I looked up "list comprehension" after the last explanation and it's really cool. But the example below stumps me. I understand the second part, "primes =" but the first part, "noprimes =" baffles me since it swaps i and j back and forth in what looks like a circle ;') Also, the other examples I looked at had a function of 'x' before the 'for,' and 'x' after, so they were easy to follow. But this example has 'j' as a function of 'i,' then 'i,' as a function of 'j' and has me dizzy.
Could someone show this in normal, indented 'for' loops so I can see what 'for' goes where and how it works. I figure if I figure this one one I'll really comprehend list comprehension. # find nonprimes up to 50, then filter out what's left as primes noprimes = [j for i in range(2, 8) for j in range(i*2, 50, i)] primes = [x for x in range(2, 50) if x not in noprimes] -- Jim Mooney “For anything that matters, the timing is never quite right, the resources are always a little short, and the people who affect the outcome are always ambivalent.” _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
