matplotlib - Python "Invalid rgb arg "None"" -

i have code creates , saves plot, using matplotlib , python. code runs flawlessly @ laptop of supervisor, has matplotlib 1.1.1. however, despite fact have newer version of matplotlib(1.3.1) following error when executing command:

plt.savefig("outputs/" + run_uuid +".pdf", facecolor='white', bbox_inches='tight', pad_inches=0.0) 

i following traceback on command:

traceback (most recent call last):   file "vis.py", line 1116, in <module>     plt.savefig("outputs/" + run_uuid +".pdf", facecolor='white', bbox_inches='tight', pad_inches=0.0)   file "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 561, in savefig     return fig.savefig(*args, **kwargs)   file "/usr/lib/pymodules/python2.7/matplotlib/figure.py", line 1421, in savefig     self.canvas.print_figure(*args, **kwargs)   file "/usr/lib/pymodules/python2.7/matplotlib/backend_bases.py", line 2167, in print_figure     **kwargs)   file "/usr/lib/pymodules/python2.7/matplotlib/backend_bases.py", line 1952, in print_pdf     return pdf.print_pdf(*args, **kwargs)   file "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_pdf.py", line 2352, in print_pdf     self.figure.draw(renderer)   file "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in draw_wrapper     draw(artist, renderer, *args, **kwargs)   file "/usr/lib/pymodules/python2.7/matplotlib/figure.py", line 1034, in draw     func(*args)   file "/usr/lib/pymodules/python2.7/mpl_toolkits/axisartist/axislines.py", line 774, in draw     super(axes, self).draw(renderer, inframe)   file "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in draw_wrapper     draw(artist, renderer, *args, **kwargs)   file "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 2086, in draw     a.draw(renderer)   file "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in draw_wrapper     draw(artist, renderer, *args, **kwargs)   file "/usr/lib/pymodules/python2.7/matplotlib/lines.py", line 530, in draw     gc.set_foreground(ln_color_rgba)   file "/usr/lib/pymodules/python2.7/matplotlib/backend_bases.py", line 921, in set_foreground     self._rgb = colors.colorconverter.to_rgba(fg)   file "/usr/lib/pymodules/python2.7/matplotlib/colors.py", line 365, in to_rgba     'to_rgba: invalid rgba arg "%s"\n%s' % (str(arg), exc)) valueerror: to_rgba: invalid rgba arg "none" to_rgb: invalid rgb arg "none" cannot convert argument rgb sequence 

i couldn't find useful in net error. know doing wrong?

i tried rewrite this

plt.savefig("outputs/" + run_uuid +".pdf", facecolor='white', bbox_inches='tight', pad_inches=0.0) 

to this:

plt.savefig("outputs/" + run_uuid +".pdf") 

but without progress

i think reason facecolor doesn't have value of 'white'.

from the following link, no 'white' exists in facecolor setting.

what if use plt.savefig("your path")? think default background color should white.