class TestThis(object):
	'''Demonstrates how to use property() as a decorator
	The power of this will be in declaring essentially private variables
	Property has built in property.setter, property.getter, property.deleter'''
	def __init__(self):
		self.voltage = 0

	@property
	def voltage(self):
		return self._voltage
	
	@voltage.setter
	def voltage(self, value):
		'''Variables inherit name of function, clearly. Can place tests on things here, if desired'''
		if value < 0:
			print('Voltage can not be negative')
			self._voltage=0
		else:
			self._voltage = value
	
	@voltage.deleter
	def voltage(self):
		print('Deleting voltage')
		del self._voltage

	@property
	def higher(self):
		self._higher = self.voltage*3
		return self._higher
	
	@higher.deleter
	def higher(self):
		print('deleted higher')
		del self._higher

if __name__=='__main__':
	x = TestThis()
	x.voltage = -217
	print(x.voltage)
	print(x.higher)
	x.voltage = 3
	print(x.higher)
	del x.higher