Software Development

Throughout the course, you've experimented with various problem solving strategies.

They've included:

• stepwise refinement
• divide and conquer
• working backwards
• examples
• extreme cases
• tables and charts
• and everyone's favourite: trial and error

The course began with you using the input-processing-output problem solving model. You've solved problems independently during the course and by the culminating activity, you'll have solved problems as part of a team.

In this unit, we're going to use a formal approach to software development.

The SDLC (Software Development Life Cycle)

The SDLC (Software Development Life Cycle) can be visualized in several ways:

I was taught to visualize the Waterfall model, but in a cycle:

For the purpose of this unit, it doesn't matter which SDLC you choose to follow. What matters is that you learn to follow one. I will go over the phases, but in case you missed it, the phases of the SDLC are also outlined here in this wikipedia.org article.

Project Management Tools: Gantt chart

You can use a Gantt chart, a critical path diagram, or a PERT chart to manage your project for this unit. I recommend a Gantt chart.

Let's look at this sample Gantt chart.

What are the 4 different 'types' of people doing across the 12 days of this office move?

Are days divided?

A simple Gantt charts in Microsoft Excel tutorial.

Test Plan

Create a test plan to test your program.

Begin by writing a list of scenarios, and then track them by indicating pass or fail.

Things to consider: input, output, is it usable, does it meet the requirements?

Track your expected and actual outcomes.

Software Development Assignment

Tasks

1. Play with the turtle module. Try to implement some of the example code. Show me what you built.
2. Choose an SDLC that you would like to follow.
3. I am your client. How will you clarify program specifications (dialogue, questionnaires, survey, research) ? Talk to me.
4. Create a Gantt chart. Plan your 10 days. Your Gantt chart must show your tasks and milestones. Show it to me.
5. Create and use a test plan. Show it to me.
6. Communicate information about the status of your project in writing / orally throughout the project. You should do this during the beginning of each class with me.
7. Only hand in your documented assignment on the due date. The Gantt, survey, test plan and SDLC will have been checked during class time.

Topic

Write an original program using Python that uses the template provided. Your program will draw a variety of shapes for the user using Python's Turtle. Your program will use functions and the a text based menu. Your program will draw:

• A circle, size determined by the user
• A rectangle, size determined by the user
• A random series of lines, total number of lines determined by the user
• Any other shapes you want
• Can you add any bonus features, for example colour lines or colour fill?

The rubric for this assignment is located below.

Program Template for a Menu Driven Program using Functions and Python's Turtle

# Author: Mr. Liconti

# Date: 6/3/2018

# File Name: Software_Dev_Unit_Template.py

# Description: template for ICS3C Software Development Unit

#import statments here

import turtle

#global variables here

flag = True #loop control

userChoice = ''  #var that holds the RETURNED choice from getChoice()

bob = turtle.Turtle() #create a turtle named bob

def showMenu():         #Display menu options 

    print('   MENU')

    print('==========')

    print('D to draw a line')

    print('H for help')

    print('Q to quit')

    print('==========')

    print(' ')

def getChoice():              #get user's choice 

  choice = input('Option?: ')     

  return choice

def showHelp():

  print('This is a template for your Software Development Unit.')

  print('It will draw a straight line using Python\'s Turtle, but that\'s just for an example.')

  print('Please provide a line length when asked.')

  print('You can quit this program from the main menu by pressing Q')

def drawLine():

  length = input('Line Length: ')        #get line lenght from user

  length = int(length)            #changing lenght into a int

  bob.forward(length)             #turtle will draw a line based on user input

print('This program will allow you to draw shapes with the Python Turtle.')

while flag == True:

  showMenu()

  userChoice = getChoice()

  if userChoice == 'H':

    showHelp()

  elif userChoice == 'Q':         #control the loop with the variable flag

    flag = False

  elif userChoice == 'D':

    drawLine()

  else:

        print('Not a valid choice. Only D, Q and H are valid choices') #error message

print('Program ending.')

Python's Turtle

The Logo programming language was invented for educational purposes. The 'turtle graphics' component of Logo is capable of controlling a robotic "turtle" which would draw geometric shapes and patterns. Subsequent implementations of the turtle have been on-screen.

Python includes it's own version of turtle with both the 2.x and 3.x branches.

For a full overview of the Python turtle module, read the API that came with your version of Python (press F1 while running IDLE). Because Python is evolving, remember that if you search for the Python API on the internet, you will probably be looking at the latest version of the language. For example: begin_fill() was fill().

The latest version of the Turtle's API entry is http://docs.python.org/library/turtle.html

Basic shapes, control, and colours are all covered in that API, and in the notes in the course. Please feel free to use the API to improve your project.

I need help with colour pallets all the time. Here are some that I use:

Colours

Visibone - https://visibone.com/colorlab/big.html

Adobe Color - https://color.adobe.com/create/color-wheel/

Paletton - http://paletton.com/#uid=1000u0kllllaFw0g0qFqFg0w0aF

Colourco - http://www.colourco.de/

Setting Colours

import turtle           #import turtle module

bob = turtle.Turtle()   #build turtle

turtle.colormode(255)   #set colour mode to allow for R,G,B

bob.pencolor(255,0,0)

bob.forward(100)

More about Colours

Turtle uses RGB values for specific colours. If you like to use strings, consider this resource from the Tcl/Tk documentation . It's a massive list of strings and RGV values. Not all work.