title: Why don't I have xlrd?
body: <p>I installed <code>pandas</code> and <code>matplotlib</code> using <code>pip3 install</code>. I then ran this script:</p>
  
  <pre><code>import pandas as pd
  import matplotlib.pyplot as plt
  data = pd.ExcelFile("Obes-phys-acti-diet-eng-2014-tab.xls")
  print (data.sheet_names)
  </code></pre>
  
  <p>and received this error:</p>
  
  <pre class="lang-none prettyprint-override"><code>dhcp-169-233-172-97:Obesity juliushamilton$ python3 ob.py
  Traceback (most recent call last):
    File "ob.py", line 4, in &lt;module&gt;
      data = pd.ExcelFile("Obes-phys-acti-diet-eng-2014-tab.xls")
    File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/pandas/io/excel.py", line 169, in __init__
      import xlrd  # throw an ImportError if we need to
  ImportError: No module named 'xlrd'
  </code></pre>
  
  <p>Why is the necessary <code>xlrd</code> missing?</p>