title: Example of subclassing string.Template in Python?
body: <p>I haven't been able to find a good example of subclassing string.Template in Python, even though I've seen multiple references to doing so in documentation.</p>
  
  <p>Are there any examples of this on the web?</p>
  
  <p>I want to change the $ to be a different character and maybe change the regex for identifiers.</p>