I have an application where the user can edit line colors and other attributes 
after the plot is drawn.  The artists update just fine but the legend doesn't 
change.

>From what I can see in the legend code, it doesn't seem like there is any 
>mechanism in place for doing this.  Does anyone have any ideas on the best way 
>to implement something like this?

Here is a simplified script to show the issue:

import pylab as p
p.ion()
l = p.plot( [1,2,3], 'b', label="foo" )
p.legend()

raw_input( "press return..." )
l[0].set_color( "green" )
p.draw()

Thanks,
Ted
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