save project

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:
+    name = input("请输入用户名:")#将输入的账号赋值给user变量
+    password = input("请输入密码:")#将输入的密码赋值给user变量
+    if name == username and password == userpassword:#对比账号密码
         print("登录成功!")
         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!")
+        break#跳出循环
+    else：
\ No newline at end of file
+    print("登录错误")
\ No newline at end of file