[_ZeD_]

or you could just be eager and use lists:

    >>> [[(i, j) for i in "abc"] for j in range(3)]
    [[('a', 0), ('b', 0), ('c', 0)], [('a', 1), ('b', 1), ('c', 1)], [('a', 2), ('b', 2), ('c', 2)]]

[nerdponx]

Right, creating generators in a loop is not usually something you want to do, but it's meant to demonstrate the complexity that arises from late binding rather than demonstrate something you would actually want to do in a real program.