1、纯数字验证码

使用random.randint函数生成6位纯数字验证码。

import random

# 生成6位数字验证码
verification_code = ''.join([str(random.randint(0, 9)) for _ in range(6)])
print(verification_code)

2、字母数字混合验证码

使用random.choice函数和string.ascii_letters和string.digits来生成一个包含字母和数字的混合验证码。

import random
import string

# 生成6位字母数字混合验证码
characters = string.ascii_letters + string.digits
verification_code = ''.join(random.choice(characters) for _ in range(6))
print(verification_code)

3、纯字母验证码

使用random.choice函数和string.ascii_letters生成一个包含只有字母的验证码。

import random
import string

# 生成6位字母验证码
verification_code = ''.join(random.choice(string.ascii_letters) for _ in range(6))
print(verification_code)

4、随机生成6位验证码

用比较原始的方法随机生成6位验证码，包括大小写字母和数字。

# -*- coding: utf-8 -*-
import random
def generate_verification_code():
    ''' randomly generated a 6 bit verification code '''
    code_list = []
    for i in range(10): # 0-9 number
        code_list.append(str(i))
    for i in range(65, 91): # A-Z
        code_list.append(chr(i))
    for i in range(97, 123): # a-z
        code_list.append(chr(i))
    myslice = random.sample(code_list, 6)  
    verification_code = ''.join(myslice) # list to string
    # print code_list
    # print type(myslice)
    return verification_code
def generate_verification_code2():
    ''' randomly generated a 6 bit verification code '''
    code_list = []
    for i in range(2):
        random_num = random.randint(0, 9) # The number of randomly generated 0-9
       # using random.randint () function to generate a random integer a, such that 65<=a<=90
       # corresponding from "A" to "Z" of the ASCII code
        a = random.randint(65, 90)
        b = random.randint(97, 122)
        random_uppercase_letter = chr(a)
        random_lowercase_letter = chr(b)
        code_list.append(str(random_num))
        code_list.append(random_uppercase_letter)
        code_list.append(random_lowercase_letter)
    verification_code = ''.join(code_list)
    return verification_code
if __name__ == '__main__':
    code = generate_verification_code()
    code2 = generate_verification_code2()
    print code
    print code2

执行结果

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