65~90 为对应的大写字母
import random
temp =‘‘
for i in range(6):
num = random.randrange(0,4)
if num==3 or num ==1:
rad2= random.randrange(0,10)
temp = temp + str(rad2)
else:
rad=random.randrange(65~90)
c = chr(rad)
temp =temp+c
peint(temp)
原文：https://www.cnblogs.com/huangguabushihaogua/p/9231647.html