Installation

Note

It is recommended to install PyTorch before installing nessai. See the PyTorch documentation for how to install the correct version.

condapip

conda install -c conda-forge -c pytorch nessai

This will install the dependencies needed but the version of PyTorch will not necessarily be the correct version for your system.

Using nessai with bilby

As of bilby version 2.3.0, the recommended way to use nessai is via the nessai-bilby sampler plugin. This can be installed via either conda or pip and provides the most up-to-date interface for nessai. This includes support for the importance nested sampler (inessai).

condapip

conda install -c conda-forge nessai-bilby

For more details about the plugin, see the nessai-bilby documentation

For older versions of bilby (<2.3.0 and >1.1.0), no additional packages are required to use nessai but some versions may be incompatible.

For examples of how to run nessai via bilby see the examples directory.

Developing for nessai

To install nessai for development purposes see the contribution guidelines.