Python Class Fraction Numbers

I made a code that makes the user input two fraction numbers in the form 'd/n'. How can I make it print the reduced form of the fraction ? ex: when I type 2/4 it prints 1/2? i

Solution 1:

Use the fractions.Fraction() class and have it do the work for you:

>>>import fractions>>>fractions.Fraction(2, 4)
Fraction(1, 2)

To simplify fractions yourself, calculate the greatest common divisor:

def gcd(a, b):
    while b:
        a, b = b, a%b
    returnag= gcd(numerator, denominator)
numerator //= g
denominator //= g

Solution 2:

    >>> num = 2
    >>> den = 4        
    >>> from fractions import Fraction
    >>> frac = Fraction(num,den).limit_denominator()
    >>> numer = frac.numerator
    >>> denom = frac.denominator
    >>> print'%d/%d ~ %g' % (numer, denom, float(numer)/denom)
    1/2 ~ 0.5

Hope this helps. (link http://docs.python.org/2/library/fractions.html)

Solution 3:

Simply divide the numerator and the denominator to their greatest common divisor before showing the number. That is if you want to use your own class. Otherwise there is a Fraction class in the fractions module.

Solution 4:

Well, first you're going to have to add support to your Rational class that computes the reduced form for a fraction. Basically, what you need to do is add a reduce() method that finds the lowest common denominator of the two numerator, denominator in the Rational. Try looking at Least Common Multiple for an algorithm.

Solution 5:

import fractions

f = fractions.Fraction(5, 10)
print (f) # print1/2