Getting an attribute error when working with function in Python

Question

I browsed through several similar questions on here before I decided to ask. There were similar questions about the same error, but they weren't the same type of problem, and none of the answers resolved my problem.

Nonetheless, I'm getting a Typeerror which says 'function' object has no attribute 'getitem'. Here is my code:

def Rectangle(width, height):
  area = Rectangle[width] * Rectangle[height]

a = Rectangle(5, 7)
print(a.area)

Now I know there are easier ways to do this, but the challenge is to do it using functions and classes. I'm wondering where I'm going wrong with this?

I think you want a class, not a function

inspectorG4dget
– inspectorG4dget

2014-10-31 21:08:45 +00:00
Commented Oct 31, 2014 at 21:08 — inspectorG4dget
– inspectorG4dget, Commented Oct 31, 2014 at 21:08

anon582847382 · Accepted Answer · 2014-10-31 21:09:57Z

1

You need to create a class. I'll get you started:

class Rectangle:
    def __init__(self, width, height):
        self.width = width
        self.height = height

    @property
    def area(self):
        return self.width * self.height

What you currently have is a function. But seeing as each instance of your object should have it's own attributes, you need to create a type to store them.

answered Oct 31, 2014 at 21:09

anon582847382

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3 Comments

Hunter Watkins Over a year ago

That makes sense. Thank you. What does the atproperty do?

anon582847382 Over a year ago

@HunterWatkins Seeing as area is calculated depending on width and height, we don't want to have it as a constant value. The @property allows us to access it as normal while still keeping it proportional to its other attributes.

Hunter Watkins Over a year ago

Wow, that's useful! Thanks so much. I literally had the first 2 lines of your code written before I posted this, because I figured I had to use a class, but I swore I could do it with just a function. But I was wrong. Thanks again for your help! @AlexThornton

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