python列表复习

Posted 2020-08-28

列表的切片

>>> name = list()
>>> name.extend(range(100))
>>> name
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]
>>> name[4:10]    #左闭右开

[4, 5, 6, 7, 8, 9]
>>> name[-2]
98
>>> name[-2:]
[98, 99]
>>> name[:5]
[0, 1, 2, 3, 4]
>>>

列表的索引

name.index()通过下标可以取出元素

name.append()列表追加

name.count()统计列表中相同元素的个数

name.reverse()列表反转

name.insert()通过下标插入列表指定位置  name.insert(10,‘hello‘)在10的下标插入hello字符串