__init __()取1到3个位置参数,但给出了4个

时间:2013-11-26 05:47:16

标签: python

class GeometricObject:
    def __init__(self,color = 'green',filled='true'):
        self.__color=color
        self.__filled=filled
    def getColor(self):
        return self.__color
    def setColor(self,color):
        self.__color=color
    def isFilled(self):
        return self.__filled
    def setFilled(self,filled):
        self.__filled=filled
    def __str__(self):
        return "Color: " + self.__color + " Filled: " + str(self.__filled)

这是Triangle课程:

   from GeometricObject import GeometricObject

   class Triangle(GeometricObject):
       def __int__(self,side1=1.0,side2=1.0,side3=1.0):
           super().__init__()
           self.__side1=side1
           self.__side2=side2
           self.__side3=side3

       def getPerimeter(self):
           return self.__side1 + self.__side2 + self.__side3

       def __str__(self):
           return super().__str__()+" side 1: "+str(self.__side1)+" side 2: "+str(self.__side2)+" side 3: "+str(self.__side3) 

       from triangle import Triangle
       from GeometricObject import GeometricObject

       def main():
           side1=int(input("Enter first side: "))
           side2=int(input("Enter second side: "))
           side3=int(input("Enter third side: "))
           t1=Triangle(side1,side2,side3)
           print(t1.getColor())
           print(t1.getPerimeter())
           print(t1.__str__())
       main()

在main函数中创建三角形对象t1时发生错误: init ()需要1到3个位置参数,但是给出了4个...

我知道还有其他关于类似错误的帖子,但是如果你提供的参数不够多,那么提供太多参数的那些就没有回答我的问题。

2 个答案:

答案 0 :(得分:4)

您需要将__int__更改为__init__,并且只能通过super() self

class Triangle(GeometricObject):
       def __init__(self,side1=1.0,side2=1.0,side3=1.0):
           #The correct alternative to below is: 
           #super(GeometricObject, self).__init__()

           GeometricObject.__init__(self) 
           self.__side1=side1
           self.__side2=side2
           self.__side3=side3

要回答你的第二个问题,这是一个例子:

class A(object):
    def __init__(self, color = 'blue'):
        self.color = color

    def __str__(self):
        return str(self.color)

class B(A):
    def __init__(self, name = 'steve'):
        A.__init__(self)    
        self.name = name

    def __str__(self):
        #alternatively: return super(B, self).__str__() + " " + str(self.name) 
        return A.__str__(self) + " " + str(self.name)

打印"blue steve"

答案 1 :(得分:1)

Triangle的 init 函数拼写错误为__int__
def __int__(self,side1=1.0,side2=1.0,side3=1.0):

更改为:
def __init__(self,side1=1.0,side2=1.0,side3=1.0):

适合我!