code: def return_markers(self):
          
          markers = []
          for mrk in self.task.events.tsv:
              markers.append({
                  'start': float(mrk['onset']),
                  'end': float(mrk['onset']) + float(mrk['duration']),
                  'name': mrk['trial_type']
              })
  
          return markers
docs: Return all the markers (also called triggers or events).
  
          Returns
          -------
          list of dict
              where each dict contains 'name' as str, 'start' and 'end' as float
              in seconds from the start of the recordings, and 'chan' as list of
              str with the channels involved (if not of relevance, it's None).