title: sklearn "numpy.dtype has the wrong size, try recompiling" in both pycharm and terminal
body: <p>I got "numpy.dtype has the wrong size, try recompiling" in both pycharm and terminal when compiling Sci-kit learning. I've upgraded all packages(numpy, scikit to the latest), nothing works.Python version is 2.7. Please help. Appreciate!  </p>
  
  <pre><code>    checking for nltk
      Traceback (most recent call last):
      File "startup.py", line 6, in &lt;module&gt;
      import nltk
        File "/Library/Python/2.7/site-packages/nltk/__init__.py", line 128, in &lt;module&gt;
        from nltk.chunk import *
        File "/Library/Python/2.7/site-packages/nltk/chunk/__init__.py", line 157, in &lt;module&gt;
     from nltk.chunk.api import ChunkParserI
    File "/Library/Python/2.7/site-packages/nltk/chunk/api.py", line 13, in &lt;module&gt;
      from nltk.parse import ParserI
    File "/Library/Python/2.7/site-packages/nltk/parse/__init__.py", line 79, in &lt;module&gt;
      from nltk.parse.transitionparser import TransitionParser
    File "/Library/Python/2.7/site-packages/nltk/parse/transitionparser.py", line 21, in &lt;module&gt;
      from sklearn.datasets import load_svmlight_file
    File "/Library/Python/2.7/site-packages/sklearn/__init__.py", line 57, in &lt;module&gt;
      from .base import clone
    File "/Library/Python/2.7/site-packages/sklearn/base.py", line 11, in &lt;module&gt;
      from .utils.fixes import signature
    File "/Library/Python/2.7/site-packages/sklearn/utils/__init__.py", line 10, in &lt;module&gt;
      from .murmurhash import murmurhash3_32
    File "numpy.pxd", line 155, in init sklearn.utils.murmurhash (sklearn/utils/murmurhash.c:5029)
  ValueError: numpy.dtype has the wrong size, try recompiling
  </code></pre>