python中的苦-----列表(list)操作

列表元素的修改

x = [1,2,3]
x[1] = 4
x = [1, 4, 3]

删除列表元素

del x[2]

分片赋值

name = list('perl')
['p', 'e', 'r', 'l']

name[2:] = list('ar')
['p','e','a','r']

append用法

x = [1,2,3]
x.append(4)
[1, 2, 3, 4]

count用法

x = [1,2,3]
y = x.count(1)
y = 1

extend用法

x = [1,2,3]
y = [4,5,6]
x.extend(y)
print (x)
[1, 2, 3, 4, 5, 6]

index方法

x = [1, 2, 3, 4, 5, 6]

y = x.index(3)

y = 2

pop方法

x = [1, 2, 3, 4, 5, 6]

x.pop(1)

[1, 3, 4, 5, 6]