Pass meta to containerop and pipeline

sdk/python/kfp/compiler/compiler.py

@@ -516,7 +516,7 @@ def _compile(self, pipeline_func):
     if pipeline_func not in registered_pipeline_functions:
       raise ValueError('Please use a function with @dsl.pipeline decorator.')
 
-    pipeline_name, _ = dsl.Pipeline.get_pipeline_functions()[pipeline_func]
+    pipeline_name = dsl.Pipeline.get_pipeline_functions()[pipeline_func].name
     pipeline_name = K8sHelper.sanitize_k8s_name(pipeline_name)
 
     # Create the arg list with no default values and call pipeline function.

sdk/python/kfp/components/_dsl_bridge.py

@@ -16,7 +16,7 @@
 from typing import Mapping
 from ._structures import ConcatPlaceholder, IfPlaceholder, InputValuePlaceholder, InputPathPlaceholder, IsPresentPlaceholder, OutputPathPlaceholder, TaskSpec
 from ._components import _generate_output_file_name, _default_component_name
-
+from kfp.dsl._metadata import ComponentMeta, ParameterMeta, TypeMeta, _annotation_to_typemeta
 
 def create_container_op_from_task(task_spec: TaskSpec):
     argument_values = task_spec.arguments
@@ -125,12 +125,13 @@ def expand_argument_list(argument_list):
         arguments=expanded_args,
         output_paths=output_paths,
         env=container_spec.env,
+        component_spec=component_spec,
     )
 
 
 _dummy_pipeline=None
 
-def _create_container_op_from_resolved_task(name:str, container_image:str, command=None, arguments=None, output_paths=None, env : Mapping[str, str]=None):
+def _create_container_op_from_resolved_task(name:str, container_image:str, command=None, arguments=None, output_paths=None, env : Mapping[str, str]=None, component_spec=None):
     from .. import dsl
     global _dummy_pipeline
     need_dummy = dsl.Pipeline._default_pipeline is None
@@ -150,6 +151,16 @@ def _create_container_op_from_resolved_task(name:str, container_image:str, comma
 
     output_paths_for_container_op = {output_name_to_kubernetes[name]: path for name, path in output_paths.items()}
 
+    # Construct the ComponentMeta
+    component_meta = ComponentMeta(name=component_spec.name, description=component_spec.description)
+    # Inputs
+    if component_spec.inputs is not None:
+        for input in component_spec.inputs:
+            component_meta.inputs.append(ParameterMeta(name=input.name, description=input.description, param_type=_annotation_to_typemeta(input.type), default=input.default))
+    if component_spec.outputs is not None:
+        for output in component_spec.outputs:
+            component_meta.outputs.append(ParameterMeta(name=output.name, description=output.description, param_type=_annotation_to_typemeta(output.type)))
+
     task = dsl.ContainerOp(
         name=name,
         image=container_image,
@@ -162,6 +173,8 @@ def _create_container_op_from_resolved_task(name:str, container_image:str, comma
         for name, value in env.items():
             task.add_env_variable(k8s_client.V1EnvVar(name=name, value=value))
 
+    task._set_metadata(component_meta)
+
     if need_dummy:
         _dummy_pipeline.__exit__()
 

sdk/python/kfp/dsl/_component.py

@@ -60,6 +60,8 @@ def component(func):
   def foobar(model: TFModel(), step: MLStep()):
     return dsl.ContainerOp()
   """
+  from functools import wraps
+  @wraps(func)
   def _component(*args, **kargs):
     import inspect
     fullargspec = inspect.getfullargspec(func)
@@ -76,7 +78,7 @@ def _component(*args, **kargs):
     # Inputs
     for arg in fullargspec.args:
       arg_type = TypeMeta()
-      arg_default = arg_defaults[arg] if arg in arg_defaults else ''
+      arg_default = arg_defaults[arg] if arg in arg_defaults else None
       if arg in annotations:
         arg_type = _annotation_to_typemeta(annotations[arg])
       component_meta.inputs.append(ParameterMeta(name=arg, description='', param_type=arg_type, default=arg_default))
@@ -90,9 +92,8 @@ def _component(*args, **kargs):
     #  https://github.com/rr-/docstring_parser
     #  https://github.com/terrencepreilly/darglint/blob/master/darglint/parse.py
 
-    print(component_meta.serialize())
-    #TODO: parse the metadata to the ContainerOp.
     container_op = func(*args, **kargs)
+    container_op._set_metadata(component_meta)
     return container_op
 
-  return _component
+  return _component

sdk/python/kfp/dsl/_container_op.py

@@ -16,6 +16,7 @@
 from . import _pipeline
 from . import _pipeline_param
 from ._pipeline_param import _extract_pipelineparams
+from ._metadata import ComponentMeta
 import re
 from typing import Dict
 
@@ -63,6 +64,7 @@ def __init__(self, name: str, image: str, command: str=None, arguments: str=None
     self.pod_annotations = {}
     self.pod_labels = {}
     self.num_retries = 0
+    self._metadata = None
 
     self.argument_inputs = _extract_pipelineparams([str(arg) for arg in (command or []) + (arguments or [])])
 
@@ -295,3 +297,12 @@ def set_retry(self, num_retries: int):
 
   def __repr__(self):
       return str({self.__class__.__name__: self.__dict__})
+
+  def _set_metadata(self, metadata):
+    '''_set_metadata passes the containerop the metadata information
+    Args:
+      metadata (ComponentMeta): component metadata
+    '''
+    if not isinstance(metadata, ComponentMeta):
+      raise ValueError('_set_medata is expecting ComponentMeta.')
+    self._metadata = metadata

sdk/python/kfp/dsl/_metadata.py

@@ -14,7 +14,7 @@
 
 from typing import Dict, List
 from abc import ABCMeta, abstractmethod
-from ._types import BaseType, _check_valid_type_dict, _str_to_dict, _instance_to_dict
+from ._types import BaseType, _check_valid_type_dict, _instance_to_dict
 
 class BaseMeta(object):
   __metaclass__ = ABCMeta
@@ -39,23 +39,29 @@ def __init__(self,
     self.name = name
     self.properties = {} if properties is None else properties
 
-  def to_dict(self):
-    return {self.name: self.properties}
+  def to_dict_or_str(self):
+    if self.properties is None or len(self.properties) == 0:
+      return self.name
+    else:
+      return {self.name: self.properties}
 
   @staticmethod
-  def from_dict(json_dict):
-    if not _check_valid_type_dict(json_dict):
-      raise ValueError(json_dict + ' is not a valid type string')
+  def from_dict_or_str(json):
     type_meta = TypeMeta()
-    type_meta.name, type_meta.properties = list(json_dict.items())[0]
+    if isinstance(json, Dict):
+      if not _check_valid_type_dict(json):
+        raise ValueError(json + ' is not a valid type string')
+      type_meta.name, type_meta.properties = list(json.items())[0]
+    elif isinstance(json, str):
+      type_meta.name = json
     return type_meta
 
 class ParameterMeta(BaseMeta):
   def __init__(self,
-      name: str = '',
+      name: str,
       description: str = '',
       param_type: TypeMeta = None,
-      default = ''):
+      default = None):
     self.name = name
     self.description = description
     self.param_type = TypeMeta() if param_type is None else param_type
@@ -64,13 +70,13 @@ def __init__(self,
   def to_dict(self):
     return {'name': self.name,
             'description': self.description,
-            'type': self.param_type.to_dict(),
+            'type': self.param_type.to_dict_or_str(),
             'default': self.default}
 
 class ComponentMeta(BaseMeta):
   def __init__(
       self,
-      name: str = '',
+      name: str,
       description: str = '',
       inputs: List[ParameterMeta] = None,
       outputs: List[ParameterMeta] = None
@@ -92,7 +98,7 @@ def to_dict(self):
 class PipelineMeta(BaseMeta):
   def __init__(
       self,
-      name: str = '',
+      name: str,
       description: str = '',
       inputs: List[ParameterMeta] = None
   ):
@@ -114,13 +120,13 @@ def _annotation_to_typemeta(annotation):
     TypeMeta
     '''
   if isinstance(annotation, BaseType):
-    arg_type = TypeMeta.from_dict(_instance_to_dict(annotation))
+    arg_type = TypeMeta.from_dict_or_str(_instance_to_dict(annotation))
   elif isinstance(annotation, str):
-    arg_type = TypeMeta.from_dict(_str_to_dict(annotation))
+    arg_type = TypeMeta.from_dict_or_str(annotation)
   elif isinstance(annotation, dict):
     if not _check_valid_type_dict(annotation):
       raise ValueError('Annotation ' + str(annotation) + ' is not a valid type dictionary.')
-    arg_type = TypeMeta.from_dict(annotation)
+    arg_type = TypeMeta.from_dict_or_str(annotation)
   else:
     return TypeMeta()
   return arg_type

sdk/python/kfp/dsl/_pipeline.py

@@ -38,22 +38,27 @@ def _pipeline(func):
     args = fullargspec.args
     annotations = fullargspec.annotations
 
+    # defaults
+    arg_defaults = {}
+    if fullargspec.defaults:
+      for arg, default in zip(reversed(fullargspec.args), reversed(fullargspec.defaults)):
+        arg_defaults[arg] = default
+
     # Construct the PipelineMeta
-    pipeline_meta = PipelineMeta(name=func.__name__, description='')
+    pipeline_meta = PipelineMeta(name=name, description=description)
     # Inputs
     for arg in args:
       arg_type = TypeMeta()
+      arg_default = arg_defaults[arg] if arg in arg_defaults else None
       if arg in annotations:
         arg_type = _annotation_to_typemeta(annotations[arg])
-      pipeline_meta.inputs.append(ParameterMeta(name=arg, description='', param_type=arg_type))
+      pipeline_meta.inputs.append(ParameterMeta(name=arg, description='', param_type=arg_type, default=arg_default))
 
     #TODO: add descriptions to the metadata
     #docstring parser:
     #  https://github.com/rr-/docstring_parser
     #  https://github.com/terrencepreilly/darglint/blob/master/darglint/parse.py
-    #TODO: parse the metadata to the Pipeline.
-
-    Pipeline.add_pipeline(name, description, func)
+    Pipeline.add_pipeline(pipeline_meta, func)
     return func
 
   return _pipeline
@@ -114,9 +119,9 @@ def get_pipeline_functions():
     return Pipeline._pipeline_functions
 
   @staticmethod
-  def add_pipeline(name, description, func):
+  def add_pipeline(pipeline_meta, func):
     """Add a pipeline function (decorated with @pipeline)."""
-    Pipeline._pipeline_functions[func] = (name, description)
+    Pipeline._pipeline_functions[func] = pipeline_meta
 
   def __init__(self, name: str):
     """Create a new instance of Pipeline.
@@ -130,6 +135,7 @@ def __init__(self, name: str):
     self.groups = [_ops_group.OpsGroup('pipeline', name=name)]
     self.group_id = 0
     self.conf = PipelineConf()
+    self._metadata = None
 
   def __enter__(self):
     if Pipeline._default_pipeline:
@@ -184,4 +190,13 @@ def get_next_group_id(self):
     self.group_id += 1
     return self.group_id
 
+  def _set_metadata(self, metadata):
+    '''_set_metadata passes the containerop the metadata information
+    Args:
+      metadata (ComponentMeta): component metadata
+    '''
+    if not isinstance(metadata, PipelineMeta):
+      raise ValueError('_set_medata is expecting PipelineMeta.')
+    self._metadata = metadata
+
 

sdk/python/kfp/dsl/_types.py

@@ -103,11 +103,11 @@ def check_types(checked_type, expected_type):
 	if isinstance(checked_type, BaseType):
 		checked_type = _instance_to_dict(checked_type)
 	elif isinstance(checked_type, str):
-		checked_type = _str_to_dict(checked_type)
+		checked_type = {checked_type: {}}
 	if isinstance(expected_type, BaseType):
 		expected_type = _instance_to_dict(expected_type)
 	elif isinstance(expected_type, str):
-		expected_type = _str_to_dict(expected_type)
+		expected_type = {expected_type: {}}
 	return _check_dict_types(checked_type, expected_type)
 
 def _check_valid_type_dict(payload):
@@ -136,13 +136,6 @@ def _instance_to_dict(instance):
 	'''
 	return {type(instance).__name__: instance.__dict__}
 
-def _str_to_dict(payload):
-	import json
-	json_dict = json.loads(payload)
-	if not _check_valid_type_dict(json_dict):
-		raise ValueError(payload + ' is not a valid type string')
-	return json_dict
-
 def _check_dict_types(checked_type, expected_type):
 	'''_check_dict_types checks the type consistency.
 	Args:
@@ -163,4 +156,4 @@ def _check_dict_types(checked_type, expected_type):
 						str(checked_type[type_name][type_property]) + ' and ' +
 						str(expected_type[type_name][type_property]))
 			return False
-	return True
+	return True

sdk/python/tests/dsl/component_tests.py

@@ -14,15 +14,30 @@
 
 
 from kfp.dsl._component import component
+from kfp.dsl._metadata import ComponentMeta, ParameterMeta, TypeMeta
 from kfp.dsl._types import GCSPath, Integer
 import unittest
-
-@component
-def componentA(a: {'Schema': {'file_type': 'csv'}}, b: '{"number": {"step": "large"}}' = 12, c: GCSPath(path_type='file', file_type='tsv') = 'gs://hello/world') -> {'model': Integer()}:
-  return 7
+import mock
 
 class TestPythonComponent(unittest.TestCase):
 
   def test_component(self):
     """Test component decorator."""
-    componentA(1,2,3)
+
+    class MockContainerOp:
+      def _set_metadata(self, component_meta):
+        self._metadata = component_meta
+
+    @component
+    def componentA(a: {'Schema': {'file_type': 'csv'}}, b: {'number': {'step': 'large'}} = 12, c: GCSPath(path_type='file', file_type='tsv') = 'gs://hello/world') -> {'model': Integer()}:
+      return MockContainerOp()
+
+    containerOp = componentA(1,2,3)
+
+    golden_meta = ComponentMeta(name='componentA', description='')
+    golden_meta.inputs.append(ParameterMeta(name='a', description='', param_type=TypeMeta(name='Schema', properties={'file_type': 'csv'})))
+    golden_meta.inputs.append(ParameterMeta(name='b', description='', param_type=TypeMeta(name='number', properties={'step': 'large'}), default=12))
+    golden_meta.inputs.append(ParameterMeta(name='c', description='', param_type=TypeMeta(name='GCSPath', properties={'path_type':'file', 'file_type': 'tsv'}), default='gs://hello/world'))
+    golden_meta.outputs.append(ParameterMeta(name='model', description='', param_type=TypeMeta(name='Integer')))
+
+    self.assertEqual(containerOp._metadata, golden_meta)