Question on class module import

[MRAB]

monkeyboy wrote:
> Hello,
> 
> I want to write a wrapper class around a windows dll. If I put the 
> class in a module "Refprop.py" then import the class where I want to 
> use it, does the whole module get read by the interpreter or just the
> class code?...
> 
[snip]
The whole module will be run.

In Python 'def' and 'class' aren't declarations, but statements, which
have the side-effect of creating the function or class and binding it to
a name in the enclosing namespace.

If a module contains:

     print "The start"

     class Foo():
         pass

     print "The finished"

and then you import it, it'll print "The Start", then create a class
called "Foo" within the module's namespace, then print "The end".