实验6
摘要:
def is_valid(n): n=str(n) while len(n)==18: for i in n: if i.isdigit()==False and i!='X': return False return True break else: return False with open( 阅读全文
posted @ 2022-05-19 10:37 zlmk 阅读(18) 评论(1) 推荐(0) 编辑