title: how do I use f-string with regex in Python
body: <p>This code works if I use raw strings only but as soon as I add f to r. It stops working. Is there a way to make f-strings work with raw strings for re?</p>
  
  <pre><code>import re
  
  lines = '''
  
      04/20/2009; 04/20/09; 4/20/09; 4/3/09
      Mar-20-2009; Mar 20, 2009; March 20, 2009; Mar. 20, 2009; Mar 20 2009;
      20 Mar 2009; 20 March 2009; 20 Mar. 2009; 20 March, 2009
      Mar 20th, 2009; Mar 21st, 2009; Mar 22nd, 2009
      Feb 2009; Sep 2009; Oct 2010
      6/2008; 12/2009
      2009; 2010
  
  '''
  rmonth = 'a'
  regex = fr'(\d{1,2})/(\d{1,2})/(\d{4}|\d{2})'
  date_found = re.findall(regex, lines)
  
  date_found
  </code></pre>