source code:
# -*- 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 ...