code: def from_rfc(datestring, use_dateutil=True):
      
      # Use dateutil's parser if possible
      if dateutil_available and use_dateutil:
          return parser.parse(datestring)
      else:
          parsed = parsedate(datestring)  # as a tuple
          timestamp = time.mktime(parsed)
          return datetime.datetime.fromtimestamp(timestamp)
docs: Parse a RFC822-formatted datetime string and return a datetime object.
  
      Use dateutil's parser if possible.
  
      https://stackoverflow.com/questions/885015/how-to-parse-a-rfc-2822-date-time-into-a-python-datetime