Add PythonicWorkflow

monai/bundle/__init__.py

@@ -43,4 +43,4 @@
     MACRO_KEY,
     load_bundle_config,
 )
-from .workflows import BundleWorkflow, ConfigWorkflow
+from .workflows import BundleWorkflow, ConfigWorkflow, PythonicWorkflow

monai/bundle/workflows.py

@@ -44,12 +44,18 @@ class BundleWorkflow(ABC):
         workflow_type: specifies the workflow type: "train" or "training" for a training workflow,
             or "infer", "inference", "eval", "evaluation" for a inference workflow,
             other unsupported string will raise a ValueError.
-            default to `train` for train workflow.
+            default to `None` for only using meta properties.
         workflow: specifies the workflow type: "train" or "training" for a training workflow,
             or "infer", "inference", "eval", "evaluation" for a inference workflow,
             other unsupported string will raise a ValueError.
             default to `None` for common workflow.
-        properties_path: the path to the JSON file of properties.
+        properties_path: the path to the JSON file of properties. If `workflow_type` is specified, properties will be
+            loaded from the file based on the provided `workflow_type` and meta. If no `workflow_type` is specified,
+            properties will default to loading from "meta". If the specified file is unavailable, default properties
+            will be sourced from "monai/bundle/properties.py" based on the workflow_type:
+            For a training workflow, properties load from `TrainProperties` and `MetaProperties`.
+            For a inference workflow, properties load from `InferProperties` and `MetaProperties`.
+            For workflow_type = None : only `MetaProperties` will be loaded.
         meta_file: filepath of the metadata file, if this is a list of file paths, their contents will be merged in order.
         logging_file: config file for `logging` module in the program. for more details:
             https://docs.python.org/3/library/logging.config.html#logging.config.fileConfig.
@@ -97,29 +103,50 @@ def __init__(
                         meta_file = None
 
         workflow_type = workflow if workflow is not None else workflow_type
-        if workflow_type is None and properties_path is None:
-            self.properties = copy(MetaProperties)
-            self.workflow_type = None
-            self.meta_file = meta_file
-            return
+        if workflow_type is not None:
+            if workflow_type.lower() in self.supported_train_type:
+                workflow_type = "train"
+            elif workflow_type.lower() in self.supported_infer_type:
+                workflow_type = "infer"
+            else:
+                raise ValueError(f"Unsupported workflow type: '{workflow_type}'.")
+
         if properties_path is not None:
             properties_path = Path(properties_path)
             if not properties_path.is_file():
                 raise ValueError(f"Property file {properties_path} does not exist.")
             with open(properties_path) as json_file:
-                self.properties = json.load(json_file)
-            self.workflow_type = None
-            self.meta_file = meta_file
-            return
-        if workflow_type.lower() in self.supported_train_type:  # type: ignore[union-attr]
-            self.properties = {**TrainProperties, **MetaProperties}
-            self.workflow_type = "train"
-        elif workflow_type.lower() in self.supported_infer_type:  # type: ignore[union-attr]
-            self.properties = {**InferProperties, **MetaProperties}
-            self.workflow_type = "infer"
+                try:
+                    properties = json.load(json_file)
+                    self.properties: dict = {}
+                    if workflow_type is not None and workflow_type in properties:
+                        self.properties = properties[workflow_type]
+                        if "meta" in properties:
+                            self.properties.update(properties["meta"])
+                    elif workflow_type is None:
+                        if "meta" in properties:
+                            self.properties = properties["meta"]
+                            logger.info(
+                                "No workflow type specified, default to load meta properties from property file."
+                            )
+                        else:
+                            logger.warning("No 'meta' key found in properties while workflow_type is None.")
+                except KeyError as e:
+                    raise ValueError(f"{workflow_type} not found in property file {properties_path}") from e
+                except json.JSONDecodeError as e:
+                    raise ValueError(f"Error decoding JSON from property file {properties_path}") from e
         else:
-            raise ValueError(f"Unsupported workflow type: '{workflow_type}'.")
+            if workflow_type == "train":
+                self.properties = {**TrainProperties, **MetaProperties}
+            elif workflow_type == "infer":
+                self.properties = {**InferProperties, **MetaProperties}
+            elif workflow_type is None:
+                self.properties = copy(MetaProperties)
+                logger.info("No workflow type and property file specified, default to 'meta' properties.")
+            else:
+                raise ValueError(f"Unsupported workflow type: '{workflow_type}'.")
 
+        self.workflow_type = workflow_type
         self.meta_file = meta_file
 
     @abstractmethod
@@ -226,6 +253,124 @@ def check_properties(self) -> list[str] | None:
         return [n for n, p in self.properties.items() if p.get(BundleProperty.REQUIRED, False) and not hasattr(self, n)]
 
 
+class PythonicWorkflow(BundleWorkflow):
+    """
+    Base class for the pythonic workflow specification in bundle, it can be a training, evaluation or inference workflow.
+    It defines the basic interfaces for the bundle workflow behavior: `initialize`, `finalize`, etc.
+    This also provides the interface to get / set public properties to interact with a bundle workflow through
+    defined `get_<property>` accessor methods or directly defining members of the object.
+    For how to set the properties, users can define the `_set_<property>` methods or directly set the members of the object.
+    The `initialize` method is called to set up the workflow before running. This method sets up internal state
+    and prepares properties. If properties are modified after the workflow has been initialized, `self._is_initialized`
+    is set to `False`. Before running the workflow again, `initialize` should be called to ensure that the workflow is
+    properly set up with the new property values.
+
+    Args:
+        workflow_type: specifies the workflow type: "train" or "training" for a training workflow,
+            or "infer", "inference", "eval", "evaluation" for a inference workflow,
+            other unsupported string will raise a ValueError.
+            default to `None` for only using meta properties.
+        workflow: specifies the workflow type: "train" or "training" for a training workflow,
+            or "infer", "inference", "eval", "evaluation" for a inference workflow,
+            other unsupported string will raise a ValueError.
+            default to `None` for common workflow.
+        properties_path: the path to the JSON file of properties. If `workflow_type` is specified, properties will be
+            loaded from the file based on the provided `workflow_type` and meta. If no `workflow_type` is specified,
+            properties will default to loading from "meta". If the specified file is unavailable, default properties
+            will be sourced from "monai/bundle/properties.py" based on the workflow_type:
+            For a training workflow, properties load from `TrainProperties` and `MetaProperties`.
+            For a inference workflow, properties load from `InferProperties` and `MetaProperties`.
+            For workflow_type = None : only `MetaProperties` will be loaded.
+        config_file: path to the config file, typically used to store hyperparameters.
+        meta_file: filepath of the metadata file, if this is a list of file paths, their contents will be merged in order.
+        logging_file: config file for `logging` module in the program. for more details:
+            https://docs.python.org/3/library/logging.config.html#logging.config.fileConfig.
+
+    """
+
+    supported_train_type: tuple = ("train", "training")
+    supported_infer_type: tuple = ("infer", "inference", "eval", "evaluation")
+
+    def __init__(
+        self,
+        workflow_type: str | None = None,
+        properties_path: PathLike | None = None,
+        config_file: str | Sequence[str] | None = None,
+        meta_file: str | Sequence[str] | None = None,
+        logging_file: str | None = None,
+        **override: Any,
+    ):
+        meta_file = str(Path(os.getcwd()) / "metadata.json") if meta_file is None else meta_file
+        super().__init__(
+            workflow_type=workflow_type, properties_path=properties_path, meta_file=meta_file, logging_file=logging_file
+        )
+        self._props_vals: dict = {}
+        self._set_props_vals: dict = {}
+        self.parser = ConfigParser()
+        if config_file is not None:
+            self.parser.read_config(f=config_file)
+        if self.meta_file is not None:
+            self.parser.read_meta(f=self.meta_file)
+
+        # the rest key-values in the _args are to override config content
+        self.parser.update(pairs=override)
+        self._is_initialized: bool = False
+
+    def initialize(self, *args: Any, **kwargs: Any) -> Any:
+        """
+        Initialize the bundle workflow before running.
+        """
+        self._props_vals = {}
+        self._is_initialized = True
+
+    def _get_property(self, name: str, property: dict) -> Any:
+        """
+        With specified property name and information, get the expected property value.
+        If the property is already generated, return from the bucket directly.
+        If user explicitly set the property, return it directly.
+        Otherwise, generate the expected property as a class private property with prefix "_".
+
+        Args:
+            name: the name of target property.
+            property: other information for the target property, defined in `TrainProperties` or `InferProperties`.
+        """
+        if not self._is_initialized:
+            raise RuntimeError("Please execute 'initialize' before getting any properties.")
+        value = None
+        if name in self._set_props_vals:
+            value = self._set_props_vals[name]
+        elif name in self._props_vals:
+            value = self._props_vals[name]
+        elif name in self.parser.config[self.parser.meta_key]:  # type: ignore[index]
+            id = self.properties.get(name, None).get(BundlePropertyConfig.ID, None)
+            value = self.parser[id]
+        else:
+            try:
+                value = getattr(self, f"get_{name}")()
+            except AttributeError as e:
+                if property[BundleProperty.REQUIRED]:
+                    raise ValueError(
+                        f"unsupported property '{name}' is required in the bundle properties,"
+                        f"need to implement a method 'get_{name}' to provide the property."
+                    ) from e
+            self._props_vals[name] = value
+        return value
+
+    def _set_property(self, name: str, property: dict, value: Any) -> Any:
+        """
+        With specified property name and information, set value for the expected property.
+        Stores user-reset initialized objects that should not be re-initialized and marks the workflow as not initialized.
+
+        Args:
+            name: the name of target property.
+            property: other information for the target property, defined in `TrainProperties` or `InferProperties`.
+            value: value to set for the property.
+
+        """
+        self._set_props_vals[name] = value
+        self._is_initialized = False
+
+
 class ConfigWorkflow(BundleWorkflow):
     """
     Specification for the config-based bundle workflow.
@@ -262,7 +407,13 @@ class ConfigWorkflow(BundleWorkflow):
             or "infer", "inference", "eval", "evaluation" for a inference workflow,
             other unsupported string will raise a ValueError.
             default to `None` for common workflow.
-        properties_path: the path to the JSON file of properties.
+        properties_path: the path to the JSON file of properties. If `workflow_type` is specified, properties will be
+            loaded from the file based on the provided `workflow_type` and meta. If no `workflow_type` is specified,
+            properties will default to loading from "train". If the specified file is unavailable, default properties
+            will be sourced from "monai/bundle/properties.py" based on the workflow_type:
+            For a training workflow, properties load from `TrainProperties` and `MetaProperties`.
+            For a inference workflow, properties load from `InferProperties` and `MetaProperties`.
+            For workflow_type = None : only `MetaProperties` will be loaded.
         override: id-value pairs to override or add the corresponding config content.
             e.g. ``--net#input_chns 42``, ``--net %/data/other.json#net_arg``
 
@@ -324,7 +475,6 @@ def __init__(
         self.parser.read_config(f=config_file)
         if self.meta_file is not None:
             self.parser.read_meta(f=self.meta_file)
-
         # the rest key-values in the _args are to override config content
         self.parser.update(pairs=override)
         self.init_id = init_id

monai/utils/module.py

@@ -649,7 +649,7 @@ def compute_capabilities_after(major: int, minor: int = 0, current_ver_string: s
         current_ver_string: if None, the current system GPU CUDA compute capability will be used.
 
     Returns:
-        True if the current system GPU CUDA compute capability is greater than the specified version.
+        True if the current system GPU CUDA compute capability is greater than or equal to the specified version.
     """
     if current_ver_string is None:
         cuda_available = torch.cuda.is_available()
@@ -667,11 +667,11 @@ def compute_capabilities_after(major: int, minor: int = 0, current_ver_string: s
 
     ver, has_ver = optional_import("packaging.version", name="parse")
     if has_ver:
-        return ver(".".join((f"{major}", f"{minor}"))) < ver(f"{current_ver_string}")  # type: ignore
+        return ver(".".join((f"{major}", f"{minor}"))) <= ver(f"{current_ver_string}")  # type: ignore
     parts = f"{current_ver_string}".split("+", 1)[0].split(".", 2)
     while len(parts) < 2:
         parts += ["0"]
     c_major, c_minor = parts[:2]
     c_mn = int(c_major), int(c_minor)
     mn = int(major), int(minor)
-    return c_mn >= mn
+    return c_mn > mn

tests/nonconfig_workflow.py

@@ -13,7 +13,7 @@
 
 import torch
 
-from monai.bundle import BundleWorkflow
+from monai.bundle import BundleWorkflow, PythonicWorkflow
 from monai.data import DataLoader, Dataset
 from monai.engines import SupervisedEvaluator
 from monai.inferers import SlidingWindowInferer
@@ -26,8 +26,9 @@
     LoadImaged,
     SaveImaged,
     ScaleIntensityd,
+    ScaleIntensityRanged,
 )
-from monai.utils import BundleProperty, set_determinism
+from monai.utils import BundleProperty, CommonKeys, set_determinism
 
 
 class NonConfigWorkflow(BundleWorkflow):
@@ -176,3 +177,62 @@ def _set_property(self, name, property, value):
             self._numpy_version = value
         elif property[BundleProperty.REQUIRED]:
             raise ValueError(f"unsupported property '{name}' is required in the bundle properties.")
+
+
+class PythonicWorkflowImpl(PythonicWorkflow):
+    """
+    Test class simulates the bundle workflow defined by Python script directly.
+    """
+
+    def __init__(
+        self,
+        workflow_type: str = "inference",
+        config_file: str | None = None,
+        properties_path: str | None = None,
+        meta_file: str | None = None,
+    ):
+        super().__init__(
+            workflow_type=workflow_type, properties_path=properties_path, config_file=config_file, meta_file=meta_file
+        )
+        self.dataflow: dict = {}
+
+    def initialize(self):
+        self._props_vals = {}
+        self._is_initialized = True
+        self.net = UNet(
+            spatial_dims=3,
+            in_channels=1,
+            out_channels=2,
+            channels=(16, 32, 64, 128),
+            strides=(2, 2, 2),
+            num_res_units=2,
+        ).to(self.device)
+        preprocessing = Compose(
+            [
+                EnsureChannelFirstd(keys=["image"]),
+                ScaleIntensityd(keys="image"),
+                ScaleIntensityRanged(keys="image", a_min=-57, a_max=164, b_min=0.0, b_max=1.0, clip=True),
+            ]
+        )
+        self.dataset = Dataset(data=[self.dataflow], transform=preprocessing)
+        self.postprocessing = Compose([Activationsd(keys="pred", softmax=True), AsDiscreted(keys="pred", argmax=True)])
+
+    def run(self):
+        data = self.dataset[0]
+        inputs = data[CommonKeys.IMAGE].unsqueeze(0).to(self.device)
+        self.net.eval()
+        with torch.no_grad():
+            data[CommonKeys.PRED] = self.inferer(inputs, self.net)
+        self.dataflow.update({CommonKeys.PRED: self.postprocessing(data)[CommonKeys.PRED]})
+
+    def finalize(self):
+        pass
+
+    def get_bundle_root(self):
+        return "."
+
+    def get_device(self):
+        return torch.device("cuda" if torch.cuda.is_available() else "cpu")
+
+    def get_inferer(self):
+        return SlidingWindowInferer(roi_size=self.parser.roi_size, sw_batch_size=1, overlap=0)

tests/test_bundle_trt_export.py

@@ -53,7 +53,7 @@
 @skip_if_windows
 @skip_if_no_cuda
 @skip_if_quick
-@SkipIfBeforeComputeCapabilityVersion((7, 0))
+@SkipIfBeforeComputeCapabilityVersion((7, 5))
 class TestTRTExport(unittest.TestCase):
 
     def setUp(self):