title: What does DataFrame.select_dtypes(exclude=['object']) actually do?
body: <p>I'm learning data science with the help of an online course. While learning about filtering specific datatype from a DataFrame object in Pandas, I came across this line of code:</p>
  
  <pre><code>df = df.select_dtypes(exclude=['object'])
  </code></pre>
  
  <p>The purpose of the module was to show how to get only numeric datatype. 
  I'm not able to figure out what all things or data-types are included in the <code>object</code> type.</p>
  
  <p>I tried to understand this from documentation given on Scipy Oficial</p>
  
  <p><a href="https://docs.scipy.org/doc/numpy-1.13.0/reference/arrays.dtypes.html" rel="nofollow noreferrer">https://docs.scipy.org/doc/numpy-1.13.0/reference/arrays.dtypes.html</a></p>