python 继承父类（上一篇） 字母数字验证码

from random import randint
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
import string,random
#
from verifycode import VerifyCode

# str1 = (''.join(random.sample(string.ascii_letters + string.digits, 10)))  # 随机字符
class VerifyCode1(VerifyCode):
    def rand_string(self):
        super().rand_string()
        # string = ''               # 方法一
        # for i in range(4):
        #     a = randint(0, 1)
        #     if a == 0:
        #         b = randint(65, 122)
        #         while 90 < b < 97:
        #             b = randint(65, 122)
        #         string += chr(b)
        #     else:
        #         string += str(randint(0, 9))
        str1 = (random.sample(string.ascii_letters + string.digits, 4)) # 方法二
        return str1


vc = VerifyCode1()
vc.generate_code()