Override operator in Python class

[muadong200474]

class Expense:
    def __init__(self, name, cost):
        self.name = name
        self.cost = cost
        
    def get_cost(self):
        return self.cost
    
    # override '+' operator
    def __add__(self, other):
        return self.cost + other.cost
    
food = Expense("food", 100)
fuel = Expense("fuel", 50)

print(food + fuel) # output: 150