Question

* Python *

* Python Programming *

Part 1: Product Class

Write a class named Product that holds data about an item in a retail store.   The class should store the following data in attributes: product id, item description, units in inventory, and price. Write the __init__ method to require all four attributes. Also write a __str__ method for debugging output.   

Once you have written the class, write a main() function that creates three Product objects and stores the following data in them. Use the __str__ method to confirm the data is stored properly.

ID         Description              Quantity        Price
1          Jacket                          12                    59.95
2          Designer Jeans            40                    34.95
3          Shirt                             20                    24.95

Submit your python file (.py) to Sakai

Part 2: Inventory Module

Create an Inventory module by moving the Product Class definition to another file called inventory.py.   Add three __doc__ strings: one that describe the inventory module (include your name and the date here), one that describes the Product class, and one that describes the Product class __init__ method.

Rename your main() function to test_inventory.py
Add an import at the top of the file to read the Product class definition.
Add these print statements to test the __doc__ string:

Print(inventory.__doc__)

Print(Product.__doc__)

Print(Product.__init__..__doc__)

Test the program to be sure it still works. NOTE: If using IDLE, you will have to explicitly save the inventory.py file after making changes.  

Answer 1

Part1

product.py

class Product(object):
    def __init__(self, product_id, item_desc, units, price):
        self.product_id = product_id
        self.item_desc = item_desc
        self.units = units
        self.price = price

    def __str__(self):
        return 'Product ID: %s, Itesm: %s, Units: %d, price: %.2f' %(self.product_id, self.item_desc, self.units, self.price)


def main():
    p1 = Product('1', 'Jacket', 12, 59.95)
    p2 = Product('2', 'Designer Jeans', 40, 34.95)
    p3 = Product(3, 'Shirt', 20, 24.95)
    print(p1)
    print(p2)
    print(p3)

main()

# OUT

part 2 NOTE: update your name in below place holder

inventory.py

"""
Name: <PLACE YOUR NAME>
DAte: 18-09-2019
"""


class Product(object):
    """
    prodcut class
    representataion of product that have id, name units and price
    """

    def __init__(self, product_id, item_desc, units, price):
        """
        constructor of product class
        :param product_id:  id of the product
        :param item_desc: item detail
        :param units: no of units
        :param price: price per unit
        """
        self.product_id = product_id
        self.item_desc = item_desc
        self.units = units
        self.price = price

    def __str__(self):
        return 'Product ID: %s, Itesm: %s, Units: %d, price: %.2f' % (
            self.product_id, self.item_desc, self.units, self.price)

test_inventory.py

import inventory  # importing inventory
Product = inventory.Product


def main():
    # printing doc
    print(inventory.__doc__)
    print(Product.__doc__)
    print(Product.__init__.__doc__)

    # creating and printing product
    p1 = Product('1', 'Jacket', 12, 59.95)
    p2 = Product('2', 'Designer Jeans', 40, 34.95)
    p3 = Product(3, 'Shirt', 20, 24.95)
    print(p1)
    print(p2)
    print(p3)


main()

# OUT