from enum import Enum


class UnitDensity(str, Enum):
	""" The valid types for density units. """ # noqa: E501
	"""# Pounds per cubic feet. """ # noqa: E501
	LB_FT3 = 'lb:ft3'
	"""# Kilograms per cubic meter. """ # noqa: E501
	KG_M3 = 'kg:m3'

	def __str__(self) -> str:
		return str(self.value)
