CODEWITHSUNDEEP
eclipse
TJay
TJay

Reputation: 1

Eclipse - Object has no attribute. AttributeError

I am getting an Attribute error on the main(). Can someone please help me out? This is my class:

import math

class 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

This is the main():

from CylinderModule2 import *

def main():

    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()))

main()

This is the error I get: print("The radius and height of the bottle are: ", bottle._radius, " and ", bottle._height) AttributeError: 'Cylinder2' object has no attribute '__radius'

Upvotes: 0

Views: 165

Answers (1)

awaigand
awaigand

Reputation: 179

bottle.__radius and bottle.__height are what can loosely be described as private variables (even though they are not really, you can read about what I mean here: http://docs.python.org/2/tutorial/classes.html#private-variables-and-class-local-references ) "private" variables can not be directly accessed from outside of the class. In Python, they are denoted by using two underscores (as in __radius).

So what you want to do is using the getters, which are bottle.getRadius() and bottle.getHeight() instead.

Upvotes: 1

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