Which Python to Use?

While Python is the same in different package distributions, out
programs use several visualization packages.

The codes in MatplotLib use the Matplotlib package for
visualizations, or in some cases no visualizations. We have run 
them with the Python distribution (both free) Enthought Canopy 
and with Anaconda 2's Spyder. RHL has them running best with 
Python 2 and Canopy (Spyder's Kernel sometimes
has to be restarted to get the figures).

The codes in Vpython use Vpython graphics. Vpython has recently
been undergoing changes and for us the codes run easiest by pasting
them into an Anaconda 2 Jupyter notebook environment. Note that
Vpython may have to be installed into Anaconda with the command
"conda install -c vpython vpython" or "pip install vpython".

The codes in VisualCodes(old) use the no-longer-supported Visual
package (which with Python was called Vpython previously). They run
with the Visual editor VIDLE. There are more of these Visual 
versions than Vpython versions since Visual has been around longer 
than Vpython.

The codes in JupyterNB are to be used in jupyter notebooks.