Extractors

Extractors are stateful objects that attach to a ReplayParser, accumulate data during parsing, and expose structured output when parsing is complete.

Each extractor subscribes to one or more events (entity events, combat log entries, or user messages) via the parser's callback system. After parser.parse() completes, the extractor's output properties are ready to read.

Extractor	Module	What it collects
PlayerExtractor	gem.extractors.players	Hero/player state snapshots, time series, rune pickups
ObjectivesExtractor	gem.extractors.objectives	Tower kills, barracks, Roshan kills, Tormentor kills
WardsExtractor	gem.extractors.wards	Ward placements with coordinates
CourierExtractor	gem.extractors.courier	Courier state per tick
DraftExtractor	gem.extractors.draft	Pick and ban events
TeamfightsExtractor	gem.extractors.teamfights	Teamfight window detection
classify_lane()	gem.extractors.lane	Lane role from 10-min position heatmap

When using gem.parse(), all extractors are attached and run automatically. classify_lane() is a pure function called internally by match_builder — it can also be called directly on any lane_pos dict.