Those things return generators now to avoid wasting memory (you don't need to create possibly humongous list and keep it in memory during the iteration). If you want a list, just do list(your expression). If you forgot about it then do: list(_) as the very next thing. Like this:

>>> map(lambda x: x*x, range(1,10))

<map object at 0x02DDDB90>

>>> list(_)

[1, 4, 9, 16, 25, 36, 49, 64, 81]

Wtp ?