save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=0
 while True:
 while True:
+    if i!=3:
         name = input("请输入用户名:")
         name = input("请输入用户名:")
         password = input("请输入密码:")
         password = input("请输入密码:")
+        i+=1
         if name == username and password == userpassword :
         if name == username and password == userpassword :
             print("登录成功!")
             print("登录成功!")
             break
             break
@@ -11,4 +14,7 @@ while True:
             continue
             continue
         if password != userpassword:
         if password != userpassword:
             print("用户密码错误，请重新输入")
             print("用户密码错误，请重新输入")
+    else:
+        print("您的机会已用完")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file