r3c.zml: depends on python-pypdf, which is removed and superseded by python-pypdf2
The z3c.rml package depends on the PyPdf module, provided by the python-pypdf package. This package is obsolete and removed from Debian unstable; and I've also just removed it from zesty. This makes python-z3c.rml uninstallable.
I was going to fix z3c.rml up thinking it would be a quick fix, but:
- the module name has changed, someone will need to check that s/PyPdf/PyPdf2/ is enough to let the code work.
- z3c.rml relies on van.pydeb for generating its binary dependency list, so that would also need updated to know about PyPdf2.
You could also just hard-code the dependency in debian/control instead of relying on van.pydeb's behavior.
This is an Ubuntu-specific package that hasn't been updated in 4 years, so it's possible it should be removed rather than being fixed. But it's used by schooltool, so someone would need to look at that first.