handle inference parameters

kedro_mlflow/framework/hooks/mlflow_hook.py

@@ -371,6 +371,7 @@ def after_pipeline_run(
                         pipeline=pipeline.inference,
                         catalog=catalog,
                         input_name=pipeline.input_name,
+                        params_input_name=pipeline.params_input_name,
                         **pipeline.kpm_kwargs,
                     )
                     artifacts = kedro_pipeline_model.extract_pipeline_artifacts(

kedro_mlflow/mlflow/kedro_pipeline_model.py

@@ -1,6 +1,6 @@
 import logging
 from pathlib import Path
-from typing import Dict, Optional, Union
+from typing import Dict, Optional, Union, Any
 
 from kedro.framework.hooks import _create_hook_manager
 from kedro.io import DataCatalog, MemoryDataset
@@ -20,6 +20,7 @@ def __init__(
         input_name: str,
         runner: Optional[AbstractRunner] = None,
         copy_mode: Optional[Union[Dict[str, str], str]] = "assign",
+        params_input_name: Optional[str] = None,
     ):
         """[summary]
 
@@ -30,6 +31,8 @@ def __init__(
             catalog (DataCatalog): The DataCatalog associated
             to the PipelineMl
 
+            input_name (str): TODO
+
             runner (Optional[AbstractRunner], optional): The kedro
             AbstractRunner to use. Defaults to SequentialRunner if
             None.
@@ -45,12 +48,16 @@ def __init__(
                 - a dictionary with (dataset name, copy_mode) key/values
                 pairs. The associated mode must be a valid kedro mode
                 ("deepcopy", "copy" and "assign") for each. Defaults to None.
+
+            params_input_name (Optional[str]): TODO
+
         """
 
         self.pipeline = (
             pipeline.inference if isinstance(pipeline, PipelineML) else pipeline
         )
         self.input_name = input_name
+        self.params_input_name = params_input_name
         self.initial_catalog = self._extract_pipeline_catalog(catalog)
 
         nb_outputs = len(self.pipeline.outputs())
@@ -107,7 +114,7 @@ def copy_mode(self, copy_mode):
     def _extract_pipeline_catalog(self, catalog: DataCatalog) -> DataCatalog:
         sub_catalog = DataCatalog()
         for dataset_name in self.pipeline.inputs():
-            if dataset_name == self.input_name:
+            if dataset_name in (self.input_name, self.params_input_name):
                 # there is no obligation that this dataset is persisted
                 # and even if it is, we keep only an ampty memory dataset to avoid
                 # extra uneccessary dependencies: this dataset will be replaced at
@@ -145,7 +152,7 @@ def extract_pipeline_artifacts(
     ):
         artifacts = {}
         for name, dataset in self.initial_catalog._datasets.items():
-            if name != self.input_name:
+            if name not in (self.input_name, self.params_input_name):
                 if name.startswith("params:"):
                     # we need to persist it locally for mlflow access
                     absolute_param_path = (
@@ -177,7 +184,9 @@ def load_context(self, context):
         # but we rely on a mlflow function for saving, and it is unaware of kedro
         # pipeline structure
         mlflow_artifacts_keys = set(context.artifacts.keys())
-        kedro_artifacts_keys = set(self.pipeline.inputs() - {self.input_name})
+        kedro_artifacts_keys = set(
+            self.pipeline.inputs() - {self.input_name, self.params_input_name}
+        )
         if mlflow_artifacts_keys != kedro_artifacts_keys:
             in_artifacts_but_not_inference = (
                 mlflow_artifacts_keys - kedro_artifacts_keys
@@ -196,7 +205,7 @@ def load_context(self, context):
             updated_catalog._datasets[name]._filepath = Path(uri)
             self.loaded_catalog.save(name=name, data=updated_catalog.load(name))
 
-    def predict(self, context, model_input):
+    def predict(self, context, model_input, params: Optional[dict[str, Any]] = None):
         # we create an empty hook manager but do NOT register hooks
         # because we want this model be executable outside of a kedro project
         hook_manager = _create_hook_manager()
@@ -206,6 +215,9 @@ def predict(self, context, model_input):
             data=model_input,
         )
 
+        if self.params_input_name:
+            self.loaded_catalog.save(name=self.params_input_name, data=params)
+
         run_output = self.runner.run(
             pipeline=self.pipeline,
             catalog=self.loaded_catalog,

kedro_mlflow/pipeline/pipeline_ml.py

@@ -52,6 +52,7 @@ def __init__(
         input_name: str,
         kpm_kwargs: Optional[Dict[str, str]] = None,
         log_model_kwargs: Optional[Dict[str, str]] = None,
+        params_input_name: Optional[str] = None,
     ):
         """Store all necessary information for calling mlflow.log_model in the pipeline.
 
@@ -65,9 +66,9 @@ def __init__(
                 stored in mlflow and use the output(s)
                 of the training pipeline (namely, the model)
                 to predict the outcome.
-            input_name (str, optional): The name of the dataset in
+            input_name (str): The name of the dataset in
                 the catalog.yml which the model's user must provide
-                for prediction (i.e. the data). Defaults to None.
+                for prediction (i.e. the data).
             kpm_kwargs:
                 extra arguments to be passed to `KedroPipelineModel`
                 when the PipelineML object is automatically saved at the end of a run.
@@ -79,13 +80,15 @@ def __init__(
                 extra arguments to be passed to `mlflow.pyfunc.log_model`, e.g.:
                     - "signature" accepts an extra "auto" which automatically infer the signature
                     based on "input_name" dataset
+            params_input_name (str, optional): TODO
 
         """
 
         super().__init__(nodes, *args, tags=tags)
 
         self.inference = inference
         self.input_name = input_name
+        self.params_input_name = params_input_name
         # they will be passed to KedroPipelineModel to enable flexibility
 
         kpm_kwargs = kpm_kwargs or {}
@@ -104,7 +107,7 @@ def training(self) -> Pipeline:
         return Pipeline(self.nodes)
 
     @property
-    def inference(self) -> str:
+    def inference(self) -> Pipeline:
         return self._inference
 
     @inference.setter
@@ -127,6 +130,22 @@ def input_name(self, name: str) -> None:
             )
         self._input_name = name
 
+    @property
+    def params_input_name(self) -> str | None:
+        return self._params_input_name
+
+    @params_input_name.setter
+    def params_input_name(self, name: str | None) -> None:
+        if name is not None:
+            allowed_names = self.inference.inputs()
+            pp_allowed_names = "\n    - ".join(allowed_names)
+            if name not in allowed_names:
+                raise KedroMlflowPipelineMLError(
+                    f"params_input_name='{name}' but it must be an input of 'inference'"
+                    f", i.e. one of: \n    - {pp_allowed_names}"
+                )
+        self._params_input_name = name
+
     def _check_inference(self, inference: Pipeline) -> None:
         nb_outputs = len(inference.outputs())
         outputs_txt = "\n - ".join(inference.outputs())
@@ -146,7 +165,7 @@ def _check_consistency(self) -> None:
 
         free_inputs_set = (
             self.inference.inputs()
-            - {self.input_name}
+            - {self.input_name, self.params_input_name}
             - self.all_outputs()
             - self.inputs()
             - inference_parameters  # it is allowed to pass parameters: they will be automatically persisted by the hook
@@ -160,7 +179,7 @@ def _check_consistency(self) -> None:
                 " \nNo free input is allowed."
                 " Please make sure that 'inference.inputs()' are all"
                 " in 'training.all_outputs() + training.inputs()'"
-                "except 'input_name' and parameters which starts with 'params:'."
+                "except 'input_name', 'params_input_name' and parameters which starts with 'params:'."
             )
 
     def _turn_pipeline_to_ml(self, pipeline: Pipeline):
@@ -170,6 +189,7 @@ def _turn_pipeline_to_ml(self, pipeline: Pipeline):
             input_name=self.input_name,
             kpm_kwargs=self.kpm_kwargs,
             log_model_kwargs=self.log_model_kwargs,
+            params_input_name=self.params_input_name,
         )
 
     def only_nodes(self, *node_names: str) -> "Pipeline":  # pragma: no cover
@@ -225,13 +245,13 @@ def tag(self, tags: Union[str, Iterable[str]]) -> "PipelineML":
 
     def filter(
         self,
-        tags: Iterable[str] = None,
-        from_nodes: Iterable[str] = None,
-        to_nodes: Iterable[str] = None,
-        node_names: Iterable[str] = None,
-        from_inputs: Iterable[str] = None,
-        to_outputs: Iterable[str] = None,
-        node_namespace: str = None,
+        tags: Optional[Iterable[str]] = None,
+        from_nodes: Optional[Iterable[str]] = None,
+        to_nodes: Optional[Iterable[str]] = None,
+        node_names: Optional[Iterable[str]] = None,
+        from_inputs: Optional[Iterable[str]] = None,
+        to_outputs: Optional[Iterable[str]] = None,
+        node_namespace: Optional[str] = None,
     ) -> "Pipeline":
         # see from_inputs for an explanation of why we don't call super()
         pipeline = self.training.filter(

kedro_mlflow/pipeline/pipeline_ml_factory.py

@@ -1,14 +1,16 @@
 from kedro.pipeline import Pipeline
 
 from kedro_mlflow.pipeline.pipeline_ml import PipelineML
+from typing import Optional
 
 
 def pipeline_ml_factory(
     training: Pipeline,
     inference: Pipeline,
-    input_name: str = None,
+    input_name: str,
     kpm_kwargs=None,
     log_model_kwargs=None,
+    params_input_name: Optional[str] = None,
 ) -> PipelineML:
     """This function is a helper to create `PipelineML`
     object directly from two Kedro `Pipelines` (one of
@@ -23,9 +25,9 @@ def pipeline_ml_factory(
             stored in mlflow and use the output(s)
             of the training pipeline (namely, the model)
             to predict the outcome.
-        input_name (str, optional): The name of the dataset in
+        input_name (str): The name of the dataset in
             the catalog.yml which the model's user must provide
-            for prediction (i.e. the data). Defaults to None.
+            for prediction (i.e. the data).
         kpm_kwargs:
             extra arguments to be passed to `KedroPipelineModel`
             when the PipelineML object is automatically saved at the end of a run.
@@ -37,6 +39,7 @@ def pipeline_ml_factory(
             extra arguments to be passed to `mlflow.pyfunc.log_model`
             when the PipelineML object is automatically saved at the end of a run.
             See mlflow documentation to see all available options: https://www.mlflow.org/docs/latest/python_api/mlflow.pyfunc.html#mlflow.pyfunc.log_model
+        params_input_name (str, optional): TODO
 
     Returns:
         PipelineML: A `PipelineML` which is automatically
@@ -51,5 +54,6 @@ def pipeline_ml_factory(
         input_name=input_name,
         kpm_kwargs=kpm_kwargs,
         log_model_kwargs=log_model_kwargs,
+        params_input_name=params_input_name,
     )
     return pipeline