AttributeError                            Traceback (most recent call last)
<ipython-input-43-94eadd48f4c3> in <module>()
      1 plt.rc("axes", prop_cycle = 'cycler(mfc=["k","w"])')
----> 2 plt.errorbar([1,3,2],[2,3,1],yerr=1)

C:\WinPython362\python-3.6.2rc2.amd64\lib\site-packages\matplotlib\pyplot.py in errorbar(x, y, yerr, xerr, fmt, ecolor, elinewidth, capsize, barsabove, lolims, uplims, xlolims, xuplims, errorevery, capthick, hold, data, **kwargs)
   2850                           xlolims=xlolims, xuplims=xuplims,
   2851                           errorevery=errorevery, capthick=capthick, data=data,
-> 2852                           **kwargs)
   2853     finally:
   2854         ax._hold = washold

C:\WinPython362\python-3.6.2rc2.amd64\lib\site-packages\matplotlib\__init__.py in inner(ax, *args, **kwargs)
   1708                     warnings.warn(msg % (label_namer, func.__name__),
   1709                                   RuntimeWarning, stacklevel=2)
-> 1710             return func(ax, *args, **kwargs)
   1711         pre_doc = inner.__doc__
   1712         if pre_doc is None:

C:\WinPython362\python-3.6.2rc2.amd64\lib\site-packages\matplotlib\axes\_axes.py in errorbar(self, x, y, yerr, xerr, fmt, ecolor, elinewidth, capsize, barsabove, lolims, uplims, xlolims, xuplims, errorevery, capthick, **kwargs)
   3089                 xo, _ = xywhere(x, lower, noylims & everymask)
   3090                 lo, uo = xywhere(lower, upper, noylims & everymask)
-> 3091                 barcols.append(self.vlines(xo, lo, uo, **eb_lines_style))
   3092                 if capsize > 0:
   3093                     caplines.append(mlines.Line2D(xo, lo, marker='_',

C:\WinPython362\python-3.6.2rc2.amd64\lib\site-packages\matplotlib\__init__.py in inner(ax, *args, **kwargs)
   1708                     warnings.warn(msg % (label_namer, func.__name__),
   1709                                   RuntimeWarning, stacklevel=2)
-> 1710             return func(ax, *args, **kwargs)
   1711         pre_doc = inner.__doc__
   1712         if pre_doc is None:

C:\WinPython362\python-3.6.2rc2.amd64\lib\site-packages\matplotlib\axes\_axes.py in vlines(self, x, ymin, ymax, colors, linestyles, label, **kwargs)
   1062                                      linestyles=linestyles, label=label)
   1063         self.add_collection(lines, autolim=False)
-> 1064         lines.update(kwargs)
   1065 
   1066         if len(x) > 0:

C:\WinPython362\python-3.6.2rc2.amd64\lib\site-packages\matplotlib\artist.py in update(self, props)
    845         try:
    846             ret = [_update_property(self, k, v)
--> 847                    for k, v in props.items()]
    848         finally:
    849             self.eventson = store

C:\WinPython362\python-3.6.2rc2.amd64\lib\site-packages\matplotlib\artist.py in <listcomp>(.0)
    845         try:
    846             ret = [_update_property(self, k, v)
--> 847                    for k, v in props.items()]
    848         finally:
    849             self.eventson = store

C:\WinPython362\python-3.6.2rc2.amd64\lib\site-packages\matplotlib\artist.py in _update_property(self, k, v)
    838                 func = getattr(self, 'set_' + k, None)
    839                 if not callable(func):
--> 840                     raise AttributeError('Unknown property %s' % k)
    841                 return func(v)
    842 

AttributeError: Unknown property markerfacecolor