[issue10544] yield expression inside generator expression does nothing

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

Also see https://bugs.python.org/issue1660500 for the original Python 3.0 change to hide the iteration variable.

While the test suite already covers some interesting scoping edge cases as result of that initial patch, I think one we're currently missing is the nested comprehension case:

    >>> [[x for x in range(1, i)] for i in range(2, 5)]
    [[1], [1, 2], [1, 2, 3]]

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