Quickstart: Create a data factory and pipeline using Python

Άρθρο
05/15/2024

APPLIES TO: Azure Data Factory Azure Synapse Analytics

Tip

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In this quickstart, you create a data factory by using Python. The pipeline in this data factory copies data from one folder to another folder in Azure Blob storage.

Azure Data Factory is a cloud-based data integration service that allows you to create data-driven workflows for orchestrating and automating data movement and data transformation. Using Azure Data Factory, you can create and schedule data-driven workflows, called pipelines.

Pipelines can ingest data from disparate data stores. Pipelines process or transform data by using compute services such as Azure HDInsight Hadoop, Spark, Azure Data Lake Analytics, and Azure Machine Learning. Pipelines publish output data to data stores such as Azure Synapse Analytics for business intelligence (BI) applications.

Prerequisites

An Azure account with an active subscription. Create one for free.
Python 3.6+.
An Azure Storage account.
Azure Storage Explorer (optional).
An application in Microsoft Entra ID. Create the application by following the steps in this link, using Authentication Option 2 (application secret), and assign the application to the Contributor role by following instructions in the same article. Make note of the following values as shown in the article to use in later steps: Application (client) ID, client secret value, and tenant ID.

Create and upload an input file

Launch Notepad. Copy the following text and save it as input.txt file on your disk.
```
John|Doe
Jane|Doe
```
Use tools such as Azure Storage Explorer to create the adfv2tutorial container, and input folder in the container. Then, upload the input.txt file to the input folder.

Install the Python package

Open a terminal or command prompt with administrator privileges.
First, install the Python package for Azure management resources:
```
pip install azure-mgmt-resource
```
To install the Python package for Data Factory, run the following command:
```
pip install azure-mgmt-datafactory
```
The Python SDK for Data Factory supports Python 2.7 and 3.6+.
To install the Python package for Azure Identity authentication, run the following command:
```
pip install azure-identity
```
Note

The "azure-identity" package might have conflicts with "azure-cli" on some common dependencies. If you meet any authentication issue, remove "azure-cli" and its dependencies, or use a clean machine without installing "azure-cli" package to make it work. For Sovereign clouds, you must use the appropriate cloud-specific constants. Please refer to Connect to all regions using Azure libraries for Python Multi-cloud | Microsoft Docs for instructions to connect with Python in Sovereign clouds.

Create a data factory client

Create a file named datafactory.py. Add the following statements to add references to namespaces.

from azure.identity import ClientSecretCredential 
from azure.mgmt.resource import ResourceManagementClient
from azure.mgmt.datafactory import DataFactoryManagementClient
from azure.mgmt.datafactory.models import *
from datetime import datetime, timedelta
import time

Add the following functions that print information.

def print_item(group):
    """Print an Azure object instance."""
    print("\tName: {}".format(group.name))
    print("\tId: {}".format(group.id))
    if hasattr(group, 'location'):
        print("\tLocation: {}".format(group.location))
    if hasattr(group, 'tags'):
        print("\tTags: {}".format(group.tags))
    if hasattr(group, 'properties'):
        print_properties(group.properties)

def print_properties(props):
    """Print a ResourceGroup properties instance."""
    if props and hasattr(props, 'provisioning_state') and props.provisioning_state:
        print("\tProperties:")
        print("\t\tProvisioning State: {}".format(props.provisioning_state))
    print("\n\n")

def print_activity_run_details(activity_run):
    """Print activity run details."""
    print("\n\tActivity run details\n")
    print("\tActivity run status: {}".format(activity_run.status))
    if activity_run.status == 'Succeeded':
        print("\tNumber of bytes read: {}".format(activity_run.output['dataRead']))
        print("\tNumber of bytes written: {}".format(activity_run.output['dataWritten']))
        print("\tCopy duration: {}".format(activity_run.output['copyDuration']))
    else:
        print("\tErrors: {}".format(activity_run.error['message']))

Add the following code to the Main method that creates an instance of DataFactoryManagementClient class. You use this object to create the data factory, linked service, datasets, and pipeline. You also use this object to monitor the pipeline run details. Set subscription_id variable to the ID of your Azure subscription. For a list of Azure regions in which Data Factory is currently available, select the regions that interest you on the following page, and then expand Analytics to locate Data Factory: Products available by region. The data stores (Azure Storage, Azure SQL Database, etc.) and computes (HDInsight, etc.) used by data factory can be in other regions.

def main():

    # Azure subscription ID
    subscription_id = '<subscription ID>'

    # This program creates this resource group. If it's an existing resource group, comment out the code that creates the resource group
    rg_name = '<resource group>'

    # The data factory name. It must be globally unique.
    df_name = '<factory name>'

    # Specify your Active Directory client ID, client secret, and tenant ID
    credentials = ClientSecretCredential(client_id='<Application (client) ID>', client_secret='<client secret value>', tenant_id='<tenant ID>') 

    # Specify following for Soverign Clouds, import right cloud constant and then use it to connect.
    # from msrestazure.azure_cloud import AZURE_PUBLIC_CLOUD as CLOUD
    # credentials = DefaultAzureCredential(authority=CLOUD.endpoints.active_directory, tenant_id=tenant_id)

    resource_client = ResourceManagementClient(credentials, subscription_id)
    adf_client = DataFactoryManagementClient(credentials, subscription_id)

    rg_params = {'location':'westus'}
    df_params = {'location':'westus'}

Create a data factory

Add the following code to the Main method that creates a data factory. If your resource group already exists, comment out the first create_or_update statement.

    # create the resource group
    # comment out if the resource group already exits
    resource_client.resource_groups.create_or_update(rg_name, rg_params)

    #Create a data factory
    df_resource = Factory(location='westus')
    df = adf_client.factories.create_or_update(rg_name, df_name, df_resource)
    print_item(df)
    while df.provisioning_state != 'Succeeded':
        df = adf_client.factories.get(rg_name, df_name)
        time.sleep(1)

Create a linked service

Add the following code to the Main method that creates an Azure Storage linked service.

You create linked services in a data factory to link your data stores and compute services to the data factory. In this quickstart, you only need create one Azure Storage linked service as both copy source and sink store, named "AzureStorageLinkedService" in the sample. Replace <storageaccountname> and <storageaccountkey> with name and key of your Azure Storage account.

    # Create an Azure Storage linked service
    ls_name = 'storageLinkedService001'

    # IMPORTANT: specify the name and key of your Azure Storage account.
    storage_string = SecureString(value='DefaultEndpointsProtocol=https;AccountName=<account name>;AccountKey=<account key>;EndpointSuffix=<suffix>')

    ls_azure_storage = LinkedServiceResource(properties=AzureStorageLinkedService(connection_string=storage_string)) 
    ls = adf_client.linked_services.create_or_update(rg_name, df_name, ls_name, ls_azure_storage)
    print_item(ls)

Create datasets

In this section, you create two datasets: one for the source and the other for the sink.

Create a dataset for source Azure Blob

Add the following code to the Main method that creates an Azure blob dataset. For information about properties of Azure Blob dataset, see Azure blob connector article.

You define a dataset that represents the source data in Azure Blob. This Blob dataset refers to the Azure Storage linked service you create in the previous step.

    # Create an Azure blob dataset (input)
    ds_name = 'ds_in'
    ds_ls = LinkedServiceReference(type="LinkedServiceReference",reference_name=ls_name)
    blob_path = '<container>/<folder path>'
    blob_filename = '<file name>'
    ds_azure_blob = DatasetResource(properties=AzureBlobDataset(
        linked_service_name=ds_ls, folder_path=blob_path, file_name=blob_filename)) 
    ds = adf_client.datasets.create_or_update(
        rg_name, df_name, ds_name, ds_azure_blob)
    print_item(ds)

Create a dataset for sink Azure Blob

Add the following code to the Main method that creates an Azure blob dataset. For information about properties of Azure Blob dataset, see Azure blob connector article.

You define a dataset that represents the source data in Azure Blob. This Blob dataset refers to the Azure Storage linked service you create in the previous step.

    # Create an Azure blob dataset (output)
    dsOut_name = 'ds_out'
    output_blobpath = '<container>/<folder path>'
    dsOut_azure_blob = DatasetResource(properties=AzureBlobDataset(linked_service_name=ds_ls, folder_path=output_blobpath))
    dsOut = adf_client.datasets.create_or_update(
        rg_name, df_name, dsOut_name, dsOut_azure_blob)
    print_item(dsOut)

Create a pipeline

Add the following code to the Main method that creates a pipeline with a copy activity.

    # Create a copy activity
    act_name = 'copyBlobtoBlob'
    blob_source = BlobSource()
    blob_sink = BlobSink()
    dsin_ref = DatasetReference(reference_name=ds_name)
    dsOut_ref = DatasetReference(reference_name=dsOut_name)
    copy_activity = CopyActivity(name=act_name,inputs=[dsin_ref], outputs=[dsOut_ref], source=blob_source, sink=blob_sink)

    #Create a pipeline with the copy activity
    
    #Note1: To pass parameters to the pipeline, add them to the json string params_for_pipeline shown below in the format { “ParameterName1” : “ParameterValue1” } for each of the parameters needed in the pipeline.
    #Note2: To pass parameters to a dataflow, create a pipeline parameter to hold the parameter name/value, and then consume the pipeline parameter in the dataflow parameter in the format @pipeline().parameters.parametername.
    
    p_name = 'copyPipeline'
    params_for_pipeline = {}

    p_name = 'copyPipeline'
    params_for_pipeline = {}
    p_obj = PipelineResource(activities=[copy_activity], parameters=params_for_pipeline)
    p = adf_client.pipelines.create_or_update(rg_name, df_name, p_name, p_obj)
    print_item(p)

Create a pipeline run

Add the following code to the Main method that triggers a pipeline run.

    # Create a pipeline run
    run_response = adf_client.pipelines.create_run(rg_name, df_name, p_name, parameters={})

Monitor a pipeline run

To monitor the pipeline run, add the following code the Main method:

    # Monitor the pipeline run
    time.sleep(30)
    pipeline_run = adf_client.pipeline_runs.get(
        rg_name, df_name, run_response.run_id)
    print("\n\tPipeline run status: {}".format(pipeline_run.status))
    filter_params = RunFilterParameters(
        last_updated_after=datetime.now() - timedelta(1), last_updated_before=datetime.now() + timedelta(1))
    query_response = adf_client.activity_runs.query_by_pipeline_run(
        rg_name, df_name, pipeline_run.run_id, filter_params)
    print_activity_run_details(query_response.value[0])

Now, add the following statement to invoke the main method when the program is run:

# Start the main method
main()

Full script

Here is the full Python code:

from azure.identity import ClientSecretCredential 
from azure.mgmt.resource import ResourceManagementClient
from azure.mgmt.datafactory import DataFactoryManagementClient
from azure.mgmt.datafactory.models import *
from datetime import datetime, timedelta
import time

def print_item(group):
    """Print an Azure object instance."""
    print("\tName: {}".format(group.name))
    print("\tId: {}".format(group.id))
    if hasattr(group, 'location'):
        print("\tLocation: {}".format(group.location))
    if hasattr(group, 'tags'):
        print("\tTags: {}".format(group.tags))
    if hasattr(group, 'properties'):
        print_properties(group.properties)

def print_properties(props):
    """Print a ResourceGroup properties instance."""
    if props and hasattr(props, 'provisioning_state') and props.provisioning_state:
        print("\tProperties:")
        print("\t\tProvisioning State: {}".format(props.provisioning_state))
    print("\n\n")

def print_activity_run_details(activity_run):
    """Print activity run details."""
    print("\n\tActivity run details\n")
    print("\tActivity run status: {}".format(activity_run.status))
    if activity_run.status == 'Succeeded':
        print("\tNumber of bytes read: {}".format(activity_run.output['dataRead']))
        print("\tNumber of bytes written: {}".format(activity_run.output['dataWritten']))
        print("\tCopy duration: {}".format(activity_run.output['copyDuration']))
    else:
        print("\tErrors: {}".format(activity_run.error['message']))


def main():

    # Azure subscription ID
    subscription_id = '<subscription ID>'

    # This program creates this resource group. If it's an existing resource group, comment out the code that creates the resource group
    rg_name = '<resource group>'

    # The data factory name. It must be globally unique.
    df_name = '<factory name>'

    # Specify your Active Directory client ID, client secret, and tenant ID
    credentials = ClientSecretCredential(client_id='<service principal ID>', client_secret='<service principal key>', tenant_id='<tenant ID>') 
    resource_client = ResourceManagementClient(credentials, subscription_id)
    adf_client = DataFactoryManagementClient(credentials, subscription_id)

    rg_params = {'location':'westus'}
    df_params = {'location':'westus'}
 
    # create the resource group
    # comment out if the resource group already exits
    resource_client.resource_groups.create_or_update(rg_name, rg_params)

    # Create a data factory
    df_resource = Factory(location='westus')
    df = adf_client.factories.create_or_update(rg_name, df_name, df_resource)
    print_item(df)
    while df.provisioning_state != 'Succeeded':
        df = adf_client.factories.get(rg_name, df_name)
        time.sleep(1)

    # Create an Azure Storage linked service
    ls_name = 'storageLinkedService001'

    # IMPORTANT: specify the name and key of your Azure Storage account.
    storage_string = SecureString(value='DefaultEndpointsProtocol=https;AccountName=<account name>;AccountKey=<account key>;EndpointSuffix=<suffix>')

    ls_azure_storage = LinkedServiceResource(properties=AzureStorageLinkedService(connection_string=storage_string)) 
    ls = adf_client.linked_services.create_or_update(rg_name, df_name, ls_name, ls_azure_storage)
    print_item(ls)

    # Create an Azure blob dataset (input)
    ds_name = 'ds_in'
    ds_ls = LinkedServiceReference(type="LinkedServiceReference",reference_name=ls_name)
    blob_path = '<container>/<folder path>'
    blob_filename = '<file name>'
    ds_azure_blob = DatasetResource(properties=AzureBlobDataset(
        linked_service_name=ds_ls, folder_path=blob_path, file_name=blob_filename))
    ds = adf_client.datasets.create_or_update(
        rg_name, df_name, ds_name, ds_azure_blob)
    print_item(ds)

    # Create an Azure blob dataset (output)
    dsOut_name = 'ds_out'
    output_blobpath = '<container>/<folder path>'
    dsOut_azure_blob = DatasetResource(properties=AzureBlobDataset(linked_service_name=ds_ls, folder_path=output_blobpath))
    dsOut = adf_client.datasets.create_or_update(
        rg_name, df_name, dsOut_name, dsOut_azure_blob)
    print_item(dsOut)

    # Create a copy activity
    act_name = 'copyBlobtoBlob'
    blob_source = BlobSource()
    blob_sink = BlobSink()
    dsin_ref = DatasetReference(reference_name=ds_name)
    dsOut_ref = DatasetReference(reference_name=dsOut_name)
    copy_activity = CopyActivity(name=act_name, inputs=[dsin_ref], outputs=[
                                 dsOut_ref], source=blob_source, sink=blob_sink)

    # Create a pipeline with the copy activity
    p_name = 'copyPipeline'
    params_for_pipeline = {}
    p_obj = PipelineResource(
        activities=[copy_activity], parameters=params_for_pipeline)
    p = adf_client.pipelines.create_or_update(rg_name, df_name, p_name, p_obj)
    print_item(p)

    # Create a pipeline run
    run_response = adf_client.pipelines.create_run(rg_name, df_name, p_name, parameters={})

    # Monitor the pipeline run
    time.sleep(30)
    pipeline_run = adf_client.pipeline_runs.get(
        rg_name, df_name, run_response.run_id)
    print("\n\tPipeline run status: {}".format(pipeline_run.status))
    filter_params = RunFilterParameters(
        last_updated_after=datetime.now() - timedelta(1), last_updated_before=datetime.now() + timedelta(1))
    query_response = adf_client.activity_runs.query_by_pipeline_run(
        rg_name, df_name, pipeline_run.run_id, filter_params)
    print_activity_run_details(query_response.value[0])


# Start the main method
main()

Run the code

Build and start the application, then verify the pipeline execution.

The console prints the progress of creating data factory, linked service, datasets, pipeline, and pipeline run. Wait until you see the copy activity run details with data read/written size. Then, use tools such as Azure Storage explorer to check the blob(s) is copied to "outputBlobPath" from "inputBlobPath" as you specified in variables.

Here is the sample output:

Name: <data factory name>
Id: /subscriptions/<subscription ID>/resourceGroups/<resource group name>/providers/Microsoft.DataFactory/factories/<data factory name>
Location: eastus
Tags: {}

Name: storageLinkedService
Id: /subscriptions/<subscription ID>/resourceGroups/<resource group name>/providers/Microsoft.DataFactory/factories/<data factory name>/linkedservices/storageLinkedService

Name: ds_in
Id: /subscriptions/<subscription ID>/resourceGroups/<resource group name>/providers/Microsoft.DataFactory/factories/<data factory name>/datasets/ds_in

Name: ds_out
Id: /subscriptions/<subscription ID>/resourceGroups/<resource group name>/providers/Microsoft.DataFactory/factories/<data factory name>/datasets/ds_out

Name: copyPipeline
Id: /subscriptions/<subscription ID>/resourceGroups/<resource group name>/providers/Microsoft.DataFactory/factories/<data factory name>/pipelines/copyPipeline

Pipeline run status: Succeeded
Datetime with no tzinfo will be considered UTC.
Datetime with no tzinfo will be considered UTC.

Activity run details

Activity run status: Succeeded
Number of bytes read: 18
Number of bytes written: 18
Copy duration: 4

Clean up resources

To delete the data factory, add the following code to the program:

adf_client.factories.delete(rg_name, df_name)

The pipeline in this sample copies data from one location to another location in an Azure blob storage. Go through the tutorials to learn about using Data Factory in more scenarios.

Κοινή χρήση μέσω

Quickstart: Create a data factory and pipeline using Python

Prerequisites

Create and upload an input file

Install the Python package

Create a data factory client

Create a data factory

Create a linked service

Create datasets

Create a dataset for source Azure Blob

Create a dataset for sink Azure Blob

Create a pipeline

Create a pipeline run

Monitor a pipeline run

Full script

Run the code

Clean up resources

Σχόλια

Πρόσθετοι πόροι

Κοινή χρήση μέσω

Quickstart: Create a data factory and pipeline using Python

Prerequisites

Create and upload an input file

Install the Python package

Create a data factory client

Create a data factory

Create a linked service

Create datasets

Create a dataset for source Azure Blob

Create a dataset for sink Azure Blob

Create a pipeline

Create a pipeline run

Monitor a pipeline run

Full script

Run the code

Clean up resources

Related content

Σχόλια

Πρόσθετοι πόροι