[BUG] Cityscapes importer not reading train_extra images · voxel51/fiftyone#5605

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buggood first issue

説明

Describe the problem

The train_extra split is not parsed by fiftyone. Looking at fiftyone/utils/cityscapes.py there seems to be no handling for this split.

Code to reproduce issue

fiftyone zoo datasets load cityscapes -k source_dir=.

With PWD having: gtCoarse.zip gtFine_trainvaltest.zip leftImg8bit_trainextra.zip leftImg8bit_trainvaltest.zip

System information

OS Platform and Distribution (e.g., Linux Ubuntu 22.04): Arch Linux Rolling
Python version (python --version): 3.11-3.13
FiftyOne version (fiftyone --version): 1.4
FiftyOne installed from (pip or source): pip

Willingness to contribute

The FiftyOne Community encourages bug fix contributions. Would you or another member of your organization be willing to contribute a fix for this bug to the FiftyOne codebase?

Yes. I can contribute a fix for this bug independently
Yes. I would be willing to contribute a fix for this bug with guidance from the FiftyOne community
No. I cannot contribute a bug fix at this time

I am already working on a fix, will post PR soon.

コントリビューターガイド

技術スタック: python
領域: databackend
Issue 種別: bug
難度: 2
推定時間: 1-3 hours
活動状況: fresh
明確さ: clear
前提条件: PythonCityscapes dataset structure
初心者向け度: 70
調査方針: Examine `fiftyone/utils/cityscapes.py` to find where splits like `train`, `val`, `test` are handled. Add similar logic for the `train extra` split, which is currently missing. The fix should parse `leftImg8bit trainextra.zip` and `gtCoarse.zip` accordingly. Review existing split parsing for patterns to replicate.