title: matplotlib.pyplot Error "ImportError: cannot import name '_path'"
body: <p>I came across an ImportError in the importing of matplotlib.pyplot on Windows 10 Pro</p>
  
  <p>Here is the full error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "C:\Users\****\Dropbox\Code\Python\lib_test.py", line 1, in &lt;module&gt;
      import matplotlib.pyplot as plt
    File "C:\Users\****\AppData\Roaming\Python\Python36\site-packages\matplotlib\pyplot.py", line 31, in &lt;module&gt;
      import matplotlib.colorbar
    File "C:\Users\****\AppData\Roaming\Python\Python36\site-packages\matplotlib\colorbar.py", line 32, in &lt;module&gt;
      import matplotlib.artist as martist
    File "C:\Users\****\AppData\Roaming\Python\Python36\site-packages\matplotlib\artist.py", line 16, in &lt;module&gt;
      from .path import Path
    File "C:\Users\****\AppData\Roaming\Python\Python36\site-packages\matplotlib\path.py", line 21, in &lt;module&gt;
      from . import _path, rcParams
  ImportError: cannot import name '_path'
  </code></pre>
  
  <p>Here is the script:</p>
  
  <pre><code>import matplotlib.pyplot as plt
  
  squares = [1, 4, 9, 16, 25]
  plt.plot(squares)
  plt.show()
  </code></pre>
  
  <p>If anyone could help me, much appreciated.</p>