python List有关append&extend

>>> mylist = [‘a‘, ‘b‘]
>>> mylist.append([‘c‘,‘d‘])
>>> mylist
[‘a‘, ‘b‘, [‘c‘, ‘d‘]]
>>> mylist.extend([‘e‘,‘f‘])
>>> mylist
[‘a‘, ‘b‘, [‘c‘, ‘d‘], ‘e‘, ‘f‘]

>>> mylist.index(‘b‘)
1
>>> mylist.index([‘c‘,‘d‘])
2

List运算中的 + 和 *
>>> mylist
[‘a‘, ‘b‘, [‘c‘, ‘d‘], ‘e‘, ‘f‘]
>>> mylist = mylist + [‘g‘,‘h‘]
>>> mylist
[‘a‘, ‘b‘, [‘c‘, ‘d‘], ‘e‘, ‘f‘, ‘g‘, ‘h‘]
>>> mylist += [‘i‘]
>>> mylist
[‘a‘, ‘b‘, [‘c‘, ‘d‘], ‘e‘, ‘f‘, ‘g‘, ‘h‘, ‘i‘]
>>> yourlist = [‘1‘,‘2‘,‘3‘]
>>> yourlist = yourlist * 3
>>> yourlist
[‘1‘, ‘2‘, ‘3‘, ‘1‘, ‘2‘, ‘3‘, ‘1‘, ‘2‘, ‘3‘]
>>>