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cupbearer 🍷

cupbearer is a Python library for mechanistic anomaly detection. Its main purpose is to make it easy to implement either a new mechanistic anomaly detection task, or a new detection method, and evaluate it against a suite of existing tasks or methods. To that end, the library provides:

  • A clearly defined interface for tasks and detectors to ensure compatibility
  • Scripts and other helpers for training and evaluating detectors that satisfy this interface (to reduce the amount of boilerplate code you need to write)
  • Implementations of several tasks and detectors as baselines (currently not that many)

Contributions of new tasks or detectors are very welcome! See the developer guide to get started.

Installation

The easy way: inside a virtual environment with Python >= 3.10, run

pip install git+https://github.com/ejnnr/cupbearer.git

(You could also pip install cupbearer, but note that the library is under heavy development and the PyPi version will often be outdated.)

Alternatively, if you're going to do development work on the library itself:

  1. Clone this git repository
  2. Create a virtual environment with Python 3.10 and activate it
  3. Run pip install -e . inside the git repo to install the package in editable mode

Notes on Pytorch

Depending on what platform you're on, you may need to install Pytorch separately before installing cupbearer, in particular if you want to control CUDA version etc.

Running experiments

We provide scripts in cupbearer.scripts for more easily running experiments. See the demo notebook for a quick example of how to use them---this is likely also the best way to get an overview of how the components of cupbearer fit together.

These "scripts" are Python functions and designed to be used from within Python, e.g. in a Jupyter notebook or via submitit if on Slurm. But of course you could also write a simple Python wrapper and then use them from the CLI. The scripts are designed to be pretty general, which sometimes comes at the cost of being a bit verbose---we recommend writing helper functions for your specific use case on top of the general script interface. Of course you can also use the components of cupbearer directly without going through any of the scripts.

Whence the name?

Just like a cupbearer tastes wine to avoid poisoning the king, mechanistic anomaly detection methods taste new inputs to check whether they're poisoned. (Or more generally, anomalous in terms of how they affect the king ... I mean, model. I admit the analogy is becoming a bit strained here.)