While working on the transition adding Python 3.14 as a supported
version [1], I noticed that python-charset-normalizer is on dependency
level 1, but it has a build dependency on mypy which is on dependency
level 5.
python-charset-normalizer's debian/control contains:
Build-Depends:
...
python3-mypy:native,
However, this change was fairly recent [2]. I had previously worked
on a test rebuild with a release candidate of Python 3.14, and
according to my notes, python-charset-normalizer appeared on level 5
at that time.