# 数字/数字+字母 # def rand_code(n=6 , alph_flag = True): # code = '' # for i in range(n): # rand_num = str(random.randint(0,9)) # if alph_flag: # rand_alph = chr(random.randint(97,122)) # rand_alph_upper = chr(random.randint(65,90)) # rand_num = random.choice([rand_num,rand_alph,rand_alph_upper]) # code += rand_num # return code # # ret = rand_code(n = 4) # print(ret)