IT 117: Intermediate Scripting

IT 117: Introduction to Scripting
Homework 8

Due
What You Need to Do
Setup On Your Machine
Specification
Methods
Test Code
Output
Suggestions
Testing on Your Machine
Copy the Script to Unix
Testing the Script on Unix (Optional)

Due

Sunday, March 29th at 11:59 PM

What You Need to Do

Create the script hw8.py
Make sure it obeys the rules in Rules for Homework Scripts
Make sure the script has a hashbang line and is executable
Move it to an an hw8 directory on pe15.cs.umb.edu

Setup On Your Machine

Open a text editor.
I would suggest the text editor built into the program IDLE.
Save the file as hw8.py

Specification

Define the class DVD that has the following attributes
- title
- studio
- director
This class must have the following methods
- __init__
- get_title
- get_studio
- get_director
- print_dvd

Methods

init

Header

def __init__(self, title, studio, director):

This function must set all three attributes

get_title

Header
```
def get_title(self):
```
This method returns the value of the title attribute

def get_studio(self): `

get_studio

Header
```
def get_studio(self):
```
This method returns the value of the studio attribute

get_director

Header
```
def get_director(self):
```
This method returns the value of the director attribute

print_dvd

Header
```
def print_dvd(self):
```
This method prints a string consisting of the value of the title attribute
Followed by a comma and a space, the value of the studio attribute
Followed by a comma and a space, and the value of the director attribute

Test Code

Your script must contain the following statements

dvd = DVD("Forbidden Planet", "Metro-Goldwyn-Mayer", "Fred M. Wilcox")
print(dvd.get_title())
print(dvd.get_studio())
print(dvd.get_director())
dvd.print_dvd()

They should appear at the bottom of your script

Output

The output should look something like this

Forbidden Planet
Metro-Goldwyn-Mayer
Fred M. Wilcox
Forbidden Planet, Metro-Goldwyn-Mayer, Fred M. Wilcox

Suggestions

Write this script in stages
Test your script at each step
Print the steps below
And check them off as you finish each one

Create the file hw8.py.
Write the class header for DVD.
Write the constructor for this class.
Make sure the constructor has parameters for each attribute.
Make sure the constructor sets the value foe each attribute.
Add the first line of the test code to the bottom of the file.
Run the script.
Fix any errors you find.
Create the method get_title.
Add the second line of the test code to the bottom of the file.
Run the script.
Fix any errors you find.
Create the method get_studio.
Add the third line of the test code to the bottom of the file.
Run the script.
Fix any errors you find.
Create the method get_director.
Add the fourth line of the test code to the bottom of the file.
Run the script.
Fix any errors you find.
Create the method print_dvd.
Add the last line of the test code to the bottom of the file.
Run the script.
Fix any errors you find.

Testing on Your Machine

Open IDLE
Use the Open command in IDLE to open hw8.py
Under the Run menu, select Run Module

Your output should look something like this

Forbidden Planet
Metro-Goldwyn-Mayer
Fred M. Wilcox
Forbidden Planet, Metro-Goldwyn-Mayer, Fred M. Wilcox

Copy the Script to Unix

Open FileZilla and connect to pe15.cs.umb.edu
Go to your it117 directory
Go to your hw directory
Right-click in the whitespace inside the hw directory
Enter hw8 in the dialog box
Click and drag your script from the bottom left panel to the bottom right panel
Right-click on the file and select "Permissions" from the menu
Enter 755 in the box provided
This will make the script executable

Testing the Script on Unix (Optional)

Connect to pe15.cs.umb.edu using an ssh client like putty.exe (Windows) or ssh (Mac)
Go to the directory for this exercise
```
cd  it117/hw/hw8
```
Run this script
```
hw8.py
```

You should see something like this

Forbidden Planet
Metro-Goldwyn-Mayer
Fred M. Wilcox
Forbidden Planet, Metro-Goldwyn-Mayer, Fred M. Wilcox