title: How to replace text in a string column of a Pandas dataframe?
body: <p>I have a column in my dataframe like this:</p>
  <pre><code>range
  &quot;(2,30)&quot;
  &quot;(50,290)&quot;
  &quot;(400,1000)&quot;
  ... 
  </code></pre>
  <p>and I want to replace the <code>,</code> comma with <code>-</code> dash. I'm currently using this method but nothing is changed.</p>
  <pre><code>org_info_exc['range'].replace(',', '-', inplace=True)
  </code></pre>
  <p>Can anybody help?</p>