save project

diy2.py

+i=3
 username = "python"
 userpassword = "123456"
 while True:
+    if i>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("用户不存在,请重新输入")
-    else:
+            continue
+        if password != username:
             print("用户名和密码错误!请重新输入")
+    else:
+        
 print("欢迎来到贝尔编程!")
\ No newline at end of file