code: def ask_overwrite(dest):
      
  
      msg = "File '{}' already exists. Overwrite file?".format(dest)
      if os.path.exists(dest):
          if yes_no_query(msg):
              os.remove(dest)
          else:
              sys.exit("Cancelling operation...")
docs: Check if file *dest* exists. If 'True', asks if the user wants
      to overwrite it (just remove the file for later overwrite).