Python 3.x 温度转换，无需调用方法

我正在寻找一种打印t1的解决方案，转换成kelvins，而不调用下面的任何方法。关于t1是如何创建的以及打印输出的解决方案，请参见底部。我希望很快能听到一些反馈

class Temperature:
    # --- YOUR CODE STARTS HERE
    val = 0


    def __init__(self,val, unit):
        self.val = val
        self.unit = unit

    def celcius(self):
        if self.unit == "F":
            new_temp = (self.val - 32)*(5/9)
            self.unit = "F"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        elif self.unit == "K":
            new_temp = self.val - 273.15
            self.unit = "F"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        else:
            return round(self.val,2), self.unit


    def fahrenheit(self):
        if self.unit == "C":
            new_temp = (self.val * (9/5)) + 32
            self.unit = "F"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        elif self.unit == "K":
            new_temp = (val - 273.15) * (9/5) + 32
            self.unit = "F"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        else:
            return round(self.val,2), self.unit

    def kelvin(self):
        if self.unit == "F":
            new_temp = (self.val - 32)*(5/9) + 273.15
            self.unit = "K"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        elif self.unit == "C":
            new_temp = self.val + 273.15
            self.unit = "K"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        else:
            return round(self.val,2), self.unit

    def __str__(self):





t1 = Temperature(31, "F")

print(t1)

---

问题是打印t1以获得272.59 K的结果。以下是我可以做的，以满足您的要求：

class Temperature:
    # --- YOUR CODE STARTS HERE
    val = 0


    def __init__(self,val, unit):
        self.val = val
        self.unit = unit

    def celcius(self):
        if self.unit == "F":
            new_temp = (self.val - 32)*(5/9)
            self.unit = "F"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        elif self.unit == "K":
            new_temp = self.val - 273.15
            self.unit = "F"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        else:
            return round(self.val,2), self.unit


    def fahrenheit(self):
        if self.unit == "C":
            new_temp = (self.val * (9/5)) + 32
            self.unit = "F"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        elif self.unit == "K":
            new_temp = (val - 273.15) * (9/5) + 32
            self.unit = "F"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        else:
            return round(self.val,2), self.unit

    def kelvin(self):
        if self.unit == "F":
            new_temp = (self.val - 32)*(5/9) + 273.15
            self.unit = "K"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        elif self.unit == "C":
            new_temp = self.val + 273.15
            self.unit = "K"
            new_unit = self.unit
            return round(new_temp,2), new_unit
        else:
            return round(self.val,2), self.unit

    def __str__(self):
        self.val,self.unit = self.kelvin()
        return str(self.val) + ' ' + str(self.unit)


t1 = Temperature(31, "F")

print(t1)

---

希望这有帮助。

您只需要实现_ustr__;方法。 它就像Java的toString（）

这将实现以下目的：

def __str__(self):
    return "%f %s"%(self.val,self.unit)