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user = 'hello world'paswd = 123456username = input("请输入用户名:")password = input("请输入密码:")for i in range(3): if username == user and int(password) == paswd: #判断用户名和密码是否都匹配 print("欢迎您的到来") break elif i < 2: username = input("请输入用户名:") password = input("请输入密码") elif i == 2: print("账户已锁定") break

