code: def make_charlist(self):
          
  
          def worker_output(worker, output, error):
              """Worker finished callback."""
              self._charlist = output
              if error is None and output:
                  self._allow_highlight = True
                  self.rehighlight()
              self._allow_highlight = False
  
          text = to_text_string(self.document().toPlainText())
          tokens = self._lexer.get_tokens(text)
  
          # Before starting a new worker process make sure to end previous
          # incarnations
          self._worker_manager.terminate_all()
  
          worker = self._worker_manager.create_python_worker(
              self._make_charlist,
              tokens,
              self._tokmap,
              self.formats,
          )
          worker.sig_finished.connect(worker_output)
          worker.start()
docs: Parses the complete text and stores format for each character.