title: Import Error: cannot import pivot_simple
body: <p>I am using Ubuntu system with python 2.7  and pandas version of 0.19.I have been trying to run a python file and this error keeps on showing up- </p>
  
  <pre><code>&gt;&gt;&gt; import file.py as x  
     Traceback (most recent call last):   
     File "&lt;stdin&gt;", line 1, in &lt;module&gt;  
     File "file.py", line 4, in &lt;module&gt;  
     import pandas as pd
     File "/home/user/.local/lib/python2.7/site-packages/pandas/__init__.py",      line 39, in &lt;module&gt;
     from pandas.core.api import *   
     File "/home/user/.local/lib/python2.7/site-packages/pandas/core/api.py",  line 20, in &lt;module&gt;
     from pandas.core.reshape import (pivot_simple as pivot, get_dummies,  
     ImportError: cannot import name pivot_simple
  </code></pre>
  
  <p>Please help me in resolving the issue by telling the possible issues for this error and the way it can be removed.</p>
  
  <p>Thanks!</p>