oop.py

# -*- coding: utf-8 -*-
"""OOP.ipynb

Automatically generated by Colaboratory.

Original file is located at
    https://colab.research.google.com/drive/
"""

# Fraction Class

class Fraction:
    
    def __init__(self, numerator, denominator):
        self.__numerator = numerator
        self.__denominator = denominator

    def __str__(self):
        return str(self.__numerator) + '/' + str(self.__denominator)

    def __repr__(self):
        return str(self.__numerator) + '/' + str(self.__denominator)

    def getNumerator(self):
        return self.__numerator

    def getDenominator(self):        
        return self.__denominator

    def get(self):
        return (self.getNumerator(), self.getDenominator())

    def setNumerator(self, value):
        self.__numerator = value

    def setDenominator(self, value):
        if value == 0:
            raise ValueError('Divide by Zero Error')
        
        self.__denominator = value

    def set(self, numer, denom):
        self.setNumerator(numer)
        self.setDenominator(denom)

    def reduce(self):
        gcd = self.__calcGCD()
        self.__numerator = self.__numerator // gcd
        self.__denominator = self.__denominator // gcd

    def __calcGCD(self):
        a = max(abs(self.__numerator), abs(self.__denominator))
        b = min(abs(self.__numerator), abs(self.__denominator))
        
        while b != 0:
            temp = b
            b = a % b
            a = temp
            
        return a

    def __adjust(self, factor):
        self.setNumerator(self.getNumerator() * factor)
        self.setDenominator(self.getDenominator() * factor)

    def copy(self):
        new_frac = Fraction(self.__numerator, self.__denominator)
        return new_frac

    def __neg__(self):
        return Fraction(-self.__numerator, self.__denominator)

    def __add__(self, rfraction):       
        numer = self.__numerator * rfraction.getDenominator() + \
                rfraction.getNumerator() * self.__denominator

        denom = self.__denominator * rfraction.getDenominator()

        resultFrac = Fraction(numer, denom)
        resultFrac.reduce()

        return resultFrac

    def __sub__(self, rfraction):

        return self + (-rfraction)

    def __mul__(self, rfraction):
        numer = self.__numerator * rfraction.getNumerator()
        denom = self.__denominator * rfraction.getDenominator()

        resultFrac = Fraction(numer, denom)
        resultFrac.reduce()

        return resultFrac

    def __eq__(self, rfraction):
        temp_frac1 = self.copy()
        temp_frac2 = rfraction.copy()
        temp_frac1.reduce()
        temp_frac2.reduce()

        if temp_frac1.getNumerator() == temp_frac2.getNumerator() and \
           temp_frac1.getDenominator() == temp_frac2.getDenominator():
            return True
        else:
            return False

    def __neq__(self, rfraction):
        return not self.__eq__(rfraction)

    def __lt__(self, rfraction):
        lessthan = False
        
        temp_frac1 = self.copy()
        temp_frac2 = rfraction.copy()

        temp_frac1.__adjust(temp_frac2.getDenominator())
        temp_frac2.__adjust(temp_frac1.getDenominator())

        if temp_frac1.getNumerator() < temp_frac2.getNumerator():
            lessthan = True

        return lessthan

    def __le__(self, rfraction):
        if self == rfraction or self < rfraction:
            return True
        else:
            return False
        
    def __gt__(self, rfraction):        
        if not(self <= rfraction):
            return True
        else:
            return False

    def __ge__(self, rfraction):
        if not(self < rfraction):
            return True
        else:
            return False

#Write the code that use every built-in function of fraction at least once.

frac1 = Fraction(3,4)
frac2 = Fraction(5,7)
print(frac1, frac2)   #__str__

print(frac1.get())    #getNumerator, getDenominator, get

frac2.set(5,15)       #setNumberator, setDenominator, set

frac2.reduce()        #reduce, __calcGCD
print(frac2)

print(-frac1)         #__neg__ 
print(frac1+frac2)    #__add__
print(frac1-frac2)    #__sub__
print(frac1*frac2)    #__mul__

print(frac1==frac2)   #__eq__, copy
print(frac1!=frac2)   #__neq__
print(frac1<frac2)    #__lt__, __adjust
print(frac1<=frac2)   #__le__
print(frac1>frac2)    #__gt__
print(frac1>=frac2)   #__ge__

frac1, frac2          #__repr__