title: Import error when importing torch
body: <p>I didn't make any change but it suddenly doesn't work.</p>
  
  <pre><code>&gt;&gt;&gt; import torch
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "/Users/cheng/anaconda/envs/py36/lib/python3.6/site-packages/torch/__init__.py", line 56, in &lt;module&gt;
      from torch._C import *
  ImportError: numpy.core.multiarray failed to import
  </code></pre>
  
  <p>I tried <code>pip install numpy -I</code> but it didn't work. </p>
  
  <p>My OS is Mac OS X, and I tried to install by both pip and conda. Reinstall the env didn't work as well.</p>
  
  <p>pytorch version 0.3.1</p>
  
  <p>numpy version 1.14.2</p>
  
  <p>Solution:</p>
  
  <p>Do not name your file tokenize.py!</p>