账号安全监测双十一活动

import time

# 模拟用户行为数据
user_activities = [
    {"user_id": 1, "action": "login", "timestamp": time.time()},
    {"user_id": 1, "action": "purchase", "timestamp": time.time() + 60},
    {"user_id": 1, "action": "login", "timestamp": time.time() + 120},
    {"user_id": 1, "action": "purchase", "timestamp": time.time() + 180},
]

# 规则：同一用户在1小时内多次登录视为可疑
def detect_suspicious_activity(activities):
    suspicious_users = []
    for i in range(len(activities) - 1):
        if activities[i]["user_id"] == activities[i + 1]["user_id"]:
            if activities[i + 1]["action"] == "login" and activities[i + 1]["timestamp"] - activities[i]["timestamp"] < 3600:
                suspicious_users.append(activities[i + 1]["user_id"])
    return suspicious_users

suspicious_users = detect_suspicious_activity(user_activities)
print("Suspicious users:", suspicious_users)