I know that I can use something like
string[3:4] to get a substring in Python, but what does the 3
mean in somesequence[::3]?
Sunday 12 November 2017
syntax - What is :: (double colon) in Python when subscripting sequences?
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Answer
it means 'nothing for the first argument,
nothing for the second, and jump by three'. It gets every third item of the sequence
sliced.
slices is what you want. New in Python 2.3
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