title: Changing pandas column value using like
body: <p>Within my dataframe, df, I would like to divide the Qty column by 10 if in the Description column it contains the substring 'BC'</p>
  <p><a href="https://i.stack.imgur.com/BnQSb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BnQSb.png" alt="enter image description here" /></a></p>
  <p>In the past I have only had to deal with the case if the cell equals a value like in the below, so am not sure how to tackle this one</p>
  <pre><code>df.loc[df.Description == 'ABC', 'Qty'] = df.Qty/10
  </code></pre>