tmp.py

#!/usr/bin/env python


import matplotlib
matplotlib.use("TkAgg")
import pylab
import time

pylab.figure(figsize = (4,3))
pylab.ion()
x = pylab.arange(0, pylab.pi * 4, .1)
ax = pylab.gca()

for i in range(80):
    pylab.ylim(-2, 2)
    pylab.plot(x, pylab.sin(x + pylab.pi / 10. * i) + pylab.sin(x + pylab.pi / 20. * i))
    pylab.draw()
    #time.sleep(.2)
    pylab.savefig("{0:02d}.png".format(i))
    ax.clear()