Source: pymol Version: 1.8.4.0+dfsg-1 Severity: important The pymol module is used by other packages and ships public modules that are in sys.path. That means that the public modules must be in the package python-pymol; the command line tools, menu items, icons, documentation can remain in the pymol package. This package split will make it easier to convert pymol to Python 3 at some stage in the future.
https://www.debian.org/doc/packaging-manuals/python-policy/module_packages.html#package_names "Public Python 2 modules used by other packages must have their binary package name prefixed with python-. It is recommended to use this prefix for all packages with public modules as they may be used by other packages in the future."

