[Matplotlib-users] removing a colorbar

[<fcc...@fi...>]

hi,

how can I remove a colorbar?

in the following code, i generate figures that are saved not shown. and with 
every new figure I get an extra colorbar instead of an updated one!

from matplotlib.pylab import *
from RandomArray import *


imshow(normal(0,1,(256,256)))
title('distance matrix')
colorbar()
savefig('dm.png')
imshow(normal(0,1,(256,256))+20)
title('conectivity matrix')
colorbar()
savefig('cm.png')

there should be a way to toggle a color bar on and off.

Flávio