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data load tool (dlt) โ€” the open-source Python library for data loading

Be it a Google Colab notebook, AWS Lambda function, an Airflow DAG, your local laptop,
or a GPT-4 assisted development playgroundโ€”dlt can be dropped in anywhere.

๐Ÿš€ Join our thriving community of likeminded developers and build the future together!


dlt supports Python 3.8+.

pip install dlt

Quick Start

Load chess game data from API and save it in DuckDB:

import dlt
from dlt.sources.helpers import requests
# Create a dlt pipeline that will load
# chess player data to the DuckDB destination
pipeline = dlt.pipeline(
# Grab some player data from API
data = []
for player in ['magnuscarlsen', 'rpragchess']:
    response = requests.get(f'{player}')
# Extract, normalize, and load the data, table_name='player')

Try it out in our Colab Demo


  • Automatic Schema: Data structure inspection and schema creation for the destination.
  • Data Normalization: Consistent and verified data before loading.
  • Seamless Integration: Colab, AWS Lambda, Airflow, and local environments.
  • Scalable: Adapts to growing data needs in production.
  • Easy Maintenance: Clear data pipeline structure for updates.
  • Rapid Exploration: Quickly explore and gain insights from new data sources.
  • Versatile Usage: Suitable for ad-hoc exploration to advanced loading infrastructures.
  • Start in Seconds with CLI: Powerful CLI for managing, deploying and inspecting local pipelines.
  • Incremental Loading: Load only new or changed data and avoid loading old records again.
  • Open Source: Free and Apache 2.0 Licensed.

Ready to use Sources and Destinations

Explore ready to use sources (e.g. Google Sheets) in the Verified Sources docs and supported destinations (e.g. DuckDB) in the Destinations docs.


For detailed usage and configuration, please refer to the official documentation.


You can find examples for various use cases in the examples folder.

Get Involved

The dlt project is quickly growing, and we're excited to have you join our community! Here's how you can get involved:

  • Connect with the Community: Join other dlt users and contributors on our Slack
  • Report issues and suggest features: Please use the GitHub Issues to report bugs or suggest new features. Before creating a new issue, make sure to search the tracker for possible duplicates and add a comment if you find one.
  • Track progress of our work and our plans: Please check out our public Github project
  • Contribute Verified Sources: Contribute your custom sources to the dlt-hub/verified-sources to help other folks in handling their data tasks.
  • Contribute code: Check out our contributing guidelines for information on how to make a pull request.
  • Improve documentation: Help us enhance the dlt documentation.


DLT is released under the Apache 2.0 License.