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Sun Jul 2 16:07:57 CEST 2006 · https://mail.python.org/pipermail/python-dev/2006-July/066939.html

At 01:58 PM 7/2/2006 +0200, jan-python at maka.demon.nl wrote:
>I believe the problem has nothing to do with how many scopes a block/function
>definition has, but with what the lambda does with the scope it's given.
>Currently it remembers the block and looks up the nescessary variables in it
>when it's invoked. I think it shoud should have just taken the values of the
>needed variables and rememberd those as it's own local variables. So
>the closed
>over variables become just local variables initialised to the value
>they have in
>the outer scope.

That won't work.  Consider this code, that's perfectly valid Python today:

    def foo():
        def bar():
            print x
        for x in range(10):
            bar()

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