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[python] Simplify merged LeRobot source metadata - #11074
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XiaoHongbo-Hope merged 3 commits intoNov 10, 2026
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Purpose
Merged LeRobot imports currently archive source metadata in Arrow IPC binary columns. Store source metadata in a simpler, queryable
__datasetstable with six fields:index,name,info,tasks,subtasks, andstats. Task/subtask ID-to-text mappings use typed arrays of rows;infoandstatscontain the original source JSON objects.Derive source episode/frame ranges and FPS from the original counts and FPS in
info, removing duplicate range/FPS columns. Frame and Episodedataset_indexvalues reference__datasets.index; the training reader preserves source selection, source-local Episode IDs, and mixed-FPS support, including reads of existing table groups using legacy metadata names or IPC archive columns.Remove Episode schema/patch archives. Compatible Episode extension columns shared by every source remain typed columns; source-specific extension columns and original Arrow schemas are no longer archived. This PR is independent of #11070.
Tests
git diff --checkpassed.