"Reid Priedhorsky" <[EMAIL PROTECTED]> wrote:
> Dear group,
>
> I'd have a class defined in one module, which descends from another class
> defined in a different module. I'd like the superclass to be able to
> access objects defined in the first module (given an instance of the first
> class) without importing it. Example of what I'm looking for:
>
> <<<file spam.py>>>
>
> class Spam(object):
> def fish(self):
> a = self.__module__.Ham()
>
> <<<file eggs.py>>>
>
> import spam
>
> class Eggs(spam.Spam):
> pass
>
> class Ham(object):
> pass
>
> The above doesn't work because __module__ is a string, not a module object:
>
> >>> import eggs
> >>> b = eggs.Eggs()
> >>> b.fish()
> Traceback (most recent call last):
> File "<stdin>", line 1, in ?
> File "spam.py", line 3, in foo
> a = self.__module__.Ham()
> AttributeError: 'str' object has no attribute 'Ham'
>
> (I suppose I could call __import__(self.__module__), but that seems kind
> of awkward.)
>
> Is this possible using Python 2.3? Any better ways to accomplish this?
I don't know if it's "better", but since you know that self.__module__
has already been imported, you can access it through the sys.modules
dict:
a = sys.modules[self.__module__].Ham()
By the way, this seems like an error-prone hack. Are you sure you want
to relate two independent classes just by the fact that they rely in
the same file ? Remember, explicit is better than implicit.
George
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