Installation

PyMC can be installed with pip.

We also recommend installing nutpie, a fast NUTS sampler written in Rust. When nutpie is installed, PyMC selects it as the default NUTS sampler automatically.

pip install "pymc[nutpie]"

To install PyMC on its own:

pip install pymc

Installing with conda

As an alternative, PyMC can be installed with conda using Anaconda or Miniforge. This is recommended if you want to use the legacy C backend or need control over the BLAS library.

We recommend a fresh conda environment:

conda create -c conda-forge -n pymc_env "pymc>=6"
conda activate pymc_env

If you like, replace the name pymc_env with whatever environment name you prefer.

To enable nutpie when using conda:

conda install -c conda-forge nutpie

See also

The conda-forge tips & tricks page to avoid installation issues when using multiple conda channels (e.g. defaults and conda-forge).

JAX sampling

If you wish to enable sampling using the JAX backend via NumPyro, you need to install it manually as it is an optional dependency:

pip install numpyro

Similarly, to use the BlackJAX sampler instead:

pip install blackjax