Welcome to py-trello’s documentation!


A wrapper around the Trello API written in Python. Each Trello object is represented by a corresponding Python object. The attributes of these objects are cached, but the child objects are not. This can possibly be improved when the API allows for notification subscriptions; this would allow caching (assuming a connection was available to invalidate the cache as appropriate).

I’ve created a Trello Board for feature requests, discussion and some development tracking.


pip install py-trello


from trello import TrelloClient

client = TrelloClient(

Where token and token_secret come from the 3-legged OAuth process and api_key and api_secret are your Trello API credentials that are (generated here).

Getting your Trello OAuth Token

Make sure the following environment variables are set:


These are obtained from the link mentioned above.

TRELLO_EXPIRATION is optional. Set it to a string such as ‘never’ or ‘1day’. Trello’s default OAuth Token expiration is 30 days.

Default permissions are read/write.

More info on setting the expiration here: https://trello.com/docs/gettingstarted/#getting-a-token-from-a-user


python ./trello/util.py

Required Python modules

Found in requirements.txt


To run the tests, run python -m unittest discover. Four environment variables must be set:

  • TRELLO_API_KEY: your Trello API key
  • TRELLO_TOKEN: your Trello OAuth token
  • TRELLO_TEST_BOARD_COUNT: the number of boards in your Trello account
  • TRELLO_TEST_BOARD_NAME: name of the board to test card manipulation on. Must be unique, or the first match will be used

To run tests across various Python versions, tox is supported. Install it and simply run tox from the py-trello directory.

Indices and tables