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sektoid0 opened this issue Jan 9, 2015 · 7 comments
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unable to pickle.load an AxesSubplot object #3986

sektoid0 opened this issue Jan 9, 2015 · 7 comments

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@sektoid0
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sektoid0 commented Jan 9, 2015

Python 2.7.9 :: Anaconda 2.1.0 (64-bit)
Matplotlib 1.4.0

On an example code from http://stackoverflow.com/questions/7290370/store-and-reload-matplotlib-pyplot-object getting a following exception on pickle load.

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-2-37de7fcd9451> in <module>()
      2 import pickle
      3 
----> 4 ax = pickle.load(file('myplot.pickle', 'rb'))
      5 plt.show()    

/home/anaconda/envs/py27/lib/python2.7/pickle.pyc in load(file)
   1376 
   1377 def load(file):
-> 1378     return Unpickler(file).load()
   1379 
   1380 def loads(str):    

/home/anaconda/envs/py27/lib/python2.7/pickle.pyc in load(self)
    856             while 1:
    857                 key = read(1)
--> 858                 dispatch[key](self)
    859         except _Stop, stopinst:
    860             return stopinst.value    

/home/anaconda/envs/py27/lib/python2.7/pickle.pyc in load_build(self)
   1215         setstate = getattr(inst, "__setstate__", None)
   1216         if setstate:
-> 1217             setstate(state)
   1218             return
   1219         slotstate = None    

/home/anaconda/envs/py27/lib/python2.7/site-packages/matplotlib/figure.pyc in __setstate__(self, state)
   1343             allnums = plt.get_fignums()
   1344             num = max(allnums) + 1 if allnums else 1
-> 1345             mgr = plt._backend_mod.new_figure_manager_given_figure(num, self)
   1346 
   1347             # XXX The following is a copy and paste from pyplot. Consider    

AttributeError: 'module' object has no attribute 'new_figure_manager_given_figure'
@pelson
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pelson commented Jan 9, 2015

Are you loading a pickle file created with the same version of matplotlib? Can you provide the code to reproduce. Thanks.

@sektoid0
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sektoid0 commented Jan 9, 2015

Yes. The same version of matplotlib. The code is exactly the one listed here:
http://stackoverflow.com/questions/7290370/store-and-reload-matplotlib-pyplot-object

@blink1073
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We can pickle that

@efiring
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efiring commented Feb 4, 2015

I can't reproduce the problem; with matplotlib 1.4.0, Anaconda 2.1.0, on OSX, if I cut and paste the code on that page as instructed, it works perfectly.

@efiring efiring closed this as completed Feb 4, 2015
@cbyrohl cbyrohl mentioned this issue Mar 14, 2017
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@prhbrt
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prhbrt commented Jan 8, 2020 •
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I solved this issue in Jupyter notebooks, not Anaconda, using

%matplotlib agg

with open('file.p3', 'rb') as f:
    model = pickle.load(f)

%matplotlib inline

That is, this is ipython code, not python code.

@QuLogic
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QuLogic commented Jan 8, 2020

This bug report doesn't involve notebooks. It's also 4 years old and closed. Your workaround may be helpful to you, but it's not really relevant here.

@prhbrt
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prhbrt commented Jan 9, 2020 •
edited
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Actually, the %matplotlib agg translates in to python code, so I could imagine it could be useful for someone doing plain python. Notebooks are just python in the end. I also don't think this is ipython vs. python related, I think it's related to the backend of matplotlib. So my suggestion was to temporarily switch backends.

Moreover, the bug was closed because it couldn't be reproduced. So anyone who googles this error and gets to this page, now at least has a lead.

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6 participants
@efiring @QuLogic @pelson @sektoid0 @blink1073 @prhbrt