Setting the {python} environment

1. {python} requirements

Table 1. List of modules to compile Feel++ {python} bindings

Module

Version

mpi4py

3.0

sympy

1.1

2. Using virtualenv for development

To develop Feel++ applications in {python}, it is strongly suggested that you create a protected {python} environment using e.g. virtualenv.

Virtualenv is a tool used to create an isolated {python} environment. The environment has its own installation directories, the libraries are not shared with other virtualenv environments. It doesn’t access the globally installed libraries either.

virtualenv allows to create a custom user-based environment where experiments can be easily done during the development process.

The steps are as follows:

  • install virtualenv

    pip3 install virtualenv

    and check the full path of the environment

which virtualenv

  • create a virtual environment using python3

    > which python3
/usr/bin/python3
> mkdir pyfeelpp-env
> virtualenv ~/pyfeelpp-env -p /usr/bin/python3

    The last command creates a local copy of your environment. While working on this {pyfeelpp}, you should activate the local environment in order to make sure you’re working with the right versions of your tools and packages.

  • activate the environment

    > cd pyfeelpp-env
> . bin/activate

  • configure Feel++ using cmake or configure with the environment activated so that the make install procedure installs {pyfeelpp}, {pyfeelpptb} and {pyfeelppmor} in the virtual environment where you can test it safely.