import matplotlib
matplotlib.use('GTK')
from matplotlib.matlab import *
from matplotlib.backends.backend_gtk import ShowOn
ShowOn().set(1) # turning on interactive mode
t = arange(0.0, 3.0, 0.01)
for i in range(1,10):
figure(1)
s = sin(2*pi*i*t)
plot(t,s)
#savefig('plot%02d' % i)
close(1)