As per python/devguide#344, Python 2 will be sunset come Jan 1st, 2020.

Additionally, a number of projects used in conjunction with OpenFisca have pledged to stop supporting Python 2 soon :

• pandas
• Matplotlib
• NumPy
• Jupyter notebook

Notably, NumPy's Python 2 maintenance mode will start come 2019.

Let's open the discussion and tackle this effort together.

To-do:

• Change CircleCI configs
  • Core uses 3.7
• Change READMEs
• Edit doc
• Shared in Slack #general (YouTube, future, ...)
• Tweeted
• Sent by email

EDIT by @fpagnoux:

Todo on January 1st:

• Remove all the from __future__, from builtins and from future imports