账号安全监测双11促销活动

import time

class AccountMonitor:
    def __init__(self, user_id):
        self.user_id = user_id
        self.login_history = []

    def log_login(self, ip_address, device_info):
        timestamp = time.time()
        self.login_history.append({
            'timestamp': timestamp,
            'ip_address': ip_address,
            'device_info': device_info
        })

    def check_anomaly(self):
        if len(self.login_history) < 2:
            return False
        
        last_login = self.login_history[-1]
        second_last_login = self.login_history[-2]
        
        time_diff = last_login['timestamp'] - second_last_login['timestamp']
        ip_diff = last_login['ip_address'] != second_last_login['ip_address']
        device_diff = last_login['device_info'] != second_last_login['device_info']
        
        if time_diff < 60 and ip_diff and device_diff:
            return True
        
        return False

# 示例使用
monitor = AccountMonitor(user_id=123)
monitor.log_login(ip_address='192.168.1.1', device_info='iPhone X')
monitor.log_login(ip_address='192.168.1.2', device_info='Samsung Galaxy')
print("Anomaly detected:", monitor.check_anomaly())