Python 3.4.4 (v3.4.4:737efcadf5a6, Dec 20 2015, 19:28:18) [MSC v.1600 32 bit (Intel)] on win32
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>>> l=[1,4,6,9,4,6,2,3,0,1]
>>> len(l)
10
>>> l.append(7)
>>> l
[1, 4, 6, 9, 4, 6, 2, 3, 0, 1, 7]
>>> l.sort()
>>> l
[0, 1, 1, 2, 3, 4, 4, 6, 6, 7, 9]
>>> l.reverse()
>>> l
[9, 7, 6, 6, 4, 4, 3, 2, 1, 1, 0]
>>> l.pop()
0
>>> l.pop(6)
3
>>> l
[9, 7, 6, 6, 4, 4, 2, 1, 1]
>>> l.append(3)
>>> l
[9, 7, 6, 6, 4, 4, 2, 1, 1, 3]
>>> l.index(6,4)
Traceback (most recent call last):
  File "<pyshell#13>", line 1, in <module>
    l.index(6,4)
ValueError: 6 is not in list
>>> l.index(1,4)
7
>>> set(l)
{1, 2, 3, 4, 6, 7, 9}
>>> l
[9, 7, 6, 6, 4, 4, 2, 1, 1, 3]
>>>