MontePy is the most user friendly Python library (API) to read, edit, and write MCNP input files.
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Updated
Dec 18, 2025 - Python
The Monte Carlo N-Particle (MCNP) radiation transport code is a Monte Carlo transport code developed by Las Alamos National Laboratory (LANL).
It supports over 37 different types of particles, and is widely used by nuclear engineers,
and nuclear physicists.
MontePy is the most user friendly Python library (API) to read, edit, and write MCNP input files.
Tools used for MCNP input deck syntax highlighting
Monte Carlo tools for use with MCNP input or output for data processing.
Created by Los Alamos National Laboratory