo f33-build --build python3.9-3.9.0~b1-3.fc3

And build the packages normally after that.
Comment 3 Adam Williamson 2020-06-02 20:41:56 UTC 
Fixed: https://koji.fedoraproject.org/koji/taskinfo?taskID=45328637
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