save project

3.py

+i=3
 username = 'python'
 userpassword = '123456'
 while True:
+    if i>0 :
         name=input('请输入用户名：')
         password=input('请输入账号密码：')
+        i-=1
         if name == username and userpassword == password:
             print('登录成功')
             break
@@ -11,4 +14,8 @@ while True:
             continue
         if userpassword != password:
             print('密码错误，请重新输入')
+    else:
+        print('账号已锁定')
+        exit()
 print('欢迎来到贝尔编程')
+