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pydfs-lineup-optimizer

Open-source Python library for building optimal DFS lineups across major sites

Lineup optimizer
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About pydfs-lineup-optimizer

pydfs-lineup-optimizer is an MIT-licensed Python package that generates optimal DFS lineups from site salary files and your own projections. It supports DraftKings, FanDuel, Yahoo and several smaller sites across many sports, including captain/showdown, single-game and tiers formats. It is one of the more widely used open-source DFS optimizers, though its latest PyPI release (3.6.1) and last code commit are both from September 2021.

Features

  • pip-installable Python package
  • Loads DK, FD and Yahoo salary CSVs
  • Stacking, exposure and lock/exclude rules
  • Showdown/captain and single-game formats
  • Generates many unique lineups per run
  • Documentation on Read the Docs

Sports and sites covered

Works with

  • DraftKings
  • FanDuel
  • Yahoo

Pricing

Free

MIT license; install via pip

Prices as listed on github.com when we checked. Confirm current pricing on their site.

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Sources and corrections

Last checked Oct 3, 2026. We build every listing from the sources below and recheck them regularly. If something about pydfs-lineup-optimizer has changed, let us know.