MatPlotLib
Matplotlib is our main vehicle for plotting from python. As of 9 June 2008, Gentry has version 0.91.2 of matplotlib, which is not the latest. But is the latest rpm offered by the Fedora release 8 (Werewolf).
You can grab the manual for that version here: users_guide_0.91.2svn.pdf.
On Gentry, /usr/share/doc/python-matplotlib-0.91.2/examples has example programs to run.
Also, on Gentry, if you invoke ipython -pylab, then help(pylab) displays a help system. Type q to get out of the help system. Specific commands can be investigated, for example help(plot_date).