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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def event(self, **kwargs):
 """Updates attached streams and triggers events Automatically find streams matching the supplied kwargs to update and trigger events on them. Args: **kwargs: Events to update streams with """

        if self.callback.noargs and self.streams == []:
            self.param.warning(
                'No streams declared. To update a DynamicMaps using '
                'generators (or callables without arguments) use streams=[Next()]')
            return
        if self.streams == []:
            self.param.warning('No streams on DynamicMap, calling event '
                               'will have no effect')
            return

        stream_params = set(util.stream_parameters(self.streams))
        invalid = [k for k in kwargs.keys() if k not in stream_params]
        if invalid:
            msg = 'Key(s) {invalid} do not correspond to stream parameters'
            raise KeyError(msg.format(invalid = ', '.join('%r' % i for i in invalid)))

        streams = []
        for stream in self.streams:
            contents = stream.contents
            applicable_kws = {k:v for k,v in kwargs.items()
                              if k in set(contents.keys())}
            if not applicable_kws and contents:
                continue
            streams.append(stream)
            rkwargs = util.rename_stream_kwargs(stream, applicable_kws, reverse=True)
            stream.update(**rkwargs)

        Stream.trigger(streams)