def set_animal_parameters(species, params):
        """Set parameters for animal species.

        :param species: String, name of animal species
        :param params: Dict with valid parameter specification for species
        """
        if species == "Herbivore":
            Herbivore.set_params(params)
        elif species == "Carnivore":
            Carnivore.set_params(params)
        else:
            raise ValueError("species needs to be either Herbivore or Carnivore!")
def reset_carnivore_params():
    """
    Set parameters of carnivores back to defaults
    """
    yield Carnivore.set_params(Carnivore.p)