lists = [1, 2, 3] lists.insert(2, [7,8,9]) print(lists)
[1,2,3,7,8,9]
[1,2,3,[7,8,9]]
[1,2,[7,8,9],3]
[1,2,7,8,9,3]
lists[2:2] = [7, 8, 9]
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