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Filesystem operations on Azure Data Lake Storage Gen1 using Python

  • Artikkeli

In this article, you learn how to use Python SDK to perform filesystem operations on Azure Data Lake Storage Gen1. For instructions on how to perform account management operations on Data Lake Storage Gen1 using Python, see Account management operations on Data Lake Storage Gen1 using Python.

Prerequisites

Install the modules

To work with Data Lake Storage Gen1 using Python, you need to install three modules.

  • The azure-mgmt-resource module, which includes Azure modules for Active Directory, etc.
  • The azure-mgmt-datalake-store module, which includes the Azure Data Lake Storage Gen1 account management operations. For more information on this module, see the azure-mgmt-datalake-store module reference.
  • The azure-datalake-store module, which includes the Azure Data Lake Storage Gen1 filesystem operations. For more information on this module, see the azure-datalake-store file-system module reference.

Use the following commands to install the modules.

pip install azure-mgmt-resource
pip install azure-mgmt-datalake-store
pip install azure-datalake-store

Create a new Python application

  1. In the IDE of your choice create a new Python application, for example, mysample.py.

  2. Add the following lines to import the required modules

    ## Use this only for Azure AD service-to-service authentication
from azure.common.credentials import ServicePrincipalCredentials

## Use this only for Azure AD end-user authentication
from azure.common.credentials import UserPassCredentials

## Use this only for Azure AD multi-factor authentication
from msrestazure.azure_active_directory import AADTokenCredentials

## Required for Azure Data Lake Storage Gen1 account management
from azure.mgmt.datalake.store import DataLakeStoreAccountManagementClient
from azure.mgmt.datalake.store.models import DataLakeStoreAccount

## Required for Azure Data Lake Storage Gen1 filesystem management
from azure.datalake.store import core, lib, multithread

## Common Azure imports
from azure.mgmt.resource.resources import ResourceManagementClient
from azure.mgmt.resource.resources.models import ResourceGroup

## Use these as needed for your application
import logging, getpass, pprint, uuid, time

  3. Save changes to mysample.py.

Authentication

In this section, we talk about the different ways to authenticate with Microsoft Entra ID. The options available are:

Create filesystem client

The following snippet first creates the Data Lake Storage Gen1 account client. It uses the client object to create a Data Lake Storage Gen1 account. Finally, the snippet creates a filesystem client object.

## Declare variables
subscriptionId = 'FILL-IN-HERE'
adlsAccountName = 'FILL-IN-HERE'

## Create a filesystem client object
adlsFileSystemClient = core.AzureDLFileSystem(adlCreds, store_name=adlsAccountName)

Create a directory

## Create a directory
adlsFileSystemClient.mkdir('/mysampledirectory')

Upload a file

## Upload a file
multithread.ADLUploader(adlsFileSystemClient, lpath='C:\\data\\mysamplefile.txt', rpath='/mysampledirectory/mysamplefile.txt', nthreads=64, overwrite=True, buffersize=4194304, blocksize=4194304)

Download a file

## Download a file
multithread.ADLDownloader(adlsFileSystemClient, lpath='C:\\data\\mysamplefile.txt.out', rpath='/mysampledirectory/mysamplefile.txt', nthreads=64, overwrite=True, buffersize=4194304, blocksize=4194304)

Delete a directory

## Delete a directory
adlsFileSystemClient.rm('/mysampledirectory', recursive=True)

Next steps

See also