This is a Rust port of the marshalparser project, which is written in Python.

It provides both a command-line interface and a library interface for parsing data in Python's internal "marshal" serialization format, functionality for pretty-printing the resulting data structures, and some basic data manipulation, for example, removing unused reference flags in order to make pyc files more reproducible.

The default feature set is intentionally minimal. Dependencies that are only required for building the command-line interface can be enabled with the cli flag. Pretty-printing of byte strings can be enabled with the fancy feature.

This project supports parsing "marshal" data produced by CPython versions between 3.8 and 3.13.