Equals support for self-built Fraction class

Question

class Fraction:
    """Class for performing fraction arithmetic.
    Each Fraction has two attributes: a numerator, n and a deconominator, d.
    Both must be integer and the deonominator cannot be zero."""

    def __init__(self,n,d):
        """Performs error checking and standardises to ensure denominator is 
positive"""
        if type(n)!=int or type(d)!=int:
            raise TypeError("n and d must be integers")
        if d==0:
            raise ValueError("d must be positive")
        elif d<0:
            self.n = -n
            self.d = -d
        else:
            self.n = n
            self.d = d

    def __str__(self):
        """Gives string representation of Fraction (so we can use print)"""
        return(str(self.n) + "/" + str(self.d))

    def __add__(self, otherFrac):
        """Produces new Fraction for the sum of two Fractions"""
        newN = self.n*otherFrac.d + self.d*otherFrac.n
        newD = self.d*otherFrac.d
        newFrac = Fraction(newN, newD)
        return(newFrac)

    def __sub__(self, otherFrac):
        """Produces new Fraction for the difference between two Fractions"""        
        newN = self.n*otherFrac.d - self.d*otherFrac.n
        newD = self.d*otherFrac.d
        newFrac = Fraction(newN, newD)
        return(newFrac)

    def __mul__(self, otherFrac):
        """Produces new Fraction for the product of two Fractions"""        
        newN = self.n*otherFrac.n
        newD = self.d*otherFrac.d
        newFrac = Fraction(newN, newD)
        return(newFrac)

    def __truediv__(self, otherFrac):
        """Produces new Fraction for the quotient of two Fractions"""        
        newN = self.n*otherFrac.d
        newD = self.d*otherFrac.n
        newFrac = Fraction(newN, newD)
        return(newFrac)

As code showed above, how can I print

Fraction(1,3) == Fraction(2,6)

As example:

Fraction(1,2) + Fraction(1,3)
Fraction(1,2) - Fraction(1,3)
Fraction(1,2) * Fraction(1,3)
Fraction(1,2) / Fraction(1,3)

They are all work for calculation every time. And when I try to print fraction(1,3) == fraction(2,6), it come out as False. How can I let it calculate as True?

How can I do it without using import fraction.

Answer 1

Try this:

def __eq__(self, other):
    return  self.n*other.d == self.d*other.n

As pointed out in the comments, there is no need to implement the __ne__.

EDIT: As requested in the comments to this answer, here is a method for simplifying fractions.

The simplification of fraction implies dividing both numbers by the greatest common divisor. As posted in here the code is rather simple

# return the simplified version of a fraction
def simplified(self):
    # calculate the greatest common divisor
    a = self.n
    b = self.d
    while b:
        a, b = b, a%b
    # a is the gcd
    return Fraction(self.n/a, self.d/a)

I hope it helps.