In [19]: c=['a','b','c','a','b','a','d']
In [20]: c.count(1)
Out[20]: 0
In [21]: c.count('a')
Out[21]: 3
In [22]: c.count('b')
Out[22]: 2
In [23]: c.index('b')
Out[23]: 1
In [28]: c.insert(2,0)
In [29]: c
Out[29]: ['a', 'b', 0, 'c', 'a', 'b', 'a', 'd']
In [31]: c.remove(0)
In [32]: c
Out[32]: ['a', 'b', 'c', 'a', 'b', 'a', 'd']
In [33]: c.pop()
Out[33]: 'd'
In [34]: c
Out[34]: ['a', 'b', 'c', 'a', 'b', 'a']
In [35]: c.pop(1)
Out[35]: 'b'
In [36]: c
Out[36]: ['a', 'c', 'a', 'b', 'a']
In [37]: c.extend([1,2])
In [38]: c
Out[38]: ['a', 'c', 'a', 'b', 'a', 1, 2]
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