<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _UpdateCounters(self, event):
 """Updates the counters. Args: event (EventObject):
 event. """

    self._session.parsers_counter['total'] += 1

    # Here we want the name of the parser or plugin not the parser chain.
    parser_name = getattr(event, 'parser', '')
    _, _, parser_name = parser_name.rpartition('/')
    if not parser_name:
      parser_name = 'N/A'
    self._session.parsers_counter[parser_name] += 1