列表
向列表添加元素
append()
number = [1 , 2 , 3 , 4 ,5]
number.append(9)
只能在最后添加一个参数
extend()
number.extend([8 , 10])
添加一个列表到另一个列表中
>>> yourlist
['A', 'E', 'G']
>>> mylist
[1, 7, 9, 11, 13, 15, 17, 19, 23]
>>> mylist.extend(yourlist)
>>> mylist
[1, 7, 9, 11, 13, 15, 17, 19, 23, 'A', 'E', 'G']
>>> yourlist
['A', 'E', 'G']
insert()
number.insert(1, 11)
在第二位插入11，可以在任何位置插入参数
删除列表元素
number.pop() #删除最后一个元素
number.pop(i) #删除任意一个元素
删除列表
del(number)
删除指定元素
del(number[i])
删除指定元素
number.remove(3)
修改指定元素
number[0] = 9
切片 顾头不顾尾
>>> mylist
[1, 7, 9, 13, 11, 15, 17, 19]
>>> mylist[1:4]
[7, 9, 13]
>>> mylist[0:2]
[1, 7]
>>> mylist[:3]
[1, 7, 9]
>>> mylist[:]
[1, 7, 9, 13, 11, 15, 17, 19]
>>> mylist[::2]
[1, 9, 11, 17]
>>> mylist[::3]
[1, 13, 17]
>>> mylist[0:-7]
[1]
>>> mylist[-7:-5]
[7, 9]
获取下标
>>> mylist.index(13)
3
>>> print(mylist.index(9))
2
反转
>>> mylist
[1, 7, 9, 13, 11, 15, 17, 19]
>>> mylist.reverse()
>>> mylist
[19, 17, 15, 11, 13, 9, 7, 1]
排序
按照ASCII码
>>> mylist
[1, 7, 9, 23, 11, 13, 15, 17, 19]
>>> mylist.sort()
>>> mylist
[1, 7, 9, 11, 13, 15, 17, 19, 23]