python实现四位随机验证码生成_制作随机验证码4位(验证码由0-9,大小写字母a-z,小写a-z构成),不区分大小写。用pyt

import random
import string
  
# s = string.ascii_lowercase #所有小写字母(a-z)
s=string.ascii_letters #所有大小写字母(a-z,A-Z)
#s=string.ascii_uppercase #所有大写字母(A-Z)
r = random.choice(s)
b=random.randint(0,9)
r1 = random.choice(s)
b1=random.randint(0,9)
r2 = random.choice(s)
b2=random.randint(0,9)
r3 = random.choice(s)
b3=random.randint(0,9)
a=[r,b]
a2=[r1,b1]
a3=[r2,b2]
a4=[r3,b3]
c1=random.choice(a)
# c2=random.sample(a2,1)
c2=random.choice(a2)
c3=random.choice(a3)
c4=random.choice(a4)
d=[c1,c2,c3,c4]  
print(d)