Given a class C in Python, how can I determine which file the class was defined in? I need something that can work from either the class C, or from an instance off C.
The reason I am doing this, is because I am generally a fan off putting files that belong together in the same folder. I want to create a class that uses a Django template to render itself as HTML. The base implementation should infer the filename for the template based on the filename that the class is defined in.
Say I put a class LocationArtifact in the file "base/artifacts.py", then I want the default behaviour to be that the template name is "base/LocationArtifact.html".
This is the wrong approach for Django and really forcing things.
The typical Django app pattern is:

/project

/appname

models.py
views.py
/templates

index.html
etc.
How do I get the filepath for a class in Python?