1 import random
 2 a=['0','1','2','3','4','5','6','7','8','9',\
 3 'A','B','C','D','E','F','G','H','I','J','K','L',\
 4 'M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'\
 5 'a','b','c','d','e','f','g','h','i','j','k','l',\
 6 'm','n','o','p','q','r','s','t','u','v','w','x','y','z']
 7 list1=[]
 8 for i in range(6):
 9     ran_list=random.sample(a,1)#生成一个随机码，输出为列表格式    
10     ran_str=''.join(ran_list)#转化为字符串格式 
11     list1.append(ran_str)#循环追加成为6位，输出为列表格式
12 random1=''.join(list1)#转化为字符串格式
13 print(random1)#打印

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