Sharing variables acoss several python files

I have tasked to modify a wx python gui based program which has several .py files. I would like to share some variables defined in a.py and use them in b.py The 10 -15 variables are of this form:

 Amode = [SINGLE]
 Format = [A] etc...

I would like to use them in b.py. How do I go about it? I read about Pickle but still not clear how to use it w开发者_如何学Goell.

import a

// do something with a.Amode

// do something with a.Format

Generally, the best idea, in this case, is to either place the variables on the module directly or use some shared dataStore. I like the Borg pattern for this.

Basically do this:

#in borg.py
class Borg:
    __shared_state = {}
    def __init__(self):
        self.__dict__ = self.__shared_state

Everywhere else:

import borg
drone = borg.Borg()
drone.foo = 1;

Obviously, you can limit this by defining __set__.

As to placing variables on modules directly, well, I'm not really a fan of having stateful variables publicly accessible on modules, but that is probably mostly me.

Modules are singletons (no matter how many times it's imported, it's only actually imported once, and that once is shared), so what I often do for this use case is to create a modules named, say, "shared.py", and put the data I want shared across other modules in it. Then, in those other modules:

import shared
# Use a shared variable/object
print shared.Amode
# Changes to the shared data are seen in all modules where it's imported.
shared.Amode = aNewValue

This has the nice effect of keeping all my shared data in its own namespace, "shared".