Bug#896223: python-libavg: libavg fails to import

[Helmut Grohne]

Package: python-libavg
Version: 1.8.2-1
Severity: serious
User: helmutg at debian.org
Usertags: python-import

After installing python-libavg importing the module libavg
into a python interpreter fails with the following error:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/libavg/__init__.py", line 15, in <module>
    from avg import *
RuntimeError: No available video device

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