随机生成验证码

# -*- coding: utf-8 -*-
"""
Created on Mon Sep 16 01:21:02 2019

@author: Administrator
"""
import random
from captcha.image  import ImageCaptcha
import numpy as np
from PIL  import Image
import matplotlib.pyplot as plt

num=['0','1','2','3','4','5','6','7','8','9']
alph=['a','b','c','d','e','f','g','h','i','j'  
    ,'l','m','n','o','p','q','r','s','t','u',
    'v','w','x','y','z']
ALPH=['A','B','C','D','E','F','G','H','I','J'  
    ,'L','M','N','O','P','Q','R','S','T','U',
    'V','W','X','Y','Z']

def random_captcha_text(size=4,charset=num+alph+ALPH):
    captcha_text=[]
    for i in range(size):
        c=random.choice(charset)
        captcha_text.append(c)
    return captcha_text
def gen_captcha_image():
    #生成验证码图片对象
    image=ImageCaptcha() 
    #生成验证码字母数字的组合的字符串
    captcha_text=random_captcha_text()
    captcha_text="".join(captcha_text)
    #传入字符串,生成一个png图片
    catpchaInfo=image.generate(captcha_text)
    #打开Image对象，生成验证码的信息和图片
    captcha_image=Image.open(catpchaInfo)
    captcha_image=np.array(captcha_image)
    return captcha_text,captcha_image

if __name__=="__main__":
    #生成验证码字符及图片
    text,image=gen_captcha_image()
    #显示出生成的验证码和图片
    f=plt.figure()
    ax=f.add_subplot(111)
    ax.text(1.1,1.9,text,ha='center',va='center')
    plt.imshow(image)
    plt.show()

运行效果图：