save project

diy1.py

 username = "python"
 userpassword = "123456"
+i=3
 while True:
+    if i>0:
         yourname=input("输入")
         yourpassword=input("输入密码")
+        i-=1
         if username==yourname and userpassword==yourpassword:
             print("登录成功") 
             break
         if username!=yourname:
             print("用户名错误！！！！！")
+            print("您还有"+str(i)+"次机会")
             continue
         if userpassword!=yourpassword:
             print("密码！！！！！")
+            print("您还有"+str(i)+"次机会")
+    else:
+        print("封号！！！！！！！！！！")
+        exit()
 print("欢迎")
 
 
+