How to use the gillespy2.core.events.EventAssignment function in gillespy2

Attributes
        ----------
        args : dict
            A json representation of an event assignment.
        species : list
            List of GillesPy2 species.
        parameter : list
            List of GillesPy2 parameters.
        '''
        expression = args['expression']
        variable = list(filter(lambda s: s.name == args['variable']['name'], species))
        if not len(variable):
            variable = list(filter(lambda p: p.name == args['variable']['name'], parameters))

        return EventAssignment(variable=variable[0], expression=expression)