title: Python: "ImportError: no module named xlrd" after installing xlrd using pip
body: <p>After installing xlrd using pip, I am still unable to get it to work in my script. I'm not sure if I am missing something completely obvious - please help!</p>
  
  <p>Currently, entering <code>pip list</code> on command line gives the following:</p>
  
  <pre><code>pip (9.0.1)
  setuptools (32.1.0)
  wheel (0.29.0)
  xlrd (1.0.0)
  </code></pre>
  
  <p>And entering <code>pip show xlrd</code> gives:</p>
  
  <pre><code>Name: xlrd
  Version: 1.0.0
  Summary: Library for developers to extract data from Microsoft Excel (tm) spreadsheet files
  Home-page: http://www.python-excel.org/
  Author: John Machin
  Author-email: sjmachin@lexicon.net
  License: BSD
  Location: /usr/local/lib/python2.7/site-packages
  Requires:
  </code></pre>
  
  <p>Yet, if I go into the python environment (via typing <code>python</code> on command line) and try to import, here's what I get:</p>
  
  <pre><code>Python 2.7.10 (default, Feb  7 2017, 00:08:15)
  [GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.34)] on darwin
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import xlrd
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: No module named xlrd
  </code></pre>
  
  <p>Anyone has encountered this problem before? I also have python 3 installed, and I downloaded xlrd via <code>pip3</code>. Yet <code>import xlrd</code> doesn't work on either versions (2 or 3).</p>