不能腌制或莳萝FigureCanvasQTAgg

Question

I am trying to dump a figure object into a pickle file and it keeps failing using Python 3.7.1.

#python.version = 3.7.3
#pickle.format_version = '4.0'
#dill.__version__ = '0.2.9'
print(ax, type(ax))
print(matplotlib.get_backend())
print(matplotlib.__version__)
print(sys.version_info)
with open("MyFile", "wb") as dill_file:
    dill.dump(ax, dill_file)
pt.savefig("MyFile_"+now)

The results are:

AxesSubplot(0.125,0.11;0.775x0.35) 
<class'matplotlib.axes._subplots.AxesSubplot'>
Qt5Agg
3.0.2
sys.version_info(major=3, minor=7, micro=1, releaselevel='final', serial=0)

Then the error:

> error from callback : can't pickle FigureCanvasQTAgg objects

The above code is not in a class. I have tried other backends (Agg, TkAgg, etc) with same result. I have also tried using just pickle.dump with same results.

Answer 1

You should be able to do this, according to Saving interactive Matplotlib figures

... but this is exprimental and has downsides. Consider saving to .SVG file as that answer says.