auto save

diy2.py

+username = "python"
+userpassword = "123456"
+while True:
+    n = input()
+    p = input()
+    if n != username or p != userpassword:
+        print("用户名和密码错误!请重新输入")
+    if n == username and p == userpassword:
+        print("Hi")
+        break
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