save project

diy2.py

 username = "python"
 userpassword = "123456"
-i=0
+i=3
 while True:
-    if i!=3:
+    if i>0:
         name = input("请输入用户名:")
         password = input("请输入密码:")
-        i+=1
+        i-=1
         if name == username and password == userpassword :
             print("登录成功!")
             break
         if name != username:
             print("用户名错误，请重新输入")
+            print("温馨提示：您还剩"+str(i)+"次机会")
             continue
         if password != userpassword:
             print("用户密码错误，请重新输入")
+            print("温馨提示：您还剩"+str(i)+"次机会")
     else:
         print("您的机会已用完")
         exit()