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How does this function work?

def f(y): ... return [x for x in range(3), 1, y for y in range(4), 4]
... f(3) [[0, 1, 2], [0, 1, 2], 1, 1, 3, 3]


I've been staring at it for 15 minutes and I'm no closer to understanding than when I started.

Why is this even legal Python syntax? What is going on that makes it return what it does?

Jp
Jul 18 '05 #1
0 981

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