Python3的列表推导式
# -*- coding: utf-8 -*-
li = [1,2,3,4,5,6,7,8,9]
print ([x**2 for x in li])
print ([x**2 for x in li if x>5])
print (dict([(x,x*10) for x in li]))
print ([ (x, y) for x in range(10) if x % 2 if x > 3 for y in range(10) if y > 7 if y != 8 ])
vec=[2,4,6]
vec2=[4,3,-9]
sq = [vec[i]+vec2[i] for i in range(len(vec))]
print (sq)
print ([x*y for x in [1,2,3] for y in [1,2,3]])
testList = [1,2,3,4]
def mul2(x):
return x*2
print ([mul2(i) for i in testList])