Polymorphism: Adding new attribute (Python)

Question

I'm still studying polymorphism in python. I tried to add color attribute based on this code, but I failed. Here is my code:

class Shape:
    width = 0
    height = 0
    color = 0
 
    def area(self):
        print('Parent class Area ... ')
    
    def get_color(self):
        print('Parent class Color ...')
 
 
class Rectangle(Shape):
 
    def __init__(self, w, h, c):
        self.width = w
        self.height = h
        self.color = c
 
    def area(self):
        print('Area of the Rectangle is : ', self.width*self.height)
    
    def get_color(self):
        print('Color of Rectangle: ', self.color)
 

class Triangle(Shape):
 
    def __init__(self, w, h, c):
        self.width = w
        self.height = h
        self.color = c
 
    def area(self):
        print('Color of Rectangle: ', self.color)
        print('Area of the Triangle is : ', (self.width*self.height)/2)

    def color(self):
        print('Color of Triangle: ', self.color)

Result:

TypeError: 'str' object is not callable

I'm still newbie in this part. Thank you for your helps before ;)

you are not showing which statement raises the TypeErros.. but I suspect this: your classes cannot have variables and methods with the same name, for example `color´ — vaizki
– vaizki, Commented Dec 9, 2021 at 10:07

Behdad Abdollahi Moghadam · Accepted Answer · 2021-12-09 10:08:48Z

2

In your Triangle class, you have a method named color and also a property named color.
Change the color method to get_color it will resolve your problem.

 def get_color(self):
        print('Color of Triangle: ', self.color)

The python thinks you are calling the property named color which is a string and it cannot be called.

answered Dec 9, 2021 at 10:08

Behdad Abdollahi Moghadam

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