账号威胁发现双十二优惠活动

def check_account_activity(user_id, activity_type, location):
    # 假设我们有一个用户行为数据库
    user_activity_db = get_user_activity_db()
    
    # 获取用户最近的活动记录
    recent_activities = user_activity_db.get(user_id, [])
    
    # 检查活动是否异常
    if is_suspicious(activity_type, location, recent_activities):
        send_alert(user_id, activity_type, location)
        return False  # 活动被标记为可疑
    
    return True  # 活动正常

def is_suspicious(activity_type, location, recent_activities):
    # 简单的规则检查，例如同一地点短时间内多次登录
    if activity_type == 'login':
        same_location_count = sum(1 for act in recent_activities if act['location'] == location)
        if same_location_count > 5:  # 假设超过5次为可疑
            return True
    return False

def send_alert(user_id, activity_type, location):
    # 发送警报通知用户或管理员
    print(f"Alert: Suspicious {activity_type} detected for user {user_id} from {location}")

# 示例调用
check_account_activity('user123', 'login', 'New York')