auto save

diy2.py

+username ="python"
+userpassword ="123456"
+name = input("请输入用户名")
+
+while ture:
+    while name!=username
+        print("用户名错误，请重新输入！")
+        name=input("请输入用户名：")
+    while password!=userpassword:
+        print("密码错误，请重新输入！")
+        name=input("请输入密码：")
+    if name == username
+
+
+
+
+