Gnuplot.py is a Python package that interfaces to gnuplot, the popular
open-source plotting program. It allows you to use gnuplot from within
Python to plot arrays of data from memory, data files, or mathematical
functions. If you use Python to perform computations or as `glue' for
numerical programs, you can use this package to plot data on the fly
as they are computed. And the combination with Python makes it is easy
to automate things, including to create crude `animations' by plotting
different datasets one after another.