List are Mutable


>>> x = [1, 2, 3, 4]

>>> x[1] = 5
>>> x
[1, 5, 3, 4]

>>> x[1:3] = [6,7,8]
>>> x
[1, 6, 7, 8, 4]

>>> del x[2:4]
>>> x
[1, 6, 4]