A global or module-level variable?

[Bret]

This has to be easier than I'm making it....

I've got a module, remote.py, which contains a number of classes, all
of whom open a port for communication.  I'd like to have a way to
coordinate these port numbers akin to this:

So I have this in the __init__.py file for a package called cstore:

nextport=42000

def getNextPort():
    nextport += 1
    return nextport

:
Then, in the class where I wish to use this (in cstore.remote.py):
:


class Spam():

    def __init__(self, **kwargs):
        self._port = cstore.getNextPort()

I can't seem to make this work, though.  As given here, I get an
"UnboundLocalError:local variable 'nextport' referenced before
assignment".  When I try prefixing the names inside __init__.py with
"cstore.", I get an error that the global name "cstore" is not
defined.

I've been looking at this long enough that my eyes are blurring.  Any
ideas?

BTW, the driving force here is that I'm going to need to wrap this in
some thread synchronization.  For now, though, I'm just trying to get
the basics working.

Thanks!


Bret