save project

diy1.py

 
 import turtle
+i=3
 username="python"
 userpassward="123456"
 while True:
-   name=input("请输入用户名：")
-   password=input("请输入密码：")
-   if name==userpassward and password==userpassward:
-      print("登录成功")
-      break
-   if name !=username:
-      print("用户名不存在，请重新输入")
-    if password !=userpassward:
-      print("密码输入用误，请重新输入")
+    if i>0：
+       name=input("请输入用户名：")
+       passward=input("请输入密码：")
+       i-=1
+       if name== username and passward==userpassward:
+           print("登录成功")
+           break
+       if name !=userpassward:
+           print()
 turtle.done()