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I create the polar plot example fromhttp://matplotlib.org/examples/pie_and_polar_charts/polar_scatter_demo.html
Then
fig = plt.gcf()pf = pickle.dumps(fig)f2 = pickle.loads(pf)throws the following exception:
/home/joerg/applications/anaconda3/lib/python3.4/site-packages/matplotlib/transforms.py in __setstate__(self, data_dict) 116 self.__dict__ = data_dict 117 # turn the normal dictionary back into a WeakValueDictionary--> 118 self._parents = WeakValueDictionary(self._parents) 119 120 def __copy__(self, *args):AttributeError: 'PolarAffine' object has no attribute '_parents'Note that this is separate from issue#3483 in thatplt.ioff() before unpickling does not work.