Bug#566039: canto: does not byte-compile Python files
Your package does not byte-compile Python files. This task is usually
done by python-support or python-central, which also take care to
move files to the right location.
In order to fix this bug, you should build-depend on python-support
or python-central and be sure to call corresponding dh_* helper
(dh_pysupport or dh_pycentral) in your rules file (if needed).
In case you already build-depend on python-support or python-central,
you need to look where your files are installed, and eventually patch
upstream build routines to let helpers byte-compile Python files.