Bug#1089968: pyzo: python3-qtpy dropping dependency on PyQt5; Dependencies need updating

[jdg at debian.org]

Package: pyzo
Version: 4.15.0-1
Severity: important
User: python3-qtpy at packages.debian.org
Usertags: drop-qt5
Control: block 1070215 by -1

Dear Maintainer,

Your binary package pyzo currently Depends on python3-qtpy.

The upstream qtpy package is intended to be a metapackage, able to
work with any of PyQt5, PyQt6, PySide2 or PySide6 as the Qt backend.
Until now, the Debian python3-qtpy package has Depended on PyQt5, but
that is about to change.  From version 2.4.2-3 of python3-qtpy
(currently in experimental), it no longer Depends on any Qt backend,
so these will need to be explicitly listed in the package's Depends
field.  To help, there are also new metapackages python3-qtpy-pyqt5,
python3-qtpy-pyqt6 and python3-qtpy-pyside6 already in testing that
depend on python3-qtpy and the respective Qt backend.

Action required: update the Depends field to depend on the required Qt
backend packages.

Approach 1 (the "best" approach):

Identify the Python backend packages required and add these to
Depends.  (These dependencies could be PyQt5 dependencies, but they
could equally be PyQt6 or PySide6 dependencies.)

Approach 2 (should work in all cases, but will pull in more than needed):

Add python3-qtpy-pyqt5 as an explicit dependency to the Depends field,
or replace the python3-qtpy dependency with python3-qtpy-pyqt5 (as the
latter Depends on python3-qtpy).  This will exactly replicate the
current behaviour.


Before uploading a new version of your package to close this bug,
please do both build and test it using python3-qtpy 2.4.2-3 from
experimental.


I intend to upload python-qtpy 2.4.2-4 to unstable with this change in
mid-to-late January.  I will do an NMU or team upload if required for
this bug from mid-January.

For a background on the reason for this change, please see
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1070215

Best wishes,

   Julian