Using Python 3.4.3 For this assignment you are to create a Merchandise data clas

Question

Using Python 3.4.3

For this assignment you are to create a Merchandise data class and, in a separate file, an executable program named program101.py to test it. Refer to the UML diagram below to create the Merchandise class. See page 462-463 regarding UML diagrams.

__item
__quantity
__cost

__init__(item,quantity,cost)
set_item(item)
set_quantity(quantity)
set_cost(cost)
get_item()
get_quantity()
get_cost()
get_inventory_value()
__str__()

NOTE: the get_inventory_value() method calculates and prints the value of the merchandise item in currency format.
NOTE: the __str()__ method (see page 437-440) returns a string showing all 3 attributes and the inventory value (quantity * cost).

In the program101.py main function:

create a Merchandise instance for 10 hammers costing $14.95 each.

create another Merchandise object for 6 necklaces costing $799.99 each.

run the __str__ methods of both objects.

prompt the user for a new quantity for the hammer object, then change this attribute with the setter method.

prompt the user for a new cost for the necklace object, then change this attribute with the setter method.

verify the changes by running the __str__ methods again.

display the inventory value for each object as well.

SAMPLE OUTPUT

hammer, 10 @ $14.95
necklace, 6 @ $799.99
Enter new quantity for hardware 12
Enter new cost for jewelry 659
hammer, 12 @ $14.95
Inventory value: $179.40
necklace, 6 @ $659.00
Inventory value: $3,954.00

__item
__quantity
__cost

__init__(item,quantity,cost)
set_item(item)
set_quantity(quantity)
set_cost(cost)
get_item()
get_quantity()
get_cost()
get_inventory_value()
__str__()

Explanation / Answer

##program101.py

class MerchandiseProg:
    def __init__(self11,item,qty,cost):
        self11.__item = item
        self11.__qty = qty
        self11.__cost = cost

    def set_item(self11,item):
        self11.__item = item

    def set_quantity(self11,qty):
        self11.__qty = qty

    def set_cost(self11,cost):
        self11.__cost = cost

    def get_item(self11):
        return self11.__item

    def get_quantity(self11):
        return self11.__qty

    def get_cost(self11):
        return self11.__cost

    def __str__(self11):
        s = self11.__item + ' ' + str(self11.__qty)
        s += ' @ ' + str(self11.__cost)
        return s

### import a merchandiseProg module
import merchandiseProg

def main():
  
    storevalmerchandise = merchandiseProg.MerchandiseProg('hammer',10,14.95)
    print(storevalmerchandise)

    storevalmerchandise.set_item('necklaces')
    storevalmerchandise.set_quantity(6)
    storevalmerchandise.set_cost(799.99)
    print(storevalmerchandise)

    item2 = input('Enter a new quantity for the hardware ')
    storevalmerchandise.set_item('hammer')
    storevalmerchandise.set_quantity(item2)
    storevalmerchandise.set_cost(14.95)
    print(storevalmerchandise)

    necklace2 = input('Enter the new cost for a necklaces ')
    storevalmerchandise.set_item('necklace')
    storevalmerchandise.set_quantity(necklace2)
    storevalmerchandise.set_cost(659.00)
    print(storevalmerchandise)
    print(storevalmerchandise + format(storevalmerchandise.get_cost(), ',.2f'), sep='')

main()

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