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Connector Development Kit (Python)

The Airbyte Python CDK is a framework for rapidly developing production-grade Airbyte connectors. The CDK currently offers helpers specific for creating Airbyte source connectors for:

  • HTTP APIs (REST APIs, GraphQL, etc..)
  • Singer Taps
  • Generic Python sources (anything not covered by the above)

The CDK provides an improved developer experience by providing basic implementation structure and abstracting away low-level glue boilerplate.

This document is a general introduction to the CDK. Readers should have basic familiarity with the Airbyte Specification before proceeding.

If you have any issues with troubleshooting or want to learn more about the CDK from the Airbyte team, head to the #connector-development channel in our Slack to inquire further!

Getting Started

Generate an empty connector using the code generator. First clone the Airbyte repository then from the repository root run

cd airbyte-integrations/connector-templates/generator
./generate.sh

then follow the interactive prompt. Next, find all TODOs in the generated project directory -- they're accompanied by lots of comments explaining what you'll need to do in order to implement your connector. Upon completing all TODOs properly, you should have a functioning connector.

Additionally, you can follow this tutorial for a complete walkthrough of creating an HTTP connector using the Airbyte CDK.

Concepts & Documentation

Basic Concepts

If you want to learn more about the classes required to implement an Airbyte Source, head to our basic concepts doc.

Full Refresh Streams

If you have questions or are running into issues creating your first full refresh stream, head over to our full refresh stream doc. If you have questions about implementing a path or parse_response function, this doc is for you.

Incremental Streams

Having trouble figuring out how to write a stream_slices function or aren't sure what a cursor_field is? Head to our incremental stream doc.

Practical Tips

Airbyte recommends using the CDK template generator to develop with the CDK. The template generates created all the required scaffolding, with convenient TODOs, allowing developers to truly focus on implementing the API.

For tips on useful Python knowledge, see the Python Concepts page.

You can find a complete tutorial for implementing an HTTP source connector in this tutorial

Example Connectors

HTTP Connectors:

Singer connectors:

Simple Python connectors using the barebones Source abstraction:

Contributing

First time setup

We assume python points to python >=3.7.

Setup a virtual env:

python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]" # [dev] installs development-only dependencies

Iteration

  • Iterate on the code locally
  • Run tests via pytest -s unit_tests
  • Perform static type checks using mypy airbyte_cdk. MyPy configuration is in .mypy.ini.
  • The type_check_and_test.sh script bundles both type checking and testing in one convenient command. Feel free to use it!

Testing

All tests are located in the unit_tests directory. Run pytest --cov=airbyte_cdk unit_tests/ to run them. This also presents a test coverage report.

Publishing a new version to PyPi

  1. Bump the package version in setup.py
  2. Open a PR
  3. An Airbyte member must comment /publish-cdk dry-run=true to publish the package to test.pypi.org or /publish-cdk dry-run=false to publish it to the real index of pypi.org.

Coming Soon

  • Full OAuth 2.0 support (including refresh token issuing flow via UI or CLI)
  • Airbyte Java HTTP CDK
  • CDK for Async HTTP endpoints (request-poll-wait style endpoints)
  • CDK for other protocols
  • Don't see a feature you need? Create an issue and let us know how we can help!