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Bug 1958890 - pygobject3 with Python 3.10: ImportWarning: DynamicImporter.find_spec() not found; falling back to find_module()
Summary: pygobject3 with Python 3.10: ImportWarning: DynamicImporter.find_spec() not f...
Alias: None
Product: Fedora
Classification: Fedora
Component: pygobject3
Version: rawhide
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Colin Walters
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: PYTHON3.10 1958886
TreeView+ depends on / blocked
Reported: 2021-05-10 11:33 UTC by Miro Hrončok
Modified: 2021-06-04 20:28 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2021-06-04 20:28:19 UTC
Type: Bug

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
GNOME Gitlab GNOME/pygobject - issues 473 0 None None None 2021-05-18 10:25:09 UTC
GNOME Gitlab GNOME/pygobject - merge_requests 174 0 None None None 2021-05-18 10:59:28 UTC

Description Miro Hrončok 2021-05-10 11:33:17 UTC
Hello. pygobject3 emits an ImportWarning with Pyuthon 3.10.0b1+

ImportWarning: DynamicImporter.find_spec() not found; falling back to find_module()

"""Starting in this release, there will be a concerted effort to begin cleaning up old import semantics that were kept for Python 2.7 compatibility. Specifically, find_loader()/find_module() (superseded by find_spec()), load_module() (superseded by exec_module()), module_repr() (which the import system takes care of for you), the __package__ attribute (superseded by __spec__.parent), the __loader__ attribute (superseded by __spec__.loader), and the __cached__ attribute (superseded by __spec__.cached) will slowly be removed (as well as other classes and methods in importlib). ImportWarning and/or DeprecationWarning will be raised as appropriate to help identify code which needs updating during this transition."""

See bz1958886 for build logs of matplotlib affected by this problem.

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 3 Miro Hrončok 2021-06-04 20:15:09 UTC
This is a mass-posted update. Sorry if it is not 100% accurate to this bugzilla.

The Python 3.10 rebuild is in progress in a Koji side tag. If you manage to fix the problem, please commit the fix in the rawhide branch, but don't build the package in regular rawhide.

You can either build the package in the side tag, with:

    $ fedpkg build --target=f35-python

Or you can the build and we will eventually build it for you.

Note that the rebuild is still in progress, so not all (build) dependencies of this package might be available right away.


See also

If you have general questions about the rebuild, please use this mailing list thread:

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