computing using tuples

computing.py

# consider a shopping list which contains various objects with quantity and cost and this items are stored in a list as tuples with their description and we want to find the total cost with discount

from collections import namedtuple

grocery = namedtuple('grocery',['item_name','item_weight','item_cost',
                                'item_quantity','item_dicsount'])

shopping_list_tuples = [('apples',2.3,128,7,13.6),('chicken',1,228,2,110),
                        ('milk',0.6,18,2,0),('lemons',0.3,45,20,50)]



def total_cost_tuples(shopping_list):
    total = 0
    for val in shopping_list:
        # here we are multiplying cost with number and subtracting it by discount
        total += val[2] * val[3] - val[4]
    return total
print(total_cost_tuples(shopping_list_tuples))

# Output: 2114.4



def total_cost_named_tuples(shopping_list):
    total = 0
    for val in shopping_list:
        # here we are multiplying cost with number and subtracting 
        it by discount
        g = grocery(*val)
        total += g.item_cost * g.item_quantity - g.item_dicsount 
    return total
print(total_cost_named_tuples(shopping_list_tuples))

# Output: 2114.4