save project

diy2.py

+2 = 3
 username = "python"
 userpassword = "123456"
 while True:
+    if 1>0:
         name = input("请输入用户名:")
         password = input("请输入密码:")
+        i -= 1
         if name == username and password == userpassword:
             print("登录成功!")
             break
-    elif name != username:
+        if name != username:
             print("username don't exsist")
+            continue 
+        if password != userpassword:
+            print(password wrong please try again)       
     else: 
         print("password wrong")
+        exit()
 print("welcome ")    
\ No newline at end of file