docs: def lisp(self, foldername="INBOX", reverse=False, since=None, stream=sys.stdout):
          """Do JSON list of the folder to the stream.
  
          'since' allows the listing to be date filtered since that
          date. It should be a float, a time since epoch.
          """
          def fromval(hdr):
              if hdr:
                  return parseaddr(hdr)
  
          for folder, mk, m in self._list(foldername, reverse, since):
              try:
                  print(json.dumps({
                          'folder': folder.folder or foldername or "INBOX",
                          'key': "%s%s%s" % (folder.folder or foldername or "INBOX", SEPERATOR, mk),
                          'date':  str(m.date),
                          "flags": m.get_flags(),
                          'from': fromval(m.get_from()),
                          'subject': re.sub("\n|\'|\"", _escape, m.get_subject() or "")
                          }), file=stream)
              except IOError as e:
                  if e.errno == errno.EPIPE:
                      # Broken pipe we can ignore
                      return
                  self.logger.exception("whoops!")
              except Exception as e:
                  self.logger.exception("whoops!")