[Matplotlib-users] Unable to display data using matplotlib

[ashwinD12 .]

Thanks for your response.

The code as shown in that URL apparently has worked and the plot has been
shown. I am not trying to modify the source code and as I understand the
code it is using matplotlib and cartopy. So the question is there some
backend matplotlib setting (such as the URL you mentioned) that needs to be
set in order to get this to work ?

My first understanding was since the error is related to  Tk and matplotlib
there is something I am not doing right such as what is described here -
http://matplotlib.org/examples/user_interfaces/embedding_in_tk2.html ?

Ashwin.

On Fri, Oct 14, 2016 at 4:21 PM, Joy merwin monteiro <joy.merwin at gmail.com>
wrote:

> The end of the error traceback says:
>
> "
>
> raise HTTPError(req.full_url, code, msg, hdrs, fp)
>   urllib.error.HTTPError: HTTP Error 404: Not Found
> "
>
> Looks like the code is trying to access an online resource that is not available.
>
> Don't think it has anything to do with matplotlib.
>
> Joy
>
>
> On Fri, Oct 14, 2016 at 11:59 AM, ashwinD12 . <winash12 at gmail.com> wrote:
>
>> Hello,
>>           I am using this example from this cookbook -
>> http://nbviewer.jupyter.org/github/unidata/notebook-gallery/
>> blob/master/notebooks/850mb_Temperature_Advection.ipynb
>>
>> and I get this exception when I run it -
>>
>> I am wondering whether I need to matplotlib.use('Tkagg') which I did add
>> but does not fix the problem.
>>
>> File "/usr/lib/python3/dist-packages/matplotlib/backends/backend_agg.py", line 474, in draw
>> self.figure.draw(self.renderer)File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line 61, in draw_wrapper
>> draw(artist, renderer, *args, **kwargs)File "/usr/lib/python3/dist-packages/matplotlib/figure.py", line 1159, in draw
>>  func(*args)
>>  File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line 61, in draw_wrapper
>>  draw(artist, renderer, *args, **kwargs)
>>  File "/usr/local/lib/python3.5/dist-packages/cartopy/mpl/geoaxes.py", line 355, in draw
>> inframe=inframe)File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line 61, in draw_wrapper
>> draw(artist, renderer, *args, **kwargs)File "/usr/lib/python3/dist-packages/matplotlib/axes/_base.py", line 2324, in draw
>> a.draw(renderer)File "/usr/lib/python3/dist-packages/matplotlib/artist.py", line 61, in draw_wrapper
>> draw(artist, renderer, *args, **kwargs)
>>  File "/usr/local/lib/python3.5/dist-packages/cartopy/mpl/feature_artist.py", line 103, in draw
>> geoms = self._feature.intersecting_geometries(extent)File "/usr/local/lib/python3.5/dist-packages/cartopy/feature.py", line 113, in intersecting_geometriesreturn (geom for geom in self.geometries() if
>>  File "/usr/local/lib/python3.5/dist-packages/cartopy/feature.py", line 180, in geometries
>> name=self.name)
>>  File "/usr/local/lib/python3.5/dist-packages/cartopy/io/shapereader.py", line 246, in natural_earthreturn ne_downloader.path(format_dict)File "/usr/local/lib/python3.5/dist-packages/cartopy/io/__init__.py", line 223, in path
>> result_path = self.acquire_resource(target_path, format_dict)File "/usr/local/lib/python3.5/dist-packages/cartopy/io/shapereader.py", line 301, in acquire_resource
>> shapefile_online = self._urlopen(url)File "/usr/local/lib/python3.5/dist-packages/cartopy/io/__init__.py", line 262, in _urlopenreturn urlopen(url)File "/usr/lib/python3.5/urllib/request.py", line 163, in urlopenreturn opener.open(url, data, timeout)File "/usr/lib/python3.5/urllib/request.py", line 472, in open
>> response = meth(req, response)File "/usr/lib/python3.5/urllib/request.py", line 582, in http_response'http', request, response, code, msg, hdrs)File "/usr/lib/python3.5/urllib/request.py", line 504, in error
>> result = self._call_chain(*args)File "/usr/lib/python3.5/urllib/request.py", line 444, in _call_chain
>> result = func(*args)File "/usr/lib/python3.5/urllib/request.py", line 696, in http_error_302return self.parent.open(new, timeout=req.timeout)File "/usr/lib/python3.5/urllib/request.py", line 472, in open
>> response = meth(req, response)
>>  File "/usr/lib/python3.5/urllib/request.py", line 582, in http_response'http', request, response, code, msg, hdrs)
>>  File "/usr/lib/python3.5/urllib/request.py", line 510, in errorreturn self._call_chain(*args)File "/usr/lib/python3.5/urllib/request.py", line 444, in _call_chain
>> result = func(*args)
>>  File "/usr/lib/python3.5/urllib/request.py", line 590, in http_error_default
>>   raise HTTPError(req.full_url, code, msg, hdrs, fp)
>>   urllib.error.HTTPError: HTTP Error 404: Not FoundTraceback (most recent call last):
>>  File "tempAdv.py", line 72, in <module>
>>  plt.show()
>>  File "/usr/lib/python3/dist-packages/matplotlib/pyplot.py", line 244, in showreturn _show(*args, **kw)
>>  File "/usr/lib/python3/dist-packages/matplotlib/backend_bases.py", line 192, in __call__
>>  self.mainloop()
>>
>>
>>  File "/usr/lib/python3/dist-packages/matplotlib/backends/backend_tkagg.py", line 74, in mainloop
>>
>>  Tk.mainloop()
>>
>>  File "/usr/lib/python3.5/tkinter/__init__.py", line 408, in mainloop
>> _default_root.tk.mainloop(n)
>>
>>  AttributeError: 'NoneType' object has no attribute 'tk
>>
>>
>>
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>>
>
>
> --
> The best ruler, when he finishes his
> tasks and completes his affairs,
> the people say
> “It all happened naturally”
>
>                                          - Te Tao Ch'ing
>
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