aBN108 Programming for Networking Page | 11 Assessment Details and Submission Guidelines Trimester...

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aBN108	Programming for Networking	Page | 11 	Assessment Details and Submission Guidelines 	Trimester 	T1 2021 	Unit Code 	BN108 	Unit Title 	Programming for Networking 	Assessment Type 	Individual 	Assessment Title 	Assignment 2 - Programming for a Vending Machine 	Purpose of the assessment (with ULO Mapping) 	This assignment assesses the basic concepts of programming; students should be able to demonstrate their achievements in the following unit learning outcomes: a. Describe the fundamental principles of object-oriented programming; b. Interpret a user’s needs while dealing with simple program specifications; c. Design a simple class using UML notation; d. Create a simple application based on UML design and the incremental development process of coding, debugging, and testing; e. Apply basic control structures – sequence, repetition, and selection – to program development; f. Produce simple interactive applications. 	Weight 	35%  	Total Marks 	80 marks 	Word limit 	Not applicable 	Due Date 	Week 11 (3/06/2021) 	Submission Guidelines 	· All work must be submitted on Moodle by the due date along with a completed Assignment Cover Page.  · The assignment must be in MS Word format, 1.5 spacing, 11-pt Calibri (Body) font and 2 cm margins on all four sides of your page with appropriate section headings.   · Reference sources must be cited in the text of the report, and listed appropriately at the end in a reference list using IEEE referencing style. 	Extension 	If an extension of time to submit work is required, a Special Consideration Application must be submitted directly on AMS. You must submit this application three working days prior to the due date of the assignment. Further information is available at:  https://www.mit.edu.au/about-us/governance/institute-rules-policies-and-plans/policies-procedures-and-guidelines/assessment-policy  	Academic Misconduct   	Academic Misconduct is a serious offence. Depending on the seriousness of the case, penalties can vary from a written warning or zero marks to exclusion from the course or rescinding the degree. Students should make themselves familiar with the full policy and procedure	available at:  http://www.mit.edu.au/about-mit/institute-publications/policies-procedures-and-guidelines/Plagiarism-Academic-Misconduct-Policy-Procedure.  For further information, please refer to the Academic Integrity Section in your Unit Description  Assignment 2 Title: Programming for a Vending Machine Assignment Description: This assignment will give you practice with interactive programs, if/else statements, list and classes. You are required to submit a report as mentioned in the marking guide. Also, a 5 min demonstration recording must be submitted with the required files: 1. Python scripts, 2. Report, 3. 5 Min demo video. Problem Description MIT has decided to create a new vending machine. The machine needs to be programmed in Python for its embedded system. This vending machine application must keep records of items in stock. Details of each item shall include "Item ID","Price","Quantity","Item Name". Figure 1: An overview of the Vending Machine and its contents’ description Task Requirements Imagine you have been invited to develop a menu driven Python application to manage records of items in stock of the vending machine. Based on the problem description, starter program (code template) has been provided. Investigate the provided starter program.  There are 3 scripts (applicationRun.py, userFunctions.py, contents.py). Program is executed by loading and running the applicationRun.py.  Driver function (main) is defined in the appliction.py, which imports userFunctions module (userFunctions.py). userFunctions module (userFunctions.py ) declares all the core functions (display, buy, search, etc) for supporting the Vending Machine. The userFunctions module imports contents module (contents.py). Note: most of these functions, although declared and wired up in the program are not yet implemented. Your task is to implement these functions.  There are five (5) tasks to be completed which are described next within the modules: 1. Design:  Three main parts of the program perform the following tasks: · Authenticate login. · Display Vending machine contents · Allow purchase a. The first part of the program, which authenticates User ID from Database, is a loop. Design the program algorithm for the first part with the help of pseudocode. b. The third part of the program takes user input for the item user wishes to purchase. If the item is not in the VM, user must be notified to try again. If the item is present in the VM, then item must be sold by quoting the item price. Once the item price is completely paid, then the quantity present in the VM must be reduced by 1. Analyse the third part and structure a Flow Chart for this process. c. Design a simple VendingMachine class using UML notation. 2. Implementation: Module: applicationRun.py · Task 1:  implement menu for the user to login() by entering their id Check if the user is authentic.  a. If the ID does not match to the Data Base in db.txt file, prompt ‘invalid id’ and request input again b. Else , show them menu for students Module: userFunctions.py · Task 2: implement load_vm(): Initializse VM with some items. · Task 3: Display contents of the Vending Machine. · Task 4:  Implement buy_item() Take input from the user for itemID. E.g. User input: A2 has 3 items in the stock with the price $2.  You should confirm if the itemID is present. ItemID is the ID for a slot in the machine. Refer to Figure 2. Slot for water bottles is identified by itemID: A2. Figure 2: A sample vending machine with slot for ItemID: A2 Display itemPrice to be paid by the user. Implement calculate(price). a. If the paid amount is equal to item price, display “Successful” on the screen. b. If the paid amount is more than the remaining item price, calculate change and display the message: “Your change is: $xyz” c. If the paid amount is less than the item price, display the balance which needs to be paid.  Remove the item from the list of items- item has been sold. (Hint-  the quantity will  reduce by 1.) buyObject.quantity - = 1 Module: contents.py · Task 5:  Complete the class VendingMachine (itemID, itemPrice, itemName, quantity).  ·  Description of Program functions and Testing: Program asks user to login and displays a corresponding menu on execution. For students, 3 menu options are available to allow the student to buy, display, and exit program.  Program functionality and screen output for each of the menu option upon selection by the user are shown: Program menu on execution: User is a student (menu for student): user enters s123 Option S1 (buy an item A1): User enters 1.  Option S2 (Display): User enters 2. Note that 1 item from A1 has been bought. The quantity is reduced by 1. Option S1 (Buy when the quantity is 0): User enters 1	 Option S3 (Exit Program): User enters  3 Marking criteria:   Marking criteria is shown in following table. Marks are allocated as follows: 	Description of criteria 	Max marks 	Marks obtained 	Design (30 marks) 	 	 	Pseudocode 	10 	 	FlowChart 	10 	 	UML 	10 	 	 	 	 	Implementation of Python functions (30 marks) 	 	 	Task 1:  Login :  design and functionality 	5 	 	Task 2: Load VM with one more itemID:  design and functionality 	5 	 	Task 3:  Display VM contents: design and functionality 	5 	 	Task 4:  Buy item:  design and functionality 	5 	 	Task 5:  Class VirtualMachine:  design and functionality 	5 	 	DEMO (5 min zoom recorded Video demonstration) 	5 	 	 	 	 	Report (10 marks) 	 	 	Program overview 	2 	 	Screen shots of the program Testing output  	5 	 	Paste code into report 	3 	 	 	 	 	Others (10 marks) 	 	 	Use comments, whitespace/layout properly to make program more readable 	2 	 	Demonstration 5 min video 	8 	 	 	 	 	Total 	80 	 	Total 	35% 	 Marking Rubric for Assignment #: Total Marks 80 	Grade Mark 	HD 64-80 	D 56-63 	CR 48-55 	P 40-47 	Fail

Joice G · Accepted Answer

REPORT
Aim:
To develop a Python application for Vending Machine with details about the item (item id, item name), its quantity and price per unit.
Implementation:
The proposed vending machine has user defined functions for loading the items and displaying, listing the items and buying them. The details of each function are given below.
load_vm(): This function is used for loading the Vending machine. The vending machine shows the items present in it through this function. In this function, the details of the items present in the Vending machine is fetched from the MongoDB database and is shown in the Python console using Pandas package.  A snapshot of the same is given below.
After this function is executed the user is prompted to enter his/her MIT ID.
login():  This function is used to authenticate the user. Here the details of the user are stored in the MongoDB collection titled “login”. Once the user enters his MIT ID, it checks whether such an ID is there in the database. If the ID is present, the user is allowed to use the Vending machine (Please refer the below figure).
 
Options are then provided to the user to buy or list the items in the vending machine as shown in the figure above. 
If the user is not present in the database, a prompt showing an “Invalid login” is displayed as shown in the figure below. Further, the program stops executing 
buy(): This function is used for buying the items displayed in the Vending machine. For buying the items, the user has to enter the item id of the item chosen.
Once, the item id is entered, the cost of the product chosen is displayed to the user. Once, the user delivers the amount, the product is delivered and the new updated contents of the Vending machine is shown to the user(Refer the figure below). 
If the entered amount is more than the cost of the product, the change is calculated and delivered to the user. Further, the updated contents are displayed/
If the entered amount is less than the cost of the product, the user is prompted to pay the balance amount. 
Once the amount is entered, the updated contents of the vending machine is shown
list_vm(): This functionality is the same as the load_vm(). Here the contents of the vending machine are listed.
Quit_vm(): This functionality is used to quit the vending machine. Once this function executes, the user is terminated and the contents of the vending machine are displayed.
Result:
The proposed Vending machine application is created in Python.
Codes:
Two files are created.
1. applicationRun.py
2. userFunctions.py
applicationRun.py
# -*- coding: utf-8 -*-
"""
Created on:
@author:

BN108Programming for NetworkingPage | 11 Assessment Details and Submission Guidelines Trimester T1 2021 Unit Code BN108 Unit Title Programming for Networking Assessment Type Individual Assessment...

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