Installation

pgmpy supports Python 3.10 through 3.14. For most users, the base PyPI install is enough:

pip install pgmpy

PyPI

Install the latest published release from PyPI:

pip install pgmpy

If you also want optional dependency groups, install pgmpy with extras. Quotes around the requirement are recommended and may be required in shells such as zsh.

Extra	Command	Includes
torch	pip install "pgmpy[torch]"	PyTorch and Pyro support for the torch backend and functional/hybrid workflows.
optional	pip install "pgmpy[optional]"	Everything in torch, plus optional packages such as daft-pgm, xgboost, litellm, and pygraphviz.
tests	pip install "pgmpy[tests]"	The test and development toolchain, including pytest, coverage, black, and pre-commit.
docs	pip install "pgmpy[docs]"	The documentation toolchain, including Sphinx, MyST, nbsphinx, sphinx-design, and the pydata-sphinx theme.
all	pip install "pgmpy[all]"	The combined optional, testing, and documentation dependencies.

Conda

Install the base package from conda-forge:

conda install -c conda-forge pgmpy

If you need the optional dependency groups listed above, install them with pip inside the same environment after creating it.

Development Version

To install the latest dev branch directly from GitHub:

pip install git+https://github.com/pgmpy/pgmpy.git@dev

Editable Install From Source

If you are contributing to pgmpy or working on the documentation locally, clone the repository and install it in editable mode:

git clone https://github.com/pgmpy/pgmpy.git
cd pgmpy

For a local development install with the test dependencies:

pip install -e .[tests]        # bash
pip install -e ".[tests]"      # zsh

The same pattern works for the other extras:

pip install -e ".[docs]"
pip install -e ".[torch]"
pip install -e ".[optional]"
pip install -e ".[all]"