derived / base class name conflicts

[christopherlmarshall at yahoo.com]

Your suggestion ('_name' -> implementation, 'name' -> API) makes sense
as a convention between programmers that know a fair amount about each
other's classes before using them.

I don't think it is reasonable in general to only subclass from base
classes you have studied the full API of, however.  The double
underscore is a decent solution to my problem.

I imagine  it must be used a lot in domains where people are making
heavy use of third party python code.

Chris Marshall