eclipse - Eclipse - オブジェクトに属性がありません。属性エラー

Question

main() で属性エラーが発生しています。誰かが私を助けてくれますか？これは私のクラスです：

インポート数学

クラス Cylinder2():

    def __init__(self, cylRadius = 1, cylHeight = 1):
        self.__radius = cylRadius
        self.__height = cylHeight
    def getPerimeter(self):
        return (2 * math.pi * self.__radius)
    def getEndArea(self):
        return (math.pi * (self.__radius ** 2))
    def getSideArea(self):
        return (2 * (math.pi * (self.__radius * (self.__height))))
    def getSurfaceArea(self):
        return (2 * (math.pi * (self.__radius) * (self.__height + self.__radius)))
    def getVolume(self):
        return (math.pi * (self.__radius ** 2) * self.__height)
    def setRadius(self, r):
        self.__radius = r
    def setHeight(self, h):
        self.__height = h
    def getRadius(self):
        return self.__radius
    def getHeight(self):
        return self.__height

これは main() です:

CylinderModule2 インポートから *

デフメイン（）：

    bottle = Cylinder2(4, 8)

    bottle.setRadius(2)   
    bottle.setHeight(4)
    print("The radius and height of the bottle are: ", bottle.__radius, " and ", bottle.__height)
    print("The perimeter of the bottle end circle is", ("%.2f" % bottle.getPerimeter()))
    print("The end circle area of the bottle is ", ("%.2f" % bottle.getEndArea()))
    print("The side area of the bottle is ", ("%.2f" % bottle.getSideArea()))
    print("The total surface of the bottle is ", ("%.2f" % bottle.getSurfaceArea()))
    print("The volume of the bottle is ", ("%.2f" % bottle.getVolume()))

主要（）

これは私が得るエラーです: print("The radius and height of the bottle are: ", bottle._ radius, " and ", bottle. _height) AttributeError: 'Cylinder2' object has no attribute '__radius'