sweetpea 0.1.1

A language for synthesizing randomized experimental designs

SweetPea

Build Status

SweetPea is a domain-specific language for specifying factorial experimental designs and synthesizing trial sequences from those design specifications. An explanation of factorial experimental designs and how to build and manipulate them in SweetPea can be found in the SweetPea Guide.

SweetPea includes a synthesizer to generate unbiased sequences of trials that satisfy the design's constraints. In the most general case, SweetPea compiles an experimental design into a boolean satisfiability formula that is passed to a SAT sampler.

Currently, SweetPea uses the Unigen SAT sampler. Unigen provides statistical guarantees that the solutions it finds are approximately uniformly probable in the space of all valid solutions. Unfortunately, sampling this way is not tractable for all designs that can be expressed with SweetPea, and improving sampling strategies is a primary direction for ongoing work.

Disclaimer

SweetPea is still under active development, and therefore the interface and API may change. Please use with caution!

Dependencies

SweetPea requires Python 3.7.9 or later.

Installation

There are two ways to install SweetPea: from the Python Package Index (PyPI), or from source.

Installing from PyPI

SweetPea can be installed from PyPI via pip:

$ pip install sweetpea

This version may lag behind the current development version.

Installing from Source

To get the most up-to-date version of SweetPea, clone this repository, install SweetPea's dependencies, and install SweetPea itself:

$ git clone https://github.com/sweetpea-org/sweetpea-py.git
$ cd sweetpea-py
$ pip install -r requirements.txt
$ pip install .

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:exclamation: Important!

The pip install . command installs SweetPea locally, but it will not automatically check for updates. If you intend to manually update your local copy of SweetPea, you should instead do pip install -e . to tell pip to use the source dynamically.

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Examples

There are example programs in the example_programs directory, and there is a detailed explanation of how to use SweetPea in the SweetPea Guide.

API Documentation

The SweetPea API is documented in the API section of the SweetPea Guide.

Contributing

Information on how to contribute to SweetPea's development can be found in the Contributing section of the SweetPea Guide.