class Sirkel:

	def __init__(self, radius):
		self._radius = radius

	def hentDiameter(self):
		return self._radius * 2

	def hentOmkrets(self):
		return self.hentDiameter() * 3.1415

	def hentAreal(self):
		return (self._radius ** 2) * 3.1415 


	def __eq__(self, sirkel2):
		return self.hentDiameter() == sirkel2.hentDiameter()

sirkel1 = Sirkel(4)
sirkel2 = Sirkel(4)

print(sirkel1 == sirkel2)
print(sirkel1 is sirkel2)