List concatenation: speed : List Cancatenation « List « Python

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Python » List » List Cancatenation Screenshots  List concatenation: speed   L = [1, 2] L = L + [3]            # concatenate: slower print L L.append(4)            # faster, but in-place print L L = L + [5, 6]         # concatenate: slower print L L.extend([7, 8])       # faster, but in-place print L L += [9, 10]       # mapped to L.extend([9, 10]) print L                          Related examples in the same category 1.  Using List Operators 2.  Concatenation ( + ) 3.  Concatinate two lists 4.  List concatenation Demo