Question

我是python的新手，我正在尝试创建一个基本的python计算器

#!/usr/bin/env python

class Calculator:
    def __int__(self,x,y):
        self.x = x
        self.y = y
    def add(self):
        return self.x + self.y
    def sub(self):
        return self.x - self.y
    def multi(self):
        return self.x * self.y
    def div(self):
        return self.x / self.y

    def convert(self,a,b):
        try:
            int_a = int(a)
            int_b = int(b)
        except ValueError:
            int_a = float(a)
            int_b = float(b)
        return int_a,int_b

run = True

while run:
    print "Please choose what you'd like to do:"
    print "0: Addition"
    print "1: Subtraction"
    print "2: Multiplication"
    print "3: Division"
    print "4: Quit Application"

    choice = raw_input()

    if choice == "0":
        str_a = raw_input("Enter 1st number : ")
        str_b = raw_input("Enter 2nd number : ")
        c = Calculator(str_a,str_b)
        c.add()

但我收到如下错误：

  c = Calculator(str_a,str_b)
TypeError: this constructor takes no arguments

请有人帮我解决这个问题

Answer 1

这是我期待你需要的解决方案，

#!/usr/bin/env python

    class Calculator:
        def __init__(self,x,y):
            self.x = int(x)
            self.y = int(y)
        def add(self):
            return self.x + self.y
        def sub(self):
            return self.x - self.y
        def multi(self):
            return self.x * self.y
        def div(self):
            return self.x / self.y

        def convert(self,a,b):
            try:
                int_a = int(a)
                int_b = int(b)
            except ValueError:
                int_a = float(a)
                int_b = float(b)
            return int_a,int_b

    run = True

    while run:
        print "Please choose what you'd like to do:"
        print "0: Addition"
        print "1: Subtraction"
        print "2: Multiplication"
        print "3: Division"
        print "4: Quit Application"

        choice = raw_input()

        if choice == "0":
            str_a = raw_input("Enter 1st number : ")
            str_b = raw_input("Enter 2nd number : ")
            c = Calculator(str_a,str_b)
            print c.add()

Answer 2

请使用input代替raw_input

   str_a = input("Enter 1st number : ")
   str_b = input("Enter 2nd number : ")

raw_input默认采用字符串。

TypeError：此构造函数不带参数

2 个答案: