用来创建list的方式。

a = [i for i in rang(1,11)]

返回[1,2,3,4,5,6,78,9,10]

b = [i*i for i in rang(1,3)]

返回[1,4]

[i+j for i in ‘a,b,c‘ j for j in ‘x,y,z‘]

返回[‘ax‘,‘by‘,‘cz‘]

python 列表生成器