The tag is present in Lintian version 2.109.3. That is the most recent version we know about.
The given package appears to have a Python development package
pythonX.Y-dev) listed in its
Build-Depends-Indep fields, but only
packages are built by this source package. Python applications and modules
do not usually require those dev packages, so you should consider removing
them in favour of
If you are building a Python extension instead, you should have
development packages listed in
Build-Depends, but normally there should
be at least one
Architecture: any package.