title: RuntimeError: module compiled against API version 0xc but this version of numpy is 0xb
body: <p>I'm trying to learn Machine Learning, but I cannot resolve below error.</p>
  
  <p><strong>[My environment]</strong></p>
  
  <ul>
  <li>Mac High Sierra 10.13.2 </li>
  <li>Python3.4.5</li>
  <li>Numpy1.13.3</li>
  </ul>
  
  <p><strong>[Command]</strong></p>
  
  <pre><code>$ python3 -c "import jupyter, matplotlib, numpy, pandas, scipy, sklearn"
  </code></pre>
  
  <p><strong>[Error]</strong></p>
  
  <pre><code>RuntimeError: module compiled against API version 0xc but this version of numpy is 0xb
  Traceback (most recent call last):
    File "/Users/uekyo/ml/env/lib/python3.4/site-packages/pandas/__init__.py", line 26, in &lt;module&gt;
      from pandas._libs import (hashtable as _hashtable,
    File "/Users/uekyo/ml/env/lib/python3.4/site-packages/pandas/_libs/__init__.py", line 4, in &lt;module&gt;
      from .tslib import iNaT, NaT, Timestamp, Timedelta, OutOfBoundsDatetime
    File "pandas/_libs/tslib.pyx", line 1, in init pandas._libs.tslib
  ImportError: numpy.core.multiarray failed to import
  
  During handling of the above exception, another exception occurred:
  
  Traceback (most recent call last):
    File "&lt;string&gt;", line 1, in &lt;module&gt;
    File "/Users/uekyo/ml/env/lib/python3.4/site-packages/pandas/__init__.py", line 35, in &lt;module&gt;
      "the C extensions first.".format(module))
  ImportError: C extension: numpy.core.multiarray failed to import not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext --inplace --force' to build the C extensions first.
  </code></pre>
  
  <p><strong>[Things I tried]</strong></p>
  
  <p>I understood numpy is wrong. So I tried below things, but the error still appears.</p>
  
  <p>~1~</p>
  
  <pre><code>sudo mv /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/numpy_old
  </code></pre>
  
  <p>~2~</p>
  
  <pre><code>pip3 uninstall numpy
  pip3 install numpy  -I
  </code></pre>
  
  <p>Thanks.</p>