auto save

diy2.py

+username = "123""
+userpassword = "123456"
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if name == username and password == userpassword :
+        print("登录成功!")
+        break
+    if name!= username:
+      input("用户名错误")
+    if name!=  userpassword:
+       input("密码错误")
+print("欢迎来到贝尔编程!")
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