title: Removing b'' from string column in a pandas dataframe
body: <p>I have a data frame as taken from SDSS database. Example data is here.</p>
  
  <p><a href="https://i.stack.imgur.com/9fiNu.png" rel="noreferrer"><img src="https://i.stack.imgur.com/9fiNu.png" alt="img"></a></p>
  
  <p>I want to remove the character 'b' from <code>data['class']</code>. I tried</p>
  
  <pre><code>data['class'] = data['class'].replace("b','')
  </code></pre>
  
  <p>But I am not getting the result.</p>