Python "Invalid rgb arg "None""

Question

我有一个代码，创建并保存一个情节，使用matplotlib和python。代码在我的主管的笔记本电脑上完美地运行，他有matplotlib 1.1.1。然而，尽管我有一个较新版本的matplotlib(1.3.1)，但在执行此命令时，我得到以下错误:

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

我得到了该命令的以下回溯:

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 to rgb sequence

我在网上找不到任何有用的东西来解决这个错误。你知道我哪里做错了吗?

我也试着重写这个

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

:

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

但没有任何进展

Answer 1

我认为原因是facecolor没有'white'值。

从下面的链接来看，facecolor设置中没有'white'。

如果只使用plt会怎么样?savefig("路径")?我认为默认的背景色应该是白色。