endf is a Python package for reading and interpreting ENDF-6 and ACE format nuclear data files. Compared to other packages that provide functionality for working with ENDF and ACE files, this package has numerous advantages:

• Easily installable through pip
• Thoughtful API design targeting Python first
• Offers both a low-level interface for working with the raw data in an ENDF file as well as a more intuitive high-level interface
• Fast file-loading performance thanks to optimized read routines
• Fully documented, tested, and type-hinted

The endf Python package can be installed from the Python Package Index using pip:

python -m pip install endf

For information on how to use the endf package and a full API reference, please see the online documentation.