from enum import Enum


class UnitEnergy(str, Enum):
	""" The valid types of energy units. """ # noqa: E501
	"""# British Thermal Unit (BTU) <https://en.wikipedia.org/wiki/British_thermal_unit> """ # noqa: E501
	BTU = 'btu'
	"""# Electron Volts (eV) <https://en.wikipedia.org/wiki/Electronvolt> """ # noqa: E501
	ELECTRONVOLTS = 'electronvolts'
	"""# Joules (or watt-seconds) <https://en.wikipedia.org/wiki/Joule> """ # noqa: E501
	JOULES = 'joules'
	"""# Kilocalories (often just called calories) <https://en.wikipedia.org/wiki/Kilocalorie> """ # noqa: E501
	KILOCALORIES = 'kilocalories'
	"""# Kilowatt hours (kWh) <https://en.wikipedia.org/wiki/Kilowatt-hour> """ # noqa: E501
	KILOWATT_HOURS = 'kilowatt_hours'
	"""# Watt hours (Wh) <https://en.wikipedia.org/wiki/Kilowatt-hour> """ # noqa: E501
	WATT_HOURS = 'watt_hours'

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