账号异常告警首购活动

import datetime

class UserAccount:
    def __init__(self, username):
        self.username = username
        self.login_history = []

    def login(self, location):
        now = datetime.datetime.now()
        self.login_history.append((now, location))
        self.check_for_anomalies()

    def check_for_anomalies(self):
        if len(self.login_history) > 1:
            last_login = self.login_history[-2][0]
            current_login = self.login_history[-1][0]
            time_diff = current_login - last_login
            if time_diff < datetime.timedelta(minutes=5) and self.login_history[-2][1] != self.login_history[-1][1]:
                print(f"ALERT: {self.username} has logged in from a different location within 5 minutes!")

# 使用示例
user = UserAccount("john_doe")
user.login("New York")
user.login("Los Angeles")  # 这将触发告警