save project

diy2.py

- i=3
+i=3
 username = "python"
-
 userpassword = "123456"
 while True:  
-    i>0
+    if  i>0:
         name = input("请输入用户名:")
         password = input("请输入密码:")
         i-=1
@@ -11,12 +10,13 @@ while True:
     
             print("登录成功!")
             break
-    print("用户名和密码错误!请重新输入")
-    if  name != username :
+        if  name != username:
             print("用户名错误!请重新输入")
-    elif :
+        
+            print("密码错误!请重新输入")
+        else:
             print("密码错误!请重新输入")
-    elif :
+    else:
         print("错误")
-exit()        
+        exit()        
 print("欢迎来到贝尔编程!")
\ No newline at end of file