Dear Maintainer,

On Debian 13 (trixie), running:

    python3 -m pip check

reports:

    apt-listchanges 4.8 requires debconf, which is not installed.

However, debconf and python3-debconf are both correctly installed:

    apt-listchanges: install ok installed 4.8
    debconf: install ok installed 1.5.91
    python3-debconf: install ok installed 1.5.91

The Python debconf module is also present and imports successfully:

    python3 -c 'import debconf; print(debconf.__file__)'

Output:

    /usr/lib/python3/dist-packages/debconf.py

In addition:

    sudo apt-get check

completes successfully without reporting broken Debian package dependencies.

The apparent cause is the Python package metadata of apt-listchanges.
apt-listchanges declares debconf as a Python distribution dependency, but
debconf is provided by Debian and is not installed as a normal PyPI
distribution with metadata that pip recognizes.

As a result, pip check reports debconf as missing even though the Debian
package and Python module are correctly installed.

Expected result:
pip check should not report debconf as missing when the Debian dependency
is correctly satisfied.

Actual result:
pip check reports:

    apt-listchanges 4.8 requires debconf, which is not installed.

Please consider adjusting the Python dependency metadata so that the
Debian-specific debconf dependency does not cause this false-positive
pip check result.

No local modifications have been made to the Debian Python packages or
their metadata.