Adding integration with Label Studio

.github/CODEOWNERS

@@ -26,3 +26,4 @@
 /.github/*.md                   @edenlightning @ethanwharris @ananyahjha93
 /.github/ISSUE_TEMPLATE/*.md    @edenlightning @ethanwharris @ananyahjha93
 /docs/source/conf.py            @borda @ethanwharris @ananyahjha93
+/flash/core/integrations/labelstudio	@KonstantinKorotaev @niklub

CHANGELOG.md

@@ -8,6 +8,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ### Added
 
+- Added `LabelStudio` integration ([#554](https://github.com/PyTorchLightning/lightning-flash/pull/554))
+
 - Added support `learn2learn` training_strategy for `ImageClassifier` ([#737](https://github.com/PyTorchLightning/lightning-flash/pull/737))
 
 - Added `vissl` training_strategies for `ImageEmbedder` ([#682](https://github.com/PyTorchLightning/lightning-flash/pull/682))

flash/core/data/data_module.py

@@ -1246,3 +1246,128 @@ def from_fiftyone(
             num_workers=num_workers,
             **preprocess_kwargs,
         )
+
+    @classmethod
+    def from_labelstudio(
+        cls,
+        export_json: str = None,
+        train_export_json: str = None,
+        val_export_json: str = None,
+        test_export_json: str = None,
+        predict_export_json: str = None,
+        data_folder: str = None,
+        train_data_folder: str = None,
+        val_data_folder: str = None,
+        test_data_folder: str = None,
+        predict_data_folder: str = None,
+        train_transform: Optional[Dict[str, Callable]] = None,
+        val_transform: Optional[Dict[str, Callable]] = None,
+        test_transform: Optional[Dict[str, Callable]] = None,
+        predict_transform: Optional[Dict[str, Callable]] = None,
+        data_fetcher: Optional[BaseDataFetcher] = None,
+        preprocess: Optional[Preprocess] = None,
+        val_split: Optional[float] = None,
+        batch_size: int = 4,
+        num_workers: Optional[int] = None,
+        **preprocess_kwargs: Any,
+    ) -> "DataModule":
+        """Creates a :class:`~flash.core.data.data_module.DataModule` object
+        from the given export file and data directory using the
+        :class:`~flash.core.data.data_source.DataSource` of name
+        :attr:`~flash.core.data.data_source.DefaultDataSources.FOLDERS`
+        from the passed or constructed :class:`~flash.core.data.process.Preprocess`.
+
+        Args:
+            export_json: path to label studio export file
+            train_export_json: path to label studio export file for train set,
+            overrides export_json if specified
+            val_export_json: path to label studio export file for validation
+            test_export_json: path to label studio export file for test
+            predict_export_json: path to label studio export file for predict
+            data_folder: path to label studio data folder
+            train_data_folder: path to label studio data folder for train data set,
+            overrides data_folder if specified
+            val_data_folder: path to label studio data folder for validation data
+            test_data_folder: path to label studio data folder for test data
+            predict_data_folder: path to label studio data folder for predict data
+            train_transform: The dictionary of transforms to use during training which maps
+                :class:`~flash.core.data.process.Preprocess` hook names to callable transforms.
+            val_transform: The dictionary of transforms to use during validation which maps
+                :class:`~flash.core.data.process.Preprocess` hook names to callable transforms.
+            test_transform: The dictionary of transforms to use during testing which maps
+                :class:`~flash.core.data.process.Preprocess` hook names to callable transforms.
+            predict_transform: The dictionary of transforms to use during predicting which maps
+                :class:`~flash.core.data.process.Preprocess` hook names to callable transforms.
+            data_fetcher: The :class:`~flash.core.data.callback.BaseDataFetcher` to pass to the
+                :class:`~flash.core.data.data_module.DataModule`.
+            preprocess: The :class:`~flash.core.data.data.Preprocess` to pass to the
+                :class:`~flash.core.data.data_module.DataModule`. If ``None``, ``cls.preprocess_cls``
+                will be constructed and used.
+            val_split: The ``val_split`` argument to pass to the :class:`~flash.core.data.data_module.DataModule`.
+            batch_size: The ``batch_size`` argument to pass to the :class:`~flash.core.data.data_module.DataModule`.
+            num_workers: The ``num_workers`` argument to pass to the :class:`~flash.core.data.data_module.DataModule`.
+            preprocess_kwargs: Additional keyword arguments to use when constructing the preprocess. Will only be used
+                if ``preprocess = None``.
+
+        Returns:
+            The constructed data module.
+
+        Examples::
+
+            data_module = DataModule.from_labelstudio(
+                export_json='project.json',
+                data_folder='label-studio/media/upload',
+                val_split=0.8,
+            )
+        """
+        data = {
+            "data_folder": data_folder,
+            "export_json": export_json,
+            "split": val_split,
+            "multi_label": preprocess_kwargs.get("multi_label", False),
+        }
+        train_data = None
+        val_data = None
+        test_data = None
+        predict_data = None
+        if (train_data_folder or data_folder) and train_export_json:
+            train_data = {
+                "data_folder": train_data_folder or data_folder,
+                "export_json": train_export_json,
+                "multi_label": preprocess_kwargs.get("multi_label", False),
+            }
+        if (val_data_folder or data_folder) and val_export_json:
+            val_data = {
+                "data_folder": val_data_folder or data_folder,
+                "export_json": val_export_json,
+                "multi_label": preprocess_kwargs.get("multi_label", False),
+            }
+        if (test_data_folder or data_folder) and test_export_json:
+            test_data = {
+                "data_folder": test_data_folder or data_folder,
+                "export_json": test_export_json,
+                "multi_label": preprocess_kwargs.get("multi_label", False),
+            }
+        if (predict_data_folder or data_folder) and predict_export_json:
+            predict_data = {
+                "data_folder": predict_data_folder or data_folder,
+                "export_json": predict_export_json,
+                "multi_label": preprocess_kwargs.get("multi_label", False),
+            }
+        return cls.from_data_source(
+            DefaultDataSources.LABELSTUDIO,
+            train_data=train_data if train_data else data,
+            val_data=val_data,
+            test_data=test_data,
+            predict_data=predict_data,
+            train_transform=train_transform,
+            val_transform=val_transform,
+            test_transform=test_transform,
+            predict_transform=predict_transform,
+            data_fetcher=data_fetcher,
+            preprocess=preprocess,
+            val_split=val_split,
+            batch_size=batch_size,
+            num_workers=num_workers,
+            **preprocess_kwargs,
+        )

flash/core/data/data_source.py

@@ -160,6 +160,7 @@ class DefaultDataSources(LightningEnum):
     JSON = "json"
     DATASETS = "datasets"
     FIFTYONE = "fiftyone"
+    LABELSTUDIO = "labelstudio"
 
     # TODO: Create a FlashEnum class???
     def __hash__(self) -> int: