Python list of lists

I just stumbled upon a post/problem in stackoverflow. Here I discuss it and the solution.First check the following code segment : >>>visited = [[False]*4]*4>>>visited[0][1] = True>>>print visited>>> [[False, True, False, False], [False, True, False, False], [False, True, False, False], [False, True, False, False]]Do you see the problem, second element of all the list changed to True! So it means [[False]*4]*4 creates a list that contains reference to the same list [False, False, False,... Original Source

https://codango.com/python-list-of-lists/

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