<span class="k">if</span> <span class="n">prop_patches</span> <span class="ow">is</span> <span class="bp">None</span><span class="p">:</span> <span class="n">prop ...
I have a figure canvas and navigation bar embedded in a wx.Dialog. In matplotlib version 1.2.1 and earlier the zoom, home, back (and pan) all worked fine. If I upgrade to 1.3 (or 1.4.2) zoom, home, ...