def remove_event(self, name=None, time=None, chan=None):
        """get events inside window."""
        events = self.rater.find('events')
        if name is not None:
            pattern = "event_type[@type='" + name + "']"
        else:
            pattern = "event_type"

        if chan is not None:
            if isinstance(chan, (tuple, list)):
                chan = ', '.join(chan)

        for e_type in list(events.iterfind(pattern)):

            for e in e_type:

                event_start = float(e.find('event_start').text)
                event_end = float(e.find('event_end').text)
                event_chan = e.find('event_chan').text

                if time is None:
                    time_cond = True
                else:
                    time_cond = allclose(time[0], event_start) and allclose(
                            time[1], event_end)

                if chan is None:
                    chan_cond = True
                else:
                    chan_cond = event_chan == chan

                if time_cond and chan_cond:
                    e_type.remove(e)

        self.save()
get events inside window.