Public bug reported:
python3-sigima 1.1.1-1 in stonking is empty: the deb only contains
/usr/share/doc (2.5 kB), no Python module. This breaks datalab 1.1.0-5
(new package, stuck in stonking-proposed), whose tests fail with:
datalab/tests/__init__.py:33: in <module>
from sigima.tests import helpers
E ModuleNotFoundError: No module named 'sigima'
https://launchpadlibrarian.net/880899862/buildlog_ubuntu-stonking-
amd64.datalab_1.1.0-5_BUILDING.txt.gz
Cause: debian/rules has
export PYBUILD_DISABLE=python3.14
Python 3.14 is the only supported Python version, so pybuild builds and
installs nothing, and the build still "succeeds" (dpkg-gencontrol even warns
that ${python3:Depends} isn't defined):
https://launchpad.net/ubuntu/+source/python-sigima/1.1.1-1/+build/32900991
Debian's 1.1.1-1 binary has the module only because it was built in
March 2026, when Python 3.13 was still supported there; a rebuild in
Debian today would produce the same empty package.
Fix (1.1.1-1ubuntu1, test-built in a stonking chroot):
- drop PYBUILD_DISABLE=python3.14
- build-depend on python3-pyqt5.qtsvg <!nocheck>, needed by
test_matplotlib_backend_has_all_plotpy_functions (the only failing test without
it)
Result: 682 tests passed, 24 skipped; python3-sigima contains the sigima
module (312 files) with proper dependencies, and "from sigima.tests
import helpers" works. After it migrates, datalab needs a build retry.
** Affects: datalab (Ubuntu)
Importance: Undecided
Status: New
** Affects: python-sigima (Ubuntu)
Importance: Undecided
Status: New
** Tags: ftbfs update-excuse
** Tags added: update-excuse
** Tags added: ftbfs
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https://bugs.launchpad.net/bugs/2170776
Title:
python3-sigima is empty: PYBUILD_DISABLE=python3.14 disables the only
supported Python (breaks datalab)
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