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arXiv · 2009.02572

PySAD: A Streaming Anomaly Detection Framework in Python

Selim F. Yilmaz·Suleyman S. Kozat
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Abstract

Streaming anomaly detection requires algorithms that operate under strict constraints: bounded memory, single-pass processing, and constant-time complexity. We present PySAD, a comprehensive Python framework addressing these challenges through a unified architecture. The framework implements 17+ streaming algorithms (LODA, Half-Space Trees, xStream) with specialized components including projectors, probability calibrators, and postprocessors. Unlike existing batch-focused frameworks, PySAD enables efficient real-time processing with bounded memory while maintaining compatibility with PyOD and scikit-learn. Supporting all learning paradigms for univariate and multivariate streams, PySAD provides the most comprehensive streaming anomaly detection toolkit in Python. The source code is publicly available at github.com/selimfirat/pysad.

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Selim F. Yilmaz, Suleyman S. Kozat. 2020-09-05. PySAD: A Streaming Anomaly Detection Framework in Python. https://arxiv.org/abs/2009.02572

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