OpenFisca Aotearoa

Writing the Legislation

Aotearoa New Zealand's legislation as code utilising Open Fisca. Early development phase. Please also read the wiki as a way of introduction.

The files that are outside from the openfisca_aotearoa folder are used to set up the development environment.

Deploy to your own platform-as-a-service

Install Instructions for Users and Contributors

This package requires Python 3 and pip .

Supported platforms:

• GNU/Linux distributions (in particular Debian and Ubuntu);
• Mac OS X;
• Microsoft Windows (we recommend using ConEmu instead of the default console).

Other OS should work if they can execute Python and NumPy.

Setup Python - Use either pyenv(new) or pew

Using pyenv

Install pyenv

curl https://pyenv.run | bash

Install python

pyenv install 3.7.2

If ModuleNotFoundError: No module named '_ctypes'

sudo apt-get update
sudo apt-get install libffi-dev

More problems? Try the instructions here

OR Using Pew

Setting-up a Virtual Environment with Pew

We recommend using a virtual environment (abbreviated as "virtualenv") with a virtualenv manager such as pew.

• A virtualenv is a project specific environment >created to suit the needs of the project you are working on.
• A virtualenv manager, such as pew, lets you easily create, remove and toggle between several virtualenvs.

To install pew, launch a terminal on your computer and follow these instructions:

python --version # You should have python 3.7 or better installed on your computer.
# If not, visit http://www.python.org to install it and install pip as well.

pip install --upgrade pip
pip install pew  # if asked, answer "Y" to the question about modifying your shell config file.

To set-up and create a new a virtualenv named openfisca running python3.7:

pew new openfisca --python=python3.7

The virtualenv you just created will be automatically activated. This means you will operate in the virtualenv immediately. You should see a prompt resembling this:

Installing setuptools, pip, wheel...done.
Launching subshell in virtual environment. Type 'exit' or 'Ctrl+D' to return.

Additional information:

• Exit the virtualenv with exit (or Ctrl-D).
• Re-enter with pew workon openfisca.

🎉 You are now ready to install this OpenFisca Country Package!

We offer 2 install procedures. Pick procedure A or B below depending on how you plan to use this Country Package.

A. Minimal Installation (Pip Install)

Follow this installation if you wish to:

• run calculations on a large population;
• create tax & benefits simulations;
• write an extension to this legislation (e.g. city specific tax & benefits);
• serve your Country Package with the OpenFisca Web API.

For more advanced uses, head to the Advanced Installation.

Install this Country Package with Pip Install

Inside your virtualenv, check the prerequisites:

python --version  # should print "Python 3.xx".
#if not, make sure you pass the python version as an argument when creating your virtualenv

pip --version  # should print at least 9.0.
#if not, run "pip install --upgrade pip"

Install the Country Package:

pip install openfisca_aotearoa

🎉 This OpenFisca Country Package is now installed and ready!

Next Steps

• To learn how to use OpenFisca, follow our tutorials.
• To serve this Country Package, serve the OpenFisca web API.

Depending on what you want to do with OpenFisca, you may want to install yet other packages in your virtualenv:

• To install extensions or write on top of this Country Package, head to the Extensions documentation.
• To plot simulation results, try matplotlib.
• To manage data, check out pandas.

B. Advanced Installation (Git Clone)

Follow this tutorial if you wish to:

• create or change this Country Package's legislation;
• contribute to the source code.

Clone OpenFisca Aotearoa with Git

First of all, make sure Git is installed on your machine.

Set your working directory to the location where you want OpenFisca Aotearoa cloned.

Inside your virtualenv, check the prerequisites:

python --version  # should print "Python 3.xx".
#if not, make sure you pass the python version as an argument when creating your virtualenv

pip --version  # should print at least 9.0.
#if not, run "pip install --upgrade pip"

Clone OpenFisca Aotearoa on your machine:

git clone https://github.com/ServiceInnovationLab/openfisca-aotearoa.git
cd openfisca-aotearoa
pip install -e .

You can make sure that everything is working by running the provided tests:

pip install -e ".[test]"
make test

Learn more about tests

🎉 This OpenFisca Aotearoa Package is now installed and ready!

Next Steps

• To write new legislation, read the wiki along with the OpenFisca Coding the legislation section.
• To contribute to the code, read our contribution doc.

Serve OpenFisca Aotearoa with the OpenFisca Web API

If you are considering building a web application, you can use the packaged OpenFisca Web API.

To serve the Openfisca Web API locally, run:

openfisca serve --port 5000

To read more about the openfisca serve command, check out its documentation.

You can make sure that your instance of the API is working by requesting:

curl "http://localhost:5000/spec"

This endpoint returns the Open API specification of your API.

🎉 OpenFisca Aotearoa is now served by the OpenFisca Web API! To learn more, go to the OpenFisca Web API documentation

Ongoing setup updates.

If you update openfisca-aotearoa after some time of having it installed you may need to update the underlying dependant libraries.

In particular to update the underlying openfisca-core library if the openfisca-aotearoa dependancies have updated, run:

pip install OpenFisca-Core --upgrade --upgrade-strategy only-if-needed

🎉 You should now be up to date again and able to continue development.