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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 irfs(self, **kwargs):
 """ Get the name of IFRs associted with a particular dataset """

        dsval = kwargs.get('dataset', self.dataset(**kwargs))
        tokens = dsval.split('_')
        irf_name = "%s_%s_%s" % (DATASET_DICTIONARY['%s_%s' % (tokens[0], tokens[1])],
                                 EVCLASS_NAME_DICTIONARY[tokens[3]],
                                 kwargs.get('irf_ver'))
        return irf_name