Support latest version of BaaL (1.5.2) and add necessary utilities

.github/workflows/ci-testing.yml

@@ -33,6 +33,7 @@ jobs:
           - { os: 'ubuntu-20.04', python-version: 3.9, requires: 'latest', release: 'pre', topic: [ 'core' ] }
           - { os: 'ubuntu-20.04', python-version: 3.9, requires: 'latest', release: 'stable', topic: [ 'image' ] }
           - { os: 'ubuntu-20.04', python-version: 3.9, requires: 'latest', release: 'stable', topic: [ 'image','image_extras' ] }
+          - { os: 'ubuntu-20.04', python-version: 3.9, requires: 'latest', release: 'stable', topic: [ 'image', image_extras_baal' ] }
           - { os: 'ubuntu-20.04', python-version: 3.9, requires: 'latest', release: 'stable', topic: [ 'video' ] }
           - { os: 'ubuntu-20.04', python-version: 3.9, requires: 'latest', release: 'stable', topic: [ 'video','video_extras' ] }
           - { os: 'ubuntu-20.04', python-version: 3.9, requires: 'latest', release: 'stable', topic: [ 'tabular' ] }

CHANGELOG.md

@@ -22,6 +22,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ### Fixed
 
+- Fixed support for all the versions (including the latest and older) of `baal`. ([#1315](https://github.com/PyTorchLightning/lightning-flash/pull/1315))
+
 - Fixed a bug where a loaded `TabularClassifier` or `TabularRegressor` checkpoint could not be served ([#1324](https://github.com/PyTorchLightning/lightning-flash/pull/1324))
 
 ## [0.7.4] - 2022-04-27

flash/core/utilities/imports.py

@@ -17,8 +17,9 @@
 import os
 import types
 from importlib.util import find_spec
-from typing import List, Tuple, Union
+from typing import Callable, List, Tuple, Union
 
+import pkg_resources
 from pkg_resources import DistributionNotFound
 
 try:
@@ -48,21 +49,29 @@ def _module_available(module_path: str) -> bool:
         return True
 
 
-def _compare_version(package: str, op, version) -> bool:
+def _compare_version(package: str, op: Callable, version: str, use_base_version: bool = False) -> bool:
     """Compare package version with some requirements.
 
     >>> _compare_version("torch", operator.ge, "0.1")
     True
+    >>> _compare_version("does_not_exist", operator.ge, "0.0")
+    False
     """
     try:
         pkg = importlib.import_module(package)
-    except (ModuleNotFoundError, DistributionNotFound, ValueError):
+    except (ImportError, DistributionNotFound):
         return False
     try:
-        pkg_version = Version(pkg.__version__)
+        if hasattr(pkg, "__version__"):
+            pkg_version = Version(pkg.__version__)
+        else:
+            # try pkg_resources to infer version
+            pkg_version = Version(pkg_resources.get_distribution(package).version)
     except TypeError:
-        # this is mock by sphinx, so it shall return True to generate all summaries
+        # this is mocked by Sphinx, so it should return True to generate all summaries
         return True
+    if use_base_version:
+        pkg_version = Version(pkg_version.base_version)
     return op(pkg_version, Version(version))
 
 
@@ -128,6 +137,7 @@ class Image:
     _PANDAS_GREATER_EQUAL_1_3_0 = _compare_version("pandas", operator.ge, "1.3.0")
     _ICEVISION_GREATER_EQUAL_0_11_0 = _compare_version("icevision", operator.ge, "0.11.0")
     _TM_GREATER_EQUAL_0_7_0 = _compare_version("torchmetrics", operator.ge, "0.7.0")
+    _BAAL_GREATER_EQUAL_1_5_2 = _compare_version("baal", operator.ge, "1.5.2")
 
 _TEXT_AVAILABLE = all(
     [

flash/image/classification/integrations/baal/dropout.py

@@ -15,10 +15,20 @@
 from pytorch_lightning.utilities.exceptions import MisconfigurationException
 
 import flash
-from flash.core.utilities.imports import _BAAL_AVAILABLE
+from flash.core.utilities.imports import _BAAL_AVAILABLE, _BAAL_GREATER_EQUAL_1_5_2
 
 if _BAAL_AVAILABLE:
-    from baal.bayesian.dropout import _patch_dropout_layers
+    # _patch_dropout_layers function was replaced with replace_layers_in_module helper
+    # function in v1.5.2 (https://github.com/ElementAI/baal/pull/194 for more details)
+    if _BAAL_GREATER_EQUAL_1_5_2:
+        from baal.bayesian.common import replace_layers_in_module
+        from baal.bayesian.consistent_dropout import _consistent_dropout_mapping_fn
+
+        def _patch_dropout_layers(module: torch.nn.Module):
+            return replace_layers_in_module(module, _consistent_dropout_mapping_fn)
+
+    else:
+        from baal.bayesian.consistent_dropout import _patch_dropout_layers
 
 
 class InferenceMCDropoutTask(flash.Task):

requirements/datatype_image_extras.txt

@@ -7,8 +7,6 @@ icedata
 effdet
 albumentations
 learn2learn
-structlog==21.1.0   # remove when baal resolved its dependency.
-baal
 fastface
 fairscale
 

requirements/datatype_image_extras_baal.txt

@@ -0,0 +1,2 @@
+# This is a separate file, as baal integration is affected by vissl installation (conflicts)
+baal>=1.3.2

tests/image/classification/test_active_learning.py

@@ -22,7 +22,7 @@
 from torch.utils.data import SequentialSampler
 
 import flash
-from flash.core.utilities.imports import _BAAL_AVAILABLE, _IMAGE_AVAILABLE
+from flash.core.utilities.imports import _BAAL_AVAILABLE, _BAAL_GREATER_EQUAL_1_5_2, _IMAGE_AVAILABLE
 from flash.image import ImageClassificationData, ImageClassifier
 from flash.image.classification.integrations.baal import ActiveLearningDataModule, ActiveLearningLoop
 from tests.image.classification.test_data import _rand_image
@@ -110,6 +110,8 @@ def test_active_learning_training(simple_datamodule, initial_num_labels, query_s
         assert len(active_learning_dm._dataset) == 20
     assert active_learning_loop.progress.total.completed == 3
     labelled = active_learning_loop.state_dict()["state_dict"]["datamodule_state_dict"]["labelled"]
+    if _BAAL_GREATER_EQUAL_1_5_2:
+        labelled = labelled > 0
     assert isinstance(labelled, np.ndarray)
 
     # Check that we iterate over the actual pool and that shuffle is disabled.