pet

# Another class with a class attribute, used for validation purposes
class Pet:
	allowed = ['cat', 'dog', 'fish', 'rat']

	def __init__(self, name, species):
		if species not in Pet.allowed:
			raise ValueError(f"You can't have a {species} pet!")
		self.name = name
		self.species = species

	def set_species(self,species):
		if species not in Pet.allowed:
			raise ValueError(f"You can't have a {species} pet!")
		self.species = species

cat = Pet("Blue", "cat")
dog = Pet("Wyatt", "dog")