class Temperature:
    temperature: float

    def __init__(self, temperature):
        self.temperature = temperature

    def __add__(self, operand):
        if operand.__class__ != '__main__.Temperature':
            raise ValueError(f"That's not a temperature object!  It's a {operand.__class__}!")
        self.temperature += operand.temperature
    
    def __str__(self):
        return f"{self.temperature=}"
    def insert_object(self, obj):
        self.temperature += obj.temperature

if __name__ == "__main__":
    oven = Temperature(180.0)
    chicken = Temperature(5.0)
    print(f"{chicken + oven=}")
    oven.insert_object(chicken)