UPDATE:
I get this message no matter what I attempt to plot: even this
plt.plot([1,2,3,4])
plt.ylabel('some numbers')
plt.show()
returns the error RuntimeError: Could not create write struct
I am trying to plot a raw image inline. My Jupyter notebook is up on an AWS instance with port forwarding.
My code is as follows:
see above update
When I try this, I get the error message below, which culminates in the message RuntimeError: Could not create write struct.
The weird thing is, the exact same code runs fine locally. I can view images all day long.
So as an experiment I pulled the image down off AWS and ran it locally and I could see it displayed just fine.
I'm thinking, there must be some problem with either my Matplotlib or even jupyter notebook.
I've removed / reinstalled both multiple times, in multiple configurations. I made sure the local and AMI versions of the packages are the exact same.
I have no idea what is going on.
The error itself, naturally, isn't useful. And when googling the error, there's few exact string matching results, which is always scary.
Other random stuff:
I'm using Python 2.7
Both libraries are managed within Conda
Jupyter: 4.4.0
Matplotlib: 2.1.2
<matplotlib.image.AxesImage at 0x7f261c1f2b50>
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
/home/ubuntu/anaconda3/envs/pytorch_p27/lib/python2.7/site-packages/IPython/core/formatters.pyc in __call__(self, obj)
332 pass
333 else:
--> 334 return printer(obj)
335 # Finally look for special method names
336 method = get_real_method(obj, self.print_method)
/home/ubuntu/anaconda3/envs/pytorch_p27/lib/python2.7/site-packages/IPython/core/pylabtools.pyc in <lambda>(fig)
238
239 if 'png' in formats:
--> 240 png_formatter.for_type(Figure, lambda fig: print_figure(fig, 'png', **kwargs))
241 if 'retina' in formats or 'png2x' in formats:
242 png_formatter.for_type(Figure, lambda fig: retina_figure(fig, **kwargs))
/home/ubuntu/anaconda3/envs/pytorch_p27/lib/python2.7/site-packages/IPython/core/pylabtools.pyc in print_figure(fig, fmt, bbox_inches, **kwargs)
122
123 bytes_io = BytesIO()
--> 124 fig.canvas.print_figure(bytes_io, **kw)
125 data = bytes_io.getvalue()
126 if fmt == 'svg':
/home/ubuntu/anaconda3/envs/pytorch_p27/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
2214 orientation=orientation,
2215 dryrun=True,
-> 2216 **kwargs)
2217 renderer = self.figure._cachedRenderer
2218 bbox_inches = self.figure.get_tightbbox(renderer)
/home/ubuntu/anaconda3/envs/pytorch_p27/lib/python2.7/site-packages/matplotlib/backends/backend_agg.pyc in print_png(self, filename_or_obj, *args, **kwargs)
524 try:
525 _png.write_png(renderer._renderer, filename_or_obj,
--> 526 self.figure.dpi, metadata=metadata)
527 finally:
528 if close:
RuntimeError: Could not create write struct
<matplotlib.figure.Figure at 0x7f2624b94950>
