An implementation of Amazon Ion for Python.

This package is designed to work with Python 2.6+ and Python 3.3+

Start with the simpleion module, which provides four APIs (dump, dumps, load, loads) that will be familiar to users of Python's built-in JSON parsing module.

For example:

>>> import amazon.ion.simpleion as ion
>>> obj = ion.loads('{abc: 123}')
>>> obj['abc']
123
>>> ion.dumps(obj, binary=False)
'$ion_1_0 {abc:123}'

This repository contains a git submodule called ion-tests, which holds test data used by ion-python's unit tests.

The easiest way to clone the ion-python repository and initialize its ion-tests submodule is to run the following command.

$ git clone --recursive https://github.com/amzn/ion-python.git ion-python

Alternatively, the submodule may be initialized independently from the clone by running the following commands.

$ git submodule init
$ git submodule update

It is recommended to use virtualenv to create a clean environment to build/test Ion Python.

$ virtualenv venv
...
$ . venv/bin/activate
$ pip install -r requirements.txt
$ pip install -e .

You can also run the tests through setup.py or py.test directly.

$ python setup.py test

In order to verify that all platforms we support work with Ion Python, we use a combination of tox with pyenv.

Install relevant versions of Python:

$ for V in 2.6.9 2.7.15 3.3.7 3.4.8 3.5.5 3.6.5 3.7.2 pypy2.7-6.0.0 pypy3.5-6.0.0; do pyenv install $V; done

Note that on Mac OS X, you may need to change the CFLAGS:

$ for V in 2.6.9 2.7.15 3.3.7 3.4.8 3.5.5 3.6.5 3.7.2 pypy2.7-6.0.0 pypy3.5-6.0.0; do
    CFLAGS="-I$(xcrun --show-sdk-path)/usr/include" pyenv install $V; done

Once you have these installations, add them as a local pyenv configuration

$ pyenv local 2.6.9 2.7.15 3.3.7 3.4.8 3.5.5 3.6.5 3.7.2 pypy2.7-6.0.0 pypy3.5-6.0.0

At the time of this writing, on Mac OS X, you may have problems with pyenv and pypy. On this platform, it is probably easier to have pypy not managed by pyenv and install and use it directly from brew.

Assuming you have pyenv properly set up (making sure pyenv init is evaluated into your shell), you can now run tox:

# Run tox for all versions of python which executes py.test.
$ tox

# Run tox for just Python 2.7 and 3.5.
$ tox -e py27,py35

# Run tox for a specific version and run py.test with high verbosity
$ tox -e py27 -- py.test -vv

# Run tox for a specific version and just the virtual env REPL.
$ tox -e py27 -- python

The following build, deployment, or release tasks are required:

• Add support for code coverage reporting.
  • Publish coverage to something like Coverage.io
• Improve documentation around setup/development/contribution/getting started.
• Consider using something like PyPy.js to build an interactive shell for playing with Ion python and provide a client-side Ion playground.