Metadata-Version: 2.1
Name: pynetgen
Version: 0.2.0
Summary: A Python module for generating random network flows problem instances in DIMACS graph format.
Home-page: https://github.com/adam-rumpf/pynetgen
Author: Adam Rumpf
Author-email: arumpf@floridapoly.edu
License: MIT
Project-URL: Source, https://github.com/adam-rumpf/pynetgen
Project-URL: Bug Tracker, https://github.com/adam-rumpf/pynetgen/issues
Keywords: netgen,network flows,operations research,problem instances,math,graph theory
Platform: any
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Development Status :: 3 - Alpha
Classifier: Intended Audience :: Science/Research
Classifier: Topic :: Scientific/Engineering :: Mathematics
Classifier: Natural Language :: English
Requires-Python: >=3.7
Description-Content-Type: text/markdown
License-File: LICENSE

# PyNETGEN

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A Python module for generating random network flows problem instances in [DIMACS graph format](http://dimacs.rutgers.edu/archive/Challenges/), including an implementation of the NETGEN algorithm ([Klingman et al. 1974](https://doi.org/10.1287/mnsc.20.5.814)).

## Introduction

This package defines a variety of scripts for generating random instances of network flows problems subject to tuneable parameters. This can be accomplished within Python by importing `pynetgen` as a module, or from the command line by calling `pynetgen` as a shell script.

PyNETGEN began as a Python implementation of NETGEN, a random network flows problem instance generator defined in:

> D. Klingman, A. Napier, and J. Stutz. NETGEN: A Program for generating large scale capacitated assignment, transportation, and minimum cost flow network problems. _Management Science_, 20(5):814-821, 1974. [doi:10.1287/mnsc.20.5.814](https://doi.org/10.1287/mnsc.20.5.814).

This package's implementation of NETGEN is based on a [C implementation](https://lemon.cs.elte.hu/trac/lemon/browser/lemon-benchmark/generators/netgen) of NETGEN by Norbert Schlenker (1989). The original implementation was used to generate random minimum-cost flow, maximum flow, and assignment problems, exported in DIMACS graph format.

An alternate network generation algorithm is also included for generating grid-based graphs similar to those described for the test problems of:

> S. Sadeghi, A. Seifi, and E. Azizi. Trilevel shortest path network interdiction with partial fortification. _Computers & Industrial Engineering_, 106:400-411, 2017. [doi:10.1016/j.cie.2017.02.006](https://doi.org/10.1016/j.cie.2017.02.006).

## Project Status

This is a work in progress. It currently includes only a few necessary submodules and some of the overall framework, and it is not yet release-ready.
