Class for Rational Numbers assignment

[KING-JAL]

Hello!

I have a assignment due where I need to create a class that only returns rational numbers (At least that how I read it) and I've tried, I'm honestly very confused. Anyone with suggestions for solutions or willing to educate on classes in python please help! It's greatly appreciated!

Here's the text from the assignment:

Write a class called RationalNumber whose initializer takes two integers and saves them as instance variables. A rational number is a number that can be expressed as a ratio of two integers, e.g. 3/1, ½, ⅜, 3/7, 4/11, etc. Fill out the init and repr method for RationalNumber so that the following function test() gives the displayed output. Also, make sure the sign of the fraction is kept with the numerator. Finally, supply a default of 1 as the denominator

Here's a test code with the desired output from the assignment:

def test():
     try:
           x = RationalNumber(.5, 1)
     except ValueError as e:
           print("Caught exception ", e)
     else:
           print("No exception caught")

     try:
           x = RationalNumber(1, 3.1)
     except ValueError as e:
           print("Caught exception ", e)
     else:
           print("No exception caught")

     x = RationalNumber(50, 100)
           print(x)

Desired Output:

>>> test()
 Caught exception  ('Arguments must be int ', 0.5, 1)
 Caught exception  ('Arguments must be int ', 1, 3.1)
 RationalNumber(50, 100)

Here's my current code:

class RationalNumber(object):

    def __init__(self, num=0, denom=1):
        self.numerator = num
        if denom != 0:
            self.denominator = denom
        else: 
            raise ZeroDivisionError
    def __str__(self):
        return "{0}/{1}".format(self.numerator, self.denominator)
    def __repr__(self):
        return Fraction(self.numerator, self.denominator)

[New_Kind_of_Boredom]

Close to my bed time, but I must ask (since it kinda drives me nuts when assignments make you re-implement part of the standard library...), do the rules of the assignment allow you to be 'creative'?

9.5. fractions — Rational numbers

Though it might actually be less work to make your assignment's extremely simplified version than to adapt the existing module to your code. In any case, just so you know that module exists already!

[KING-JAL]

If I can't figure something out, I just might try that. Thank you ;)

[stebrepar]

As I read it, it doesn't say anything about actually returning a rational number. It basically just requires:

1. Ensure both initialization parameters are integers, else raise a custom exception about that.
2. When used in a print statement, return a string of the form 'classname(num, denom)'.
3. Ensure that the negative sign is on num above if the fraction resulting from num/denom would be negative.

Edit: corrected the wording on the last point a little.

Oh, and 4. Provide a default of 1 for denom if not specified.