suppose I have a list
a = [1,2,4,5]
I want to create another list b which clones a and adds it 3 times. So b is expected to be
b = [1,2,4,5,1,2,4,5,1,2,4,5]
How do I do this easily? Methods using pandas or numpy is also welcome.
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martineau
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1The * operator works on lists, but only if they are primitives. – Mous Feb 28 '22 at 23:26
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2`b = 3 * a` works for this – khelwood Feb 28 '22 at 23:28
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1@Mous no, it *always* works and Python doesn't have "primitives". – juanpa.arrivillaga Mar 01 '22 at 00:26
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@juanpa.arrivillaga it will duplicate objects. This behaviour can lead to bugs, which is why I don't recommend it. – Mous Mar 01 '22 at 04:41
