title: Does "Find-Replace whole word only" exist in python?
body: <p>Does "Find-Replace whole word only" exist in python?</p>
  
  <p>e.g. "old string oldstring boldstring bold"
  if i want to replace 'old' with 'new', new string should look like,</p>
  
  <p>"new string oldstring boldstring bold"</p>
  
  <p>can somebody help me?</p>