python列表重復判斷

import random
import string
n = 0;
while n<10:
    str_source = string.ascii_letters + string.digits + string.punctuation
    str_list = random.sample(str_source,10)
    special=['/','\\','@','I','l','o','O']
    if len(set(str_list) & set(special))==0:
        str_final = ''.join(str_list)
        print(str_final)
        n+=1