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[pycocotools] Accept lists of RLEs in mask.decode, area and toBbox - #16577
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Diff from mypy_primer, showing the effect of this PR on open source code: scipy-stubs (https://github.com/scipy/scipy-stubs)
- tests/misc/test_submodules_empty.pyi:3: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
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srittau
approved these changes
Oct 20, 2026
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pycocotools.mask.decode,areaandtoBboxwere typed to take a single encoded RLE, but each also accepts a list of RLEs (the batch form returned byfrPyObjectsand used for multi-instance masks), so those calls were rejected.This widens the three parameters to
_EncodedRLE | list[_EncodedRLE], with an overload onareabecause it returns an array of areas for a list and a singleuint32otherwise.Upstream source (pycocotools 2.0.11): https://github.com/ppwwyyxx/cocoapi/blob/ac87f5077ad6b8864c2dc5e93d14cae62d1db05a/PythonAPI/pycocotools/mask.py#L87-L103
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