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interaction between modules... globals?

Robin Becker robin at jessikat.demon.co.uk
Wed Jul 7 08:45:03 EDT 1999 
In article <19990707100532.A951 at optiplex.palga.uucp>, Gerrit Holl
<gerrit.holl at pobox.com> writes
>Hello,
>
>I have a program which consists of several little modules, but I encounter a
>problem with that. I have one module which returns a class instance, with
>messages as members, either Dutch or English. Every module needs that instance,
>but I don't want to pass it as an argument to every little function, the
>modules should find out theirselves. But I _also_ don't want to make that
>instance 5 times.
>
>So I thougt: I need a sort of global between the modules. Is this possible?
>
...
>regards,
>Gerrit.
>
I guess you need a singleton class. There was a c.l.p thread about this
recently.

I suggest something of the form

_LangGlobal=None

def getMessages():
        global _LangGlobal
        if _LangGlobal is None:
                # calculate which language
                #...
                #...
                _LangGlobal=result
        return _LangGlobal

-- 
Robin Becker
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