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Python interface to CmdStan

Project description

pycmdstan

pipeline status coverage report PyPI package version Documentation Status

Python interface to CmdStan.

Usage

After installing, pip install -U pycmdstan, a contrived example would be

from pycmdstan import Model, Run

model = Model('''
data { vector[20] x; real mu; }
parameters { real sig; }
model { x ~ normal(mu, sig); }
''')

assert model.sample(data={'mu': 5.0, x: randn(20)}, chains=4).R_hat.max() < 1.2

See the docs for more.

Contributing

Contributions are welcome, please start in the issue tracker. Use YAPF to format the code. The Dockerfile can ease local development,

docker build -t pycmdstan .
docker run --rm -it pycmdstan pytest -n4 pycmdstan/tests.py

Acknowledgements

  • PSIS code is by Aki Vehtari & Tuomas Sivula (BSD licensed, repo here)

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