code: def parse_date(string):
      '''Return a timestamp for the provided datestring, described by RFC 7231.'''
      parsed = email.utils.parsedate_tz(string)
      if parsed is None:
          raise ValueError("Invalid time.")
      parsed = list(parsed)
      # Default time zone is GMT/UTC
      parsed[9] = 0 if parsed[9] is None else parsed[9]
      return email.utils.mktime_tz(parsedf parse_date(string):
      '''Return a timestamp for the provided datestring, described by RFC 7231.'''
      parsed = email.utils.parsedate_tz(string)
      if parsed is None:
          raise ValueError("Invalid time.")
      parsed = list(parsed)
      # Default time zone is GMT/UTC
      parsed[9] = 0 if parsed[9] is None else parsed[9]
      return email.utils.mktime_tz(parsed)
docs: Return a timestamp for the provided datestring, described by RFC 7231.