random random block codes

 1 def v_code():
 2     code_str = ''
 3     for i in range(5):
 4         import random
 5         num = random.randint(0,9)
 6         str1 = chr(random.randint(65,90))
 7         str2 = chr(random.randint(97,122))
 8         code_str +=str(random.choice([num,str1,str2]))
 9     return code_str
10 print(v_code())
11 输出：
12 0WT2Y