13_even_more_classes.py

class Temperature(object):
    def __init__(self, T=0, unit='C'):
        if unit == 'C':
            self.C = T
        elif unit == 'F':
            self.F = T
        elif unit == 'K':
            self.K = T
        else:
            raise ValueError

    @property
    def C(self):
        return self.K - 273.15

    @C.setter
    def C(self, T):
        self.K = T + 273.15

    @property
    def F(self):
        return (self.C * 1.8) + 32

    @F.setter
    def F(self, T):
        self.C = (T - 32) / 1.8

freezing = Temperature(0, 'C')
print(freezing.C)
print(freezing.F)
print(freezing.K)

boiling = copy.copy(freezing)
boiling.C = 100
print(boiling.C)
print(boiling.F)
print(boiling.K)