[issue7423] nested generator expression produces strange results

[Benjamin Peterson]

Benjamin Peterson <benjamin at python.org> added the comment:

By using a generator expression, you are deferring evaluation of the
expression until map() is actually invoked. By that time, the closure
over 'x' has been changed to 'b', so when the genexp is forced, 'x'
yields 'b' each time.

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nosy: +benjamin.peterson
resolution:  -> invalid
status: open -> closed

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<http://bugs.python.org/issue7423>
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