[Python-modules-team] Bug#896395: python3-sphinxcontrib.rubydomain: sphinxcontrib.rubydomain fails to import

[Helmut Grohne]

Package: python3-sphinxcontrib.rubydomain
Version: 0.1~dev-20100804-1
Severity: serious
User: helmutg at debian.org
Usertags: python-import

After installing python3-sphinxcontrib.rubydomain importing the module sphinxcontrib.rubydomain
into a python interpreter fails with the following error:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/sphinxcontrib/rubydomain.py", line 23, in <module>
    from sphinx.util.compat import Directive
ImportError: cannot import name 'Directive'

The vast majority of import failures is attributed to missing dependencies.
Often times that manifests as an ImportError or ModuleNotFoundError.
Typically, dependencies should be inserted by dh-python via ${python:Depends}
or ${python3:Depends}. Thus a missing dependency can be caused by incomplete
install_requires in setup.py. Sometimes a missing dependency of a dependency
is the cause, in such cases this bug should be reassigned.

Helmut