title: How to add a prefix to an existing python logging formatter
body: <p>In my code I get a logger from my client, then I do stuff and log my analysis to the logger.</p>
  
  <p>I want to add my own prefix to the logger but I don't want to create my own formatter, just to add my prefix to the existing one.</p>
  
  <p>In addition I want to remove my prefix once my code is done.</p>
  
  <p>From looking at the documentation I could only find ways to create new formatter but not to modify an existing one. Is there a way to do so?</p>