生成随机验证码

1   ramdom.sample 实现

from random import sample

str_u = [chr(i) for i in range(97,123)]   # 大写字母
str_l = [chr(i) for i in range(65,91)]    # 小写字母
str_n = [chr(i) for i in range(48,58)]    # 数字

str_a = str_u + str_l + str_n

num = int(input('输入验证码长度：'))

check_code = ''.join(sample(str_a, num))
print(check_code)

系统库string

import string   # 导入string这个模块
from random import sample,choice
print(string.digits)  # 输出包含数字0~9的字符串
print(string.ascii_letters)  # 包含所有字母(大写或小写)的字符串
print(string.ascii_lowercase)  # 包含所有小写字母的字符串
print(string.ascii_uppercase)  # 包含所有大写字母的字符串

# sample
str = string.digits + string.ascii_letters
check_code = ''.join(sample(str, 8))
print(check_code)

# choice
ch = ''
for i in range(8):
    ch += choice(str)
print(ch)

最终代码如下

from string import ascii_letters, ascii_lowercase, ascii_uppercase, digits
from random import sample, choice

UPPER = ascii_uppercase
LOWER = ascii_lowercase
LETTER = ascii_letters
DIGIT = digits
ALL_STR = DIGIT + LETTER

def check_code1(num):
    ch = ''
    for i in range(num):
        ch += choice(ALL_STR)
    return ch


def check_code2(num):
    ch = ''.join(sample(ALL_STR,num))
    return ch

num = int(input('验证码长度：'))
print(check_code1(num))
print(check_code2(num))