abacusutils contains a Python namespace package called abacusnbody. This is the name to import (not abacusutils, which is just the name of the PyPI package). For example, to import the compaso_halo_catalog module, use


The Python: compaso_halo_catalog page has the documentation and API for this module.

The API for the other, less commonly used modules in the abacusnbody namespace is located here: abacusnbody API.

Specific examples of how to use abacusutils to work with AbacusSummit data will soon be given at the AbacusSummit website:


Coming soon! For simple data access patterns, the Unix Pipes approach may suffice.

Unix Pipes

The pipe_asdf Python script reads columns from ASDF files and pipes them to stdout. Programs can then read the raw binary from stdin without having to worry about the details of file formats or compression. For example, to pipe two columns from halo_info_000.asdf to the client analysis program, use:

$ pipe_asdf halo_info_000.asdf -f N -f x_com | ./client

The pipe_asdf script is installed when installing abacusutils via pip. Alternatively, it is available directly in the abacusutils/pipe_asdf/ directory. An example client program is available in the same directory.

See the documentation here: Unix Pipes: pipe_asdf.