Update An Artiste (Line2D) On A Figure Without Re-drawing The Whole Figure - Axes.draw_artist() Crashes

I want a line (Line2D) object to move with the current cursor position on several axes of a figure. The way I'm doing it now is to re-draw the whole figure each time the cursor mov

Solution 1:

so the only solution I found is to give up anaconda and re-install everything with macports and with the backend qt4.

sudo port install py27-matplotlib +qt4