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Python Object-Oriented Python Dice Roller Compare and Contrast

Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points
Posted by Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points

Comparison challenge

Am I missing anything in this challenge?

songs.py 
class Song:
    def __init__(self, artist, title, length):
        self.artist = artist
        self.title = title
        self.length = length
    def __eq__(self,other):
        return int(self.length)==other
    def __lt__(self,other):
        return int(self.length)<other
    def __gt__(self,other):
        return int(self.length)>other
    def __lte__(self,other):
        return int(self.length)<other or int(self.length)==other
    def __gte__(self,other):
        return int(self.length)>other or int(self.length)==other

3 Answers

Steven Parker
Steven Parker
231,198 Points
Steven Parker
Steven Parker
231,198 Points

It looks like you missed the last part of the instructions: "Probably a good idea to be able to convert Songs to ints, too, huh?" I take that as a hint that you may need an "__int__" method.

A few other issues:

  • you won't need to explicitly refer to the "length" property once you have the __int__ method
  • the method names of __lte__ and __gte__ should be __le__ and __ge__
  • you can use the "<=" and ">=" operators to simplify the inequality tests
Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points
Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points

When we add the int method, we’re just returning self.length. I don’t understand how this is converting the value to an integer. Also for the comparison methods, when we put int(self), is this referring to the int method since we’re trying to get self.length?

Steven Parker
Steven Parker
231,198 Points
Steven Parker
Steven Parker
231,198 Points

The length is the value. What the method does is allow the conversion of a Song (which is an object) into an integer value.

pet
pet
10,908 Points
pet
pet
10,908 Points

Quite correct Steven :)

pet
pet
10,908 Points
pet
pet
10,908 Points

Your missing the 

def __int__(self):

above your __ eq __ method.

Other than that you should be good :)

Rutendo Chidewu
Rutendo Chidewu
3,529 Points
Rutendo Chidewu
Rutendo Chidewu
3,529 Points

class Song: def init(self, artist, title, length): self.artist = artist self.title = title self.length = length

def __int__(self):
    return self.length

def __eq__(self, other):
    return int(self) == other

def __gt__(self, other):
    return int(self) > other

def __lt__(self, other):
    return int(self) < other

def __ge__(self, other):
    return int(self) > or int(self) == other

def __le__(self, other):
    return int(self) < or int(self) == other
Rutendo Chidewu
Rutendo Chidewu
3,529 Points

i dont know what im missing

Steven Parker
Steven Parker
231,198 Points
Steven Parker
Steven Parker
231,198 Points

If the answer for Leo isn't what you need, try starting a fresh question of your own.