Write a class named Product that holds data about an item in a retail store. The

Question

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. 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 calls to test the three __ doc __ strings. Test the program to be sure it still works.

Explanation / Answer

# This Product class holds data about products.
class Product:

# __int__ method initializes the attributes.
def __init__(self, description, units, price):
self.__item_description = description
self.__units_in_inventory = units
self.__price = price

# The set_item_description method gets the item type.
def set_item_description(self, description):
self.__item_description = description

# The set_units_in_inventory method gets number of items available.
def set_units_in_inventory(self, units):
self.__units_in_inventory = units

# The set_price method gets the cost of item.
def set_price(self, price):
self.__price = price

# The get_item_description method returns the item type.
def get_item_description(self):
return self.__item_description

# The get_units_in_inventory returns the number of items available.
def get_units_in_inventory(self):
return self.__units_in_inventory

# The get_price method returns the cost of item.
def get_price(self):
return self.__price

# This program will test the Product class and return information
# using the mutator method.

import sys

# This defines the main function.
def main():
# Get a list of Product objects.
inventory = make_list()

# Display the data in the list.
print('Here is the data you entered:')
list_display(inventory)

# The make_list will get data for three items. It will
#return a list of available items.

def make_list():
# Create an empty list.
item_list = []

# Add three item to the list.
print('Enter data for three items.')
for count in range(1, 4):
# Get item data.
print('Item number ' + str(count) + ':')
item = input('Enter description of item: ')
units = float(input('Enter number of units in inventory: '))
price = float(input('Enter price per item: '))
print()

# Creat new Product and assign items variable.
items = Product(item, units, price)
# Add items to list.
item_list.append(items)

return item_list

#Display the items information.
def display_list(item_list):
for item in item_list:
print(item.get_item_description())
print(item.get_units_in_inventory())
print(item.get_price())
print()

# Call the main function.
main()

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