[Tutor] Global var problem

[w chun]

> if __name__ == '__main__':
>         global x
>         x = 1
>         t = T()
>         t.p()


as alan mentioned, it's all about namespaces.  the "global x" you have
in the above piece of code doesn't do anything (because you're already
or still in the global [name]space).

you're getting the error in your p() method because there is an
assignment to x in there.  when that happens, it's part of p's local
namespace.  during compilation, the interpreter sees this creation of
a local name, but because you access it before you assign it, i.e., x
= x + 1, you get that error.

add your global request to p(), and you'll be fine:

        def p(self):
               global x
               x += 1
               print x

hope this helps!
-- wesley
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"Core Python Programming", Prentice Hall, (c)2006,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
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