python生成一个4位随机验证码

python生成一个4位随机验证码

import random
checkcode = ''
for i in range(4):
    current = random.randrange(0,4)
    if current == i:
        tep = chr(random.randint(65,97))
    else:
        tep = random.randint(0,9)
    checkcode+=str(tep)
print(checkcode)

M = random.randrange(a,b),M的取值范围是 a <= M < b
N = random.randint(a, b)，N在此处的选择范围是a <= N <= b，是包含b的
所以，理论上可以理解为：randint(a,b) == randrange(a,b+1)