trueskill 0.1.3

A Bayesian Skill Rating System

An implementation of the TrueSkill algorithm for Python. TrueSkill is a rating system among game players and it is used on Xbox Live to rank and match players.

>>> from trueskill import Rating, transform_ratings, match_quality
>>> p1, p2, p3, p4 = Rating(), Rating(), Rating(), Rating()
>>> team1, team2, team3 = (p1,), (p2, p3), (p4,)
>>> transform_ratings([team1, team2, team3]) #doctest: +NORMALIZE_WHITESPACE
[(Rating(mu=35.877, sigma=6.791),),
 (Rating(mu=17.867, sigma=7.059), Rating(mu=17.867, sigma=7.059)),
 (Rating(mu=21.255, sigma=7.155),)]
>>> print '%.1f%%' % (match_quality([team1, team2, team3]) * 100)
4.7%

Links

• GitHub repository

• development version

See Also

• TrueSkill(TM) Ranking System by Microsoft

• “Computing Your Skill” by Jeff Moser

• “The Math Behind TrueSkill” by Jeff Moser

• TrueSkill Calcurator by Microsoft