auto save

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 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!")
-    print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        if name == username:
+            if password == userpassword:
+                print("登录成功!")
+                break
\ No newline at end of file
+        else:
+            print("用户名或密码错误!请重新输入")
+print("欢迎来到贝尔编程!") 
+print("欢迎"+pname+"登录")
\ No newline at end of file