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import sys import matplotlib import matplotlib.pyplot as plt print matplotlib.__version__, matplotlib.get_backend() def hit(event): sys.stderr.write('hit\n') fig = plt.figure() cid0 = fig.canvas.mpl_connect('key_press_event', hit) cid1 = fig.canvas.mpl_connect('button_press_event', hit) print cid0, cid1 plt.show() With the code above, why can't I have both mouse press event and key press events firing hit? It seems in the order above only the key press events work, whereas if I swap the lines 10 and 11 around (order cid0 and cid1 assignment), then only the mouse events work. I.e. whichever one I connected first hogs the event handler. Is this a built in limitation of matplotlib, or am I trying to connect multiple events in the wrong way? edit with some extra info : My matplotlib.__version__ is 1.1.0 . I have tried with GTKAgg and TkAgg backends with the same result. Using python and ipython, with or without -wthread -pylab , ipython qtconsole --pylab=inline , does not make a difference. The connection ids I get are cid0 == cid1 == 6 . edit 2 : My problem still remains today with matplotlib version 1.2.x and TkAgg backend, sys.version 2.7.2+ (default, Oct 4 2011, 20:06:09) [GCC 4.6.1]

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