无法导入％pylab内联的名称路径错误？

Question

两个月前，我已经安装了anaconda，并且正在使用Jupyter实验室。直到几天前一切正常，我发现了此错误

无法导入名称“ _path”

当我尝试运行该行时：％pylab inline 直到几天前，这件事还没有给我带来错误。

您知道为什么以及如何解决此问题吗？

完全错误是：

ImportError                               Traceback (most recent call last)
<ipython-input-1-a6e0d37a4680> in <module>
----> 1 get_ipython().run_line_magic('pylab', 'inline')

~\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py in run_line_magic(self, magic_name, line, _stack_depth)
   2305                 kwargs['local_ns'] = sys._getframe(stack_depth).f_locals
   2306             with self.builtin_trap:
-> 2307                 result = fn(*args, **kwargs)
   2308             return result
   2309 

<C:\Users\Alberto\Anaconda3\lib\site-packages\decorator.py:decorator-gen-110> in pylab(self, line)

~\Anaconda3\lib\site-packages\IPython\core\magic.py in <lambda>(f, *a, **k)
    185     # but it's overkill for just that one bit of state.
    186     def magic_deco(arg):
--> 187         call = lambda f, *a, **k: f(*a, **k)
    188 
    189         if callable(arg):

~\Anaconda3\lib\site-packages\IPython\core\magics\pylab.py in pylab(self, line)
    153             import_all = not args.no_import_all
    154 
--> 155         gui, backend, clobbered = self.shell.enable_pylab(args.gui, import_all=import_all)
    156         self._show_matplotlib_backend(args.gui, backend)
    157         print ("Populating the interactive namespace from numpy and matplotlib")

~\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py in enable_pylab(self, gui, import_all, welcome_message)
   3416         from IPython.core.pylabtools import import_pylab
   3417 
-> 3418         gui, backend = self.enable_matplotlib(gui)
   3419 
   3420         # We want to prevent the loading of pylab to pollute the user's

~\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py in enable_matplotlib(self, gui)
   3377                 gui, backend = pt.find_gui_and_backend(self.pylab_gui_select)
   3378 
-> 3379         pt.activate_matplotlib(backend)
   3380         pt.configure_inline_support(self, backend)
   3381 

~\Anaconda3\lib\site-packages\IPython\core\pylabtools.py in activate_matplotlib(backend)
    311     matplotlib.rcParams['backend'] = backend
    312 
--> 313     import matplotlib.pyplot
    314     matplotlib.pyplot.switch_backend(backend)
    315 

~\Anaconda3\lib\site-packages\matplotlib\pyplot.py in <module>
     29 from cycler import cycler
     30 import matplotlib
---> 31 import matplotlib.colorbar
     32 from matplotlib import style
     33 from matplotlib import _pylab_helpers, interactive

~\Anaconda3\lib\site-packages\matplotlib\colorbar.py in <module>
     30 
     31 import matplotlib as mpl
---> 32 import matplotlib.artist as martist
     33 import matplotlib.cbook as cbook
     34 import matplotlib.collections as collections

~\Anaconda3\lib\site-packages\matplotlib\artist.py in <module>
     14 import matplotlib
     15 from . import cbook, docstring, rcParams
---> 16 from .path import Path
     17 from .transforms import (Bbox, IdentityTransform, Transform, TransformedBbox,
     18                          TransformedPatchPath, TransformedPath)

~\Anaconda3\lib\site-packages\matplotlib\path.py in <module>
     19 import numpy as np
     20 
---> 21 from . import _path, rcParams
     22 from .cbook import (_to_unmasked_float_array, simple_linear_interpolation,
     23                     maxdict)

ImportError: cannot import name '_path'