Q: organizing classes in modules

Stephan Reiling sreiling at elara.tripos.com
Tue Mar 21 16:27:10 CET 2000


I have a question about how to organize classes in modules:
I would like to organize my classes so that every class has its own file, the
file having the same name as the class, e.g.
In file Class1.py
    class Class1:
        ...

I would also like to put these into a module, for example module1. When I now
want to use Class1, I would like to just say:

import module1
c=module1.Class1()

instead I have to say:

import module1
c=module1.Class1.Class1()

I have quite a few of these classes, so this gets annoying after a while.
I looked into what I can do in the __init__.py file of the module. The only
thing I could figure out was to put something like the following there:

from Class1 import *
from Class2 import *
...

Which according to what I have read is not a good idea, and also seems to
increase startup time.
(And what happens if Class1 and Class2 cross-reference each other, or one of my
classes has to be a singleton)

So the question is:
How can I do this? Obviously I am trying to organize my code in a way like C++
and java do it. Right now I have around 30 classes distributed over 6 modules
and sub-modules and I expect the number of classes to grow.

Thanks,
    Stephan
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