Starting a Python session differs somewhat depending on your operating system.
If you are running Windows, three different Python shells are available under the JModelica.org start menu.
Python - Normal command shell started with Python.
IPython - Interactive shell for Python with, for example, code highlighting and tab completion.
pylab - IPython shell which also loads the numeric computation environment PyLab.
To start the IPython shell with PyLab on Linux or Mac OS X, open a terminal and enter the command:
> $JMODELICA_HOME/Python/jm_ipython.sh -pylab