Question

I’m looking into organizing my modules and classes. All the time I collect my related classes in a relevant module so I can do things like:

from vehicles.car import engine

In directory vehicles there is a file named car which contains class engine. Clear.

Now I’m looking into the possibility that I can store a class in a file. So I can do something like:

from filters import air

and the air class is a file on its own. However it’s not clear to me how I can have a class named air which is stored into its own file called air.py

If filters.py contained all my classes then this import would work, but that’s not what I want.

Any tips or pointers?

Answer 1

Create a directory called filters, and files filters/__init__.py and filters/air.py.

In filters/__init__.py, have: from air import air, and in filters/air.py, define the class air.

Then:

$ python
Python 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24) 
[GCC 4.5.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from filters import air
>>> air
<class 'filters.air.air'>
>>>