Revert "fix(deps): breaking change from transformers 5.4.0"#3249
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imstevenpmwork merged 2 commits intomainfrom Mar 30, 2026
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Revert "fix(deps): breaking change from transformers 5.4.0"#3249imstevenpmwork merged 2 commits intomainfrom
imstevenpmwork merged 2 commits intomainfrom
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This reverts commit 0750286.
samet-akcay
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Apr 1, 2026
lerobot v0.5.x moved check_delta_timestamps, get_delta_indices, dataset_to_policy_features, build_dataset_frame, and combine_feature_dicts from lerobot.datasets.utils to lerobot.datasets.feature_utils. Also document why transformers is pinned to <5.4.0: upstream lerobot reverted 5.4.0 support and pinned to ==5.3.0 (huggingface/lerobot#3249) because 5.4.0 breaks pi0/pi0fast action generation.
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Reverts #3231
The transformers 5.4.0 update brought some unexpected behavior changes to
PaligemmaandGemmathat unfortunately broke our Pi0 policy family. To keep things running smoothly for our users while we track down the issue (and wait for an upstream patch), I'm reverting this PR and pinning transformers to5.3.0. We'll unpin once everything is fully resolved.CI Full test run: https://github.com/huggingface/lerobot/actions/runs/23757315034