---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-6-368972b0f1c2> in <module>
      1 plt.plot([10,100], [10,100])
----> 2 plt.savefig('test.pdf')

~/.local/lib/python3.7/site-packages/matplotlib/pyplot.py in savefig(*args, **kwargs)
    964 def savefig(*args, **kwargs):
    965     fig = gcf()
--> 966     res = fig.savefig(*args, **kwargs)
    967     fig.canvas.draw_idle()   # need this if 'transparent=True' to reset colors
    968     return res

~/.local/lib/python3.7/site-packages/matplotlib/figure.py in savefig(self, fname, transparent, **kwargs)
   3013                 patch.set_edgecolor('none')
   3014 
-> 3015         self.canvas.print_figure(fname, **kwargs)
   3016 
   3017         if transparent:

~/.local/lib/python3.7/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, pad_inches, bbox_extra_artists, backend, **kwargs)
   2259                         orientation=orientation,
   2260                         bbox_inches_restore=_bbox_inches_restore,
-> 2261                         **kwargs)
   2262             finally:
   2263                 if bbox_inches and restore_bbox:

~/.local/lib/python3.7/site-packages/matplotlib/backend_bases.py in wrapper(*args, **kwargs)
   1667             kwargs.pop(arg)
   1668 
-> 1669         return func(*args, **kwargs)
   1670 
   1671     return wrapper

~/.local/lib/python3.7/site-packages/matplotlib/_api/deprecation.py in wrapper(*inner_args, **inner_kwargs)
    429                          else deprecation_addendum,
    430                 **kwargs)
--> 431         return func(*inner_args, **inner_kwargs)
    432 
    433     return wrapper

~/.local/lib/python3.7/site-packages/matplotlib/backends/backend_pdf.py in print_pdf(self, filename, dpi, bbox_inches_restore, metadata)
   2723                 RendererPdf(file, dpi, height, width),
   2724                 bbox_inches_restore=bbox_inches_restore)
-> 2725             self.figure.draw(renderer)
   2726             renderer.finalize()
   2727             if not isinstance(filename, PdfPages):

~/.local/lib/python3.7/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     72     @wraps(draw)
     73     def draw_wrapper(artist, renderer, *args, **kwargs):
---> 74         result = draw(artist, renderer, *args, **kwargs)
     75         if renderer._rasterizing:
     76             renderer.stop_rasterizing()

~/.local/lib/python3.7/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     49                 renderer.start_filter()
     50 
---> 51             return draw(artist, renderer, *args, **kwargs)
     52         finally:
     53             if artist.get_agg_filter() is not None:

~/.local/lib/python3.7/site-packages/matplotlib/figure.py in draw(self, renderer)
   2789             self.patch.draw(renderer)
   2790             mimage._draw_list_compositing_images(
-> 2791                 renderer, self, artists, self.suppressComposite)
   2792 
   2793             for sfig in self.subfigs:

~/.local/lib/python3.7/site-packages/matplotlib/image.py in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
    130     if not_composite or not has_images:
    131         for a in artists:
--> 132             a.draw(renderer)
    133     else:
    134         # Composite any adjacent images together

~/.local/lib/python3.7/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     49                 renderer.start_filter()
     50 
---> 51             return draw(artist, renderer, *args, **kwargs)
     52         finally:
     53             if artist.get_agg_filter() is not None:

~/.local/lib/python3.7/site-packages/matplotlib/_api/deprecation.py in wrapper(*inner_args, **inner_kwargs)
    429                          else deprecation_addendum,
    430                 **kwargs)
--> 431         return func(*inner_args, **inner_kwargs)
    432 
    433     return wrapper

~/.local/lib/python3.7/site-packages/matplotlib/axes/_base.py in draw(self, renderer, inframe)
   2919             renderer.stop_rasterizing()
   2920 
-> 2921         mimage._draw_list_compositing_images(renderer, self, artists)
   2922 
   2923         renderer.close_group('axes')

~/.local/lib/python3.7/site-packages/matplotlib/image.py in _draw_list_compositing_images(renderer, parent, artists, suppress_composite)
    130     if not_composite or not has_images:
    131         for a in artists:
--> 132             a.draw(renderer)
    133     else:
    134         # Composite any adjacent images together

~/.local/lib/python3.7/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     49                 renderer.start_filter()
     50 
---> 51             return draw(artist, renderer, *args, **kwargs)
     52         finally:
     53             if artist.get_agg_filter() is not None:

~/.local/lib/python3.7/site-packages/matplotlib/axis.py in draw(self, renderer, *args, **kwargs)
   1144 
   1145         for tick in ticks_to_draw:
-> 1146             tick.draw(renderer)
   1147 
   1148         # scale up the axis label box to also find the neighbors, not

~/.local/lib/python3.7/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     49                 renderer.start_filter()
     50 
---> 51             return draw(artist, renderer, *args, **kwargs)
     52         finally:
     53             if artist.get_agg_filter() is not None:

~/.local/lib/python3.7/site-packages/matplotlib/axis.py in draw(self, renderer)
    300         for artist in [self.gridline, self.tick1line, self.tick2line,
    301                        self.label1, self.label2]:
--> 302             artist.draw(renderer)
    303         renderer.close_group(self.__name__)
    304         self.stale = False

~/.local/lib/python3.7/site-packages/matplotlib/artist.py in draw_wrapper(artist, renderer, *args, **kwargs)
     49                 renderer.start_filter()
     50 
---> 51             return draw(artist, renderer, *args, **kwargs)
     52         finally:
     53             if artist.get_agg_filter() is not None:

~/.local/lib/python3.7/site-packages/matplotlib/text.py in draw(self, renderer)
    723                     textrenderer.draw_tex(gc, x, y, clean_line,
    724                                           textobj._fontproperties, angle,
--> 725                                           mtext=mtext)
    726                 else:
    727                     textrenderer.draw_text(gc, x, y, clean_line,

~/.local/lib/python3.7/site-packages/matplotlib/_api/deprecation.py in wrapper(*inner_args, **inner_kwargs)
    429                          else deprecation_addendum,
    430                 **kwargs)
--> 431         return func(*inner_args, **inner_kwargs)
    432 
    433     return wrapper

~/.local/lib/python3.7/site-packages/matplotlib/backends/backend_pdf.py in draw_tex(self, gc, x, y, s, prop, angle, ismath, mtext)
   2190         for x1, y1, dvifont, glyph, width in page.text:
   2191             if dvifont != oldfont:
-> 2192                 pdfname = self.file.dviFontName(dvifont)
   2193                 seq += [['font', pdfname, dvifont.size]]
   2194                 oldfont = dvifont

~/.local/lib/python3.7/site-packages/matplotlib/backends/backend_pdf.py in dviFontName(self, dvifont)
    862             return dvi_info.pdfname
    863 
--> 864         tex_font_map = dviread.PsfontsMap(dviread.find_tex_file('pdftex.map'))
    865         psfont = tex_font_map[dvifont.texname]
    866         if psfont.filename is None:

~/.local/lib/python3.7/site-packages/matplotlib/dviread.py in __new__(cls, filename)
    849         self._font = {}
    850         self._filename = os.fsdecode(filename)
--> 851         with open(filename, 'rb') as file:
    852             self._parse(file)
    853         return self

FileNotFoundError: [Errno 2] No such file or directory: ''