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| """ | |
| Time-based pattern anomaly detector | |
| """ | |
| from typing import List, Dict, Any | |
| from telecom_anomaly.detection.base import BaseDetector | |
| from telecom_anomaly.core.models import AnomalyResult, TelecomConfig | |
| class TimePatternDetector(BaseDetector): | |
| """Detect unusual time patterns""" | |
| def __init__(self, config: TelecomConfig): | |
| super().__init__(config) | |
| def detect(self, data: List[Dict], **kwargs) -> List[AnomalyResult]: | |
| """Detect time-based anomalies""" | |
| anomalies = [] | |
| for idx, row in enumerate(data): | |
| # Check for night calls (excluding service) | |
| if row.get('is_night') and not row.get('is_service'): | |
| # Simple heuristic: flag all night calls | |
| # This can be enhanced with statistical models | |
| anomalies.append(self._create_anomaly( | |
| row_index=idx, | |
| column_name='time', | |
| value=row.get('event_time', ''), | |
| method='night_call', | |
| score=1.0, | |
| threshold=0.5, | |
| confidence=0.60, | |
| msisdn=row.get('msisdn', '') | |
| )) | |
| return anomalies |