熊猫绘制导致iPython错误的选项

Question

我正在尝试一些这里上显示的熊猫图样。但是，每当我按照建议使用以下命令设置样式选项时，

pd.options.display.mpl_style = 'default'

我得到以下错误

In [6]: Traceback (most recent call last):
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/figure.py", line 1079, in draw
    func(*args)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/axes/_base.py", line 2092, in draw
    a.draw(renderer)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/axis.py", line 1105, in draw
    renderer)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/axis.py", line 1054, in _get_tick_bboxes
    extent = tick.label1.get_window_extent(renderer)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/text.py", line 741, in get_window_extent
    bbox, info, descent = self._get_layout(self._renderer)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/text.py", line 311, in _get_layout
    ismath=False)
  File "/Users/seanwhipple/py27/lib/python2.7/site-packages/matplotlib/backends/backend_macosx.py", line 166, in get_text_width_height_descent
    six.text_type(s), family, size, weight, style)
TypeError: bad argument type for built-in operation

If you suspect this is an IPython bug, please report it at:
    https://github.com/ipython/ipython/issues
or send an email to the mailing list at ipython-dev@scipy.org

You can print a more detailed traceback right now with "%tb", or use "%debug"
to interactively debug it.

Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
    %config Application.verbose_crash=True

在编写测试代码时，我发现当我添加pd.options行时，会生成错误。有什么原因吗？我已经将numpy、pandas和matplotlib更新为使用pip --upgrade的最新版本。

Answer 1

这是与https://github.com/matplotlib/matplotlib/issues/3470相同的问题--问题是，由于rcparams验证中的一个微妙的疏忽，macOSX后端期望的是一个由字节字符串对象组成的列表，因此事情就发生了变化。

最简单的方法是使用macosx后端以外的任何其他后端。正在进行中的修补程序(https://github.com/matplotlib/matplotlib/pull/3564)，但它已经变成了一个泥潭的其他微妙的错误。

仍在试图决定这是否需要在1.4.1上成为一个阻滞剂。