Skip to main content
Join the official 2019 Python Developers SurveyStart the survey!

A package for stable matching problems with couples

Project description


Scarf is a python library for solving stable matching problems with couples, where one application is the National Resident Matching Program. The package is named after Hebert Scarf, the inventor of Scarf's lemma and algorithm.


  • Written in python3.
  • Solve for a near feasible stable matching given the preference of doctors and hospitals, and hospital capacities.
  • Generate random doctor hospital instances.
  • Accelerated with Numba. It is fast!

Accepted input format:

  • Python Lists
  • JSON



pip install scarfmatch


  import scarf
  single_pref = [[0, 1, 2], 
                 [1, 0]]
  couple_pref = [[(0, 0), (1, 1), (1, 0), (0, 1), (2, 2)],
                 [(1, 1), (2, 2), (1, -1)]]
  hospital_pref = [0, (0, 1), 1, (1, 0), (0, 0), (1, 1)]
  hospital_cap = [2, 3, 1]

  S = scarf.create_instance(single_pref, couple_pref, hospital_pref, hospital_cap)
  sol = scarf.solve(S)



Released under MIT license

Copyright (c) 2019 Dengwang Tang <>

Project details

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Files for scarfmatch, version 0.0.2
Filename, size File type Python version Upload date Hashes
Filename, size scarfmatch-0.0.2-py3-none-any.whl (18.7 kB) File type Wheel Python version py3 Upload date Hashes View hashes
Filename, size scarfmatch-0.0.2.tar.gz (16.3 kB) File type Source Python version None Upload date Hashes View hashes

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page