passagemath: Find automorphism groups of graphs, generate non-isomorphic graphs with nauty
passagemath is open source mathematical software in Python, released under the GNU General Public Licence GPLv2+.
It is a fork of SageMath, which has been developed 2005-2026 under the motto “Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, and MATLAB”.
The passagemath fork uses the motto “Creating a Free Passage Between the Scientific Python Ecosystem and Mathematical Software Communities.” It was created in October 2024 with the following goals:
providing modularized installation with pip from binary wheels, - this major project was started in May 2020 in the Sage codebase and completed in passagemath 10.5.29 (May 2025),
establishing first-class membership in the scientific Python ecosystem,
providing independently usable Python interfaces to upstream libraries,
offering platform portability and integration testing services to upstream projects,
inviting collaborations with upstream projects,
empowering Sage users to participate in the scientific Python ecosystem by publishing packages,
developing a port to WebAssembly (Pyodide, emscripten-forge) for serverless deployment with Javascript,
developing a native Windows port - passagemath 10.6.1 (July 2025) published the first pip-installable wheel packages for native Windows on x86_64, - passagemath packages became available in the [MSYS2 software distribution](https://packages.msys2.org/search?t=pkg&q=passagemath) in November 2025.
Moreover, the passagemath project:
provides a stable, frequently updated version of the Sage distribution,
integrates additional mathematical software, notably Macaulay2, a full set of GAP packages, and the Combinatorial Matrix Recognition library,
curates a library of Sage user packages.
Full documentation is available online.
passagemath attempts to support and provides binary wheels suitable for all major Linux distributions and recent versions of macOS.
Binary wheels for native Windows (x86_64, ARM) are are available for a subset of the passagemath distributions. Use of the full functionality of passagemath on Windows currently requires the use of Windows Subsystem for Linux (WSL) or virtualization.
The supported Python versions in the passagemath-10.8.x series are 3.11.x-3.14.x; the passagemath-10.6.x series (EOL 2026-10) still supports Python 3.10.x.
About this pip-installable distribution package
This pip-installable distribution passagemath-nauty provides an interface to nauty and traces, the programs for computing automorphism groups of graphs and digraphs by Brendan McKay and Adolfo Piperno.
What is included
Graph generators graphs.nauty_genbg, graphs.nauty_geng, graphs.nauty_genktreeg
Hypergraph generator hypergraphs.nauty
Raw access to all gtools from Python
The binary wheels published on PyPI include a prebuilt copy of nauty and traces.
Examples
Using the gtools on the command line:
$ pipx run --spec "passagemath-nauty" sage -sh -c 'geng 4' >A geng -d0D3 n=4 e=0-6 C? CC CE CF CQ CU CT CV C] C^ C~ >Z 11 graphs generated in 0.00 sec
Finding the installation location of a gtools program:
$ pipx run --spec "passagemath-nauty[test]" ipython
In [1]: from sage.features.nauty import NautyExecutable
In [2]: NautyExecutable('geng').absolute_filename()
Out[2]: '/Users/mkoeppe/.local/pipx/.cache/535c90a22321f64/lib/python3.11/site-packages/sage_wheels/bin/geng'
Use with sage.graphs:
$ pipx run --spec "passagemath-nauty[test]" ipython
In [1]: from passagemath_graphs import *
In [2]: gen = graphs.nauty_geng("7 -c") # connected graphs on 7 vertices
In [3]: len(list(gen))
Out[3]: 853
Metadata
Release files for passagemath-nauty 10.8.13
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Source distribution (sdist)
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Built distributions (wheels)
Total release size: 192.7 MB
Release files / passagemath_nauty-10.8.13.tar.gz
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