有没有更好的方法来解决这个问题，创建一个类来为计算器调用不同的函数？（Python 3.3）

Question

I am really new at this whole programming thing. The below code works good, I was just wondering if there are other ways to implement this.

Should my init function be that complex or should I call another function with it to can call my other functions?

class calculator():

    def __init__(self):
        while True:
            self.ask = str(input("What would you like to calculate? Degrees, Trapezoids, or Circles?"))
            if self.ask == "degrees":
                self.f_to_c_calc()
            elif self.ask == "trapezoid":
                self.calc_trapeziod_area()
            elif self.ask == "circle":
                self.cal_circle()
            else:
                break

    def f_to_c_calc(self):
        temp = int(input("How warm is it out?"))
        f_or_c = str(input("Is it Celsius or Fahrenheit?"))
        if f_or_c == "c" or f_or_c == "C":
            updatedtemp = float(temp * 9 / 5 + 32)
            print (updatedtemp, "°F")
        elif f_or_c == "f" or f_or_c == "F":
            updatedtemp = float((temp - 32) * 5 / 9)
            print (updatedtemp, "°C")

    def calc_trapeziod_area(self):
        height = float(input("What is the height of the trapezoid?"))
        length1 = float(input("What is the length of the top base?"))
        length2 = float(input("What is the length of the bottom base?"))
        formula = float((1 / 2 * (length1 + length2)) * height)
        print ("Your Trapezoids area is:",(formula))

    def cal_circle(self):
        pi = float(245850922 / 78256779)
        rad_or_diam = str(input("Is the number the Diameter or Radius?"))
        if rad_or_diam == "r" or rad_or_diam == "radius":
            radius = float(input("What is the radius of the circle?"))
            area_circ = float(pi * radius ** 2)
            print (area_circ)
        elif rad_or_diam == "d" or rad_or_diam == "diameter":
            diameter = float(input("What is the Diameter of the circle?"))
            area_circ = float(pi * diameter)
            print (area_circ)

if __name__ == "__main__":
    caculate = calculator()    

Answer 1

In general, "this works, but are there other ways to do this?" is not a good format for this site. However, here's a partial answer: classes are for binding state to function, and not for organizing code. (Opinions differ on this, which is one reason this is not a good question format for this site, but this is mine -- for more info on this theory, see Stop Writing Classes .) By and large, there is no utility to using a class to organize your code this way, because the functionality of your program is procedural. If you were to break off all of these methods and turn them into functions, you could probably end up with less complex code that does the same thing.