title: Removing numbers from strings in a pandas dataframe
body: <p>I have a dataframe in pandas, and in a column have a lot of names with numbers. How do I remove the number? example: <code>Andorra14</code>:</p>
  
  <pre><code>energy['Country'].head()  
  1.       Afghanistan   
  2.           Albania   
  3.           Algeria   
  4.    American Samoa    
  5.         Andorra14   
  Name: Country, dtype: object
  </code></pre>