I want the iterator to move the opposite way, which it moves from the biggest value to the smallest value. How can I do achieve this? I have to give up this convenient way?
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iterating over a list from end to start? – Wasi Ahmad Feb 14 '17 at 02:33
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What are you talking about? Please give some example code! – Klaus D. Feb 14 '17 at 02:34
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I guess the same question here http://stackoverflow.com/questions/529424/traverse-a-list-in-reverse-order-in-python – Roman Fursenko Feb 14 '17 at 02:35
2 Answers
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If you're talking about a for loop, you can do
for i in range(start, end, counter)
so if you wanted to iterate from 10 to 0, you would do
for i in range(10, -1, -1)
Remember that the end in the for loop is exclusive.
JGut
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Most iterables can be traversed in reverse by using the slice mechanism [::-1].
s = "asdf"
for c in s[::-1]:
print c
l = range(5):
for i in l[::-1]:
print i
Logan Byers
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