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.

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import a

// do something with a.Amode

// do something with a.Format

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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.

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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".