b=[3,4,5,6,7,8,9,10,11]
>>> b
[3, 4, 5, 6, 7, 8, 9, 10, 11]
>>> b=[1:4]
SyntaxError: invalid syntax
>>> b[1:4]
[4, 5, 6]
>>>
>>> b[2:-1]
[5, 6, 7, 8, 9, 10]
>>> b[2:999]
[5, 6, 7, 8, 9, 10, 11]
>>> b[2:]
[5, 6, 7, 8, 9, 10, 11]
>>> b[-1:]
[11]
>>> b[:2]
[3, 4]
>>> b[:]
[3, 4, 5, 6, 7, 8, 9, 10, 11]
>>> b[::2]
[3, 5, 7, 9, 11]
>>> b[::3]
[3, 6, 9]
>>> b[::4]
[3, 7, 11]
>>> b[::5]
[3, 8]
>>> b[::6]
[3, 9]
>>> b[::8]
[3, 11]
>>> b[::9]
[3]
>>> b[::10]
[3]
>>> b[::11]
[3]
>>> b[::2]
[3, 5, 7, 9, 11]
>>> b[1::2]
[4, 6, 8, 10]
>>> b[3:7:3]
[6, 9]
>>> b[::-1]
[11, 10, 9, 8, 7, 6, 5, 4, 3]
>>> b[::-2]
[11, 9, 7, 5, 3]
>>> b[2]
5
>>> b[2]=100
>>> b
[3, 4, 100, 6, 7, 8, 9, 10, 11]
>>> b[2:5]=23,34
>>> b
[3, 4, 23, 34, 8, 9, 10, 11]
>>> b[3:5]=34,23
>>> b
[3, 4, 23, 34, 23, 9, 10, 11]
>>> b[2:5]=23,34
>>> b
[3, 4, 23, 34, 9, 10, 11]
>>>