DataPath Class

Represents a path to data in a datastore.

The path represented by DataPath object can point to a directory or a data artifact (blob, file). DataPath is used in combination with the DataPathComputeBinding class, which defines how the data is consumed during pipeline step execution. A DataPath can be modified at during pipeline submission with the PipelineParameter.

Initialize DataPath.

Inheritance

builtins.object

DataPath

Constructor

DataPath(datastore=None, path_on_datastore=None, name=None)

Parameters

Name	Description
datastore	Union[AbstractAzureStorageDatastore, AzureDataLakeDatastore] [Required] The Datastore to reference. Default value: None
path_on_datastore	str The relative path in the backing storage for the data reference. Default value: None
name	str, <xref:optional> An optional name for the DataPath. Default value: None
datastore Required	Union[AbstractAzureStorageDatastore, AzureDataLakeDatastore] [Required] The Datastore to reference.
path_on_datastore Required	str The relative path in the backing storage for the data reference.
name Required	str, <xref:optional> An optional name for the DataPath.

Remarks

The following example shows how to work create a DataPath and pass in arguments to it using PipelineParameter.

   def_blob_store = ws.get_default_datastore()
   print("Default datastore's name: {}".format(def_blob_store.name))

   data_path = DataPath(datastore=def_blob_store, path_on_datastore='sample_datapath1')
   datapath1_pipeline_param = PipelineParameter(name="input_datapath", default_value=data_path)
   datapath_input = (datapath1_pipeline_param, DataPathComputeBinding(mode='mount'))

   string_pipeline_param = PipelineParameter(name="input_string", default_value='sample_string1')

Full sample is available from https://github.com/Azure/MachineLearningNotebooks/blob/master/how-to-use-azureml/machine-learning-pipelines/intro-to-pipelines/aml-pipelines-showcasing-datapath-and-pipelineparameter.ipynb

Methods

create_data_reference	Create a DataReference object using this DataPath and the given DataPathComputeBinding.
create_from_data_reference	Create a DataPath from a DataReference.

create_data_reference

Create a DataReference object using this DataPath and the given DataPathComputeBinding.

create_data_reference(data_reference_name=None, datapath_compute_binding=None)

Parameters

Name	Description
data_reference_name	str The name for the data reference to create. Default value: None
datapath_compute_binding	DataPathComputeBinding [Required] The data path compute binding to use to create the data reference. Default value: None

Returns

Type	Description
DataReference	A DataReference object.

create_from_data_reference

Create a DataPath from a DataReference.

static create_from_data_reference(data_reference)

Parameters

Name	Description
data_reference Required	DataReference [Required] The data reference to use to create data path.

Returns

Type	Description
DataPath	A DataPath object.

Attributes

datastore_name

Get the name of the datastore.

Returns

Type	Description
string	The name.

path_on_datastore

Get the path on datastore.

Returns

Type	Description
string	The path.