Question

Instructions

Modify the Product class from the Practice Exercise 7 by adding a quantity member. Include a getter and setter, using decorators, and modify the appropriate constructor to also accept a quantity parameter.

Then modify the inventory.py file from the practice exercise to include quantity values in the constructor calls with a quantity of 100 for product1 (hammers) and 3000 for product2 (nails). Add print statements to display the quantity values as shown in the Expected Output included below.

Submission

Attach and submit your modified product.py and inventory.py files to this assignment.

Expected Output (new output shown in red, yours does not have to be red).

PRODUCT 1:
Name:                 Stanley 13 Ounce Wood Hammer
Price:                11.25
Discount percent:     62%
Discount amount:      6.97
Discount price:       4.28
Quantity:             100 

PRODUCT 2:
Name:                 National Hardware 3/4" Wire Nails
Price:                5.06
Discount percent:     0%
Discount amount:      0.00
Discount price:       5.06
Quantity:             3000

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Answer 1

product class

class product(object):#main class you can inherit it from object if you wish else its work fine.
    Name='' #declraing all the variable of product
    Price=0
    Discount_percent=0
    Discount_amount=0
    Discount_price=0
    Quantity=0
  
    def __init__(self,a,b,c,d): # constructor with name, price,discount amount and quantity
        self.Name=a #asign respective value
        self.Price=b
        self.Discount_percent=c
        self.Discount_amount=b*(c/100)# asign value after calculating discount price
        self.Discount_price=b-b*(c/100)
        self.Quantity=d
    def print_product(self):# this function help to print detail o product
        # you can print all variable of this class by self.variablename but this will help you lot and give same output with 1 line
        print(self.__dict__)# __dict__ is called magic method in python which print all the variable of the class
      
    @property # getter method for quantity @property is called decorator for setter method
    def quantity(self):
        return self.Quantity
  
    @quantity.setter # you have to asign decorator name with name of method asign for getter method and then word setter
    def quantity(self, a):
        self.Quantity = a
# creating object of product
product1=product('Stanley 13 Ounce Wood Hammer',11.25,62,100)
product1.print_product()#printing all values of product one
print('quantity is :',product1.Quantity)# calling getter method it will allow us to access quantity variable without function
#asign new quantity
product1.Quantity=200
print('after setting quantity 200 :',product1.Quantity)

output:--

2nd class

code:--

class inventory(product):
    def __init__(self,obj,quantity):# constructor for inventory.it will accept object and quantity
        obj.Quantity=quantity# asign quantity using inventory object
i1=inventory(product1,100) # creating object for testing
product1.print_product()# asign again 100 quantity to product 1

output:-

NOTE: --

i defind both class on your requirment given but in question i don't know what those class contain earliar so i make it as best.if you have any question let us know.