nGraph python binding

Installation

Install nGraph (Required)

Follow the [steps](http://ngraph.nervanasys.com/docs/latest/install.html) to build and install ngraph.

Clone the pybind repository

cd ngraph/python
git clone --recursive -b allow-nonconstructible-holders https://github.com/jagerman/pybind11.git

Set the environment variables

export NGRAPH_CPP_BUILD_PATH=$HOME/ngraph_dist
export LD_LIBRARY_PATH=$HOME/ngraph_dist/lib
export DYLD_LIBRARY_PATH=$HOME/ngraph_dist/lib # (Only needed on MacOS)
export PYBIND_HEADERS_PATH=pybind11

Install Wrapper (python binding)

python setup.py install

To run unit tests, first install additional required packages.

pip install -r test_requirements.txt

Then run a test.

pytest test/test_ops.py
pytest test/ngraph/

Running tests with tox

Tox is a Python virtualenv management and test command line tool. In our project it automates:

• running unit tests using pytest
• checking that code style is compliant with PEP8 using Flake8
• static type checking using MyPy
• testing across Python 2 and 3

Installing and running test with Tox:

pip install tox
tox

You can run tests using only Python 3 or 2 using the -e (environment) switch:

tox -e py36
tox -e py27

You can check styles in a particular code directory by specifying the path:

tox ngraph/

In case of problems, try to recreate the virtual environments by deleting the .tox directory:

rm -rf .tox
tox