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Python Object-Oriented Python Advanced Objects Frustration

Posted by Duane Smith
Duane Smith
1,919 Points

So I've kept at this challenge and I don't seem to know what I'm getting wrong. When I test my code in VSCode, it works.

It seems that I'm not seeing something in terms of what the question is specifically looking for. I got help from another user who pointed out some things, but I still wasn't able to bring it together. After tinkering with it after a few days, I came up with this code and it seems to work. When I enter the len function after I create a new instance of my class, It gives me the wrong value, which is what I want. So I don't know what I'm doing wrong.

Any help will be greatly appreciated.

Thank You in Advance,

Duane Smith

frustration.py 
import random
class Liar(list):
    def __init__(self, value, *args, **kwargs):
        super().__len__()
        self.value = random.randint(0, value)

    def __len__(self):
        return self.value

1 Answer

Jennifer Nordell
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STAFF
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Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there, Duane Smith! Way to keep at it! :tada: You're doing great. Part of the problem here is that you don't get to decide what gets passed in upon creating a new instance of Liar() inside the challenge. The Liar() class will only accept one argument and that is of type list.

You do not need to override the __init__. You only need to override the __len__() method here. Part of the inherent problem with returning a random value is that you cannot guarantee that the random number that was rolled does not accidentally match the actual length. For example, if I sent in ['a', 'b', 'c'] then that has a len() that would return 3. But what happens if the random number it rolls is a 3? Then it's not lying :smiley:

I'm expecting something more along the lines of this pseudocode:

class Liar(list):
   def __len__(self):
        # length = call super() then call __len__()
        # return length + 15

Hope this helps! :sparkles:

Duane Smith
Duane Smith
1,919 Points

Jennifer Nordell

Ahh, I see what you mean! I understand where I wasn't grasping the problem before. Thanks a ton, and thanks for not just giving me the answer as well! You gave me a great blueprint and I definitely have an idea of how I'm going to handle this challenge! Just one more learning lesson of many more to come, love it!

Thanks again :)

Duane