How I can change element in array? I have this code, but I expected that it would print [[5,5],[1,4]]. But it wouldn't. It still prints [[1,2],[1,4]].
x = [[1,2], [1,4]] for element in x: if element[1] == 2: element = [5,5] print x 1 Answer
Change a list element requires an index.
list_object[index] = new_value Using enumerate, you can iterate the list and get a indexes.
>>> x = [[1,2], [1,4]] >>> for i, element in enumerate(x): ... if element[1] == 2: ... x[i] = [5,5] ... >>> x [[5, 5], [1, 4]] 
