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Sun Oct 26 12:11:51 EST 2003 · https://mail.python.org/pipermail/python-dev/2003-October/039597.html

    > Sounds good to me.  Question: what does this do?
    >
    >     def f():
    >         def g(x):
    >             z := x
       ...
    > That is, in the absence of a pre-existing binding, where does the
    > binding for := go?  I think it should be equivalent to global, going to
    > the module scope.

This is one place I think an extension of the global statement has a
definite advantage:

    def f():
        def g():
            global z in f
            z = x

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[Python-Dev] replacing 'global'