title: TensorFlow import error: no module named _pywrap_tensorflow
body: <p>I'm trying to set up TensorFlow on Mac following the <a href="https://www.tensorflow.org/versions/r0.11/get_started/os_setup.html#pip-installation" rel="nofollow noreferrer">TensorFlow install docs</a>.</p>
  
  <p>However after completing the outlined steps and trying "<code>import tensorflow as tf</code>", I'm getting the following error trace:</p>
  
  <pre><code>&gt;&gt;&gt; import tensorflow as tf
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "/usr/local/lib/python2.7/site-packages/tensorflow/__init__.py", line 23, in &lt;module&gt;
      from tensorflow.python import *
    File "/usr/local/lib/python2.7/site-packages/tensorflow/python/__init__.py", line 49, in &lt;module&gt;
      from tensorflow.python import pywrap_tensorflow
    File "/usr/local/lib/python2.7/site-packages/tensorflow/python/pywrap_tensorflow.py", line 21, in &lt;module&gt;
      _pywrap_tensorflow = swig_import_helper()
    File "/usr/local/lib/python2.7/site-packages/tensorflow/python/pywrap_tensorflow.py", line 20, in swig_import_helper
      return importlib.import_module('_pywrap_tensorflow')
    File "/usr/local/Cellar/python/2.7.9/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
      __import__(name)
  ImportError: No module named _pywrap_tensorflow
  </code></pre>
  
  <p>I have already installed and used TensorFlow on my machine before and never encountered this issue.</p>