IT 117: Intermediate Scripting

IT 117: Introduction to Scripting
Homework 9

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, November 10th at 11:59 PM

What You Need to Do

Create the script hw9.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 hw9 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 hw9.py

Specification

Define the class Book that has the following attributes
- title
- subtitle
- author
- publisher
This class must have the following methods
- get_title
- get_subtitle
- get_author
- get_publisher
- __str__
All attributes in this class MUST be hidden

Methods

init

Header

def __init__(self, title, subtitle, author, publisher):

This method must set all attributes

get_title

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

get_subtitle

Header
```
def get_subtitle(self):
```
This method returns the value of the subtitle attribute

get_author

Header
```
def get_author(self):
```
This method returns the value of the author attribute

get_publisher

Header
```
def get_publisher(self):
```
This method returns the value of the publisher attribute

str

Header
```
def __str__(self):
```
This method returns a string with the values of title, subtitle, author and publisher, each separated by a comma

Script for this assignment

Open an a text editor and create the file hw9.py.

You can use the editor built into IDLE or a program like Sublime.

Test Code

Your hw9.py file must contain the following test code at the bottom of the file:

book = Book("Guns, Germs, and Steel", "The Fates of Human Societies", "Jared Diamond", "Norton")
print(book.get_title())
print(book.get_subtitle())
print(book.get_author())
print(book.get_publisher())
print(book)

You should see

Guns, Germs, and Steel
The Fates of Human Societies
Jared Diamond
Norton
Guns, Germs, and Steel: The Fates of Human Societies, Jared Diamond, Norton

Suggestions

Write this program in a step-by-step fashion using the technique of incremental development.

In other words, write a bit of code, test it, make whatever changes you need to get it working, and go on to the next step.

Make a copy of your hw8.py file in your hw9 directory.
Change the name of this file to hw9.py
Remove all the test code from hw9.py
Run the script.
You should see nothing. Fix any problem you find.
Change __init__ by adding the parameter publisher.
Copy the first line of the test code to the bottom of your script.
Run the script.
You should see nothing. Fix any problem you find.
Change __init__ and get_title so the attribute title is hidden.
Copy the 2nd line of the test code to the bottom of your script.
Run the script.
Fix any problem you find.
Change __init__ and get_subtitle so the attribute subtitle is hidden.
Copy the 3rd line of the test code to the bottom of your script.
Run the script.
Fix any problem you find.
Change __init__ and get_author so the attribute author is hidden.
Copy the 4th line of the test code to the bottom of your script.
Run the script.
Fix any problem you find.
Change __init__ so it sets the value of the attribute publisher.
Create the method get_publisher that returns the value of this attribute.
Copy the 5th line of the test code to the bottom of your script.
Run the script.
Fix any problem you find.
Remove the method print_book.
Replace it with the method __str__ which returns a string containing the values of each of the attributes.
Copy the last line of the test code to the bottom of your script.
Run the script.
Fix any problem you find.

Testing on Your Machine

Open IDLE
Use the Open command in IDLE to open hw9.py
Under the Run menu, select Run Module

Your output should look something like this

Guns, Germs, and Steel
The Fates of Human Societies
Jared Diamond
Norton
Guns, Germs, and Steel: The Fates of Human Societies, Jared Diamond, Norton

Copy the file to Unix

Open FileZilla and connect to pe15.cs.umb.edu
You will have to connect using your Unix username and password.
Go to your 117 directory
Go to your hw directory
Inside this directory create the directory hw9
Copy your hw9.py file from your machine to the hw9 directory on pe15

Make the File Executable

Connect to pe15.cs.umb.edu
Use an ssh client.
Go to your it117 directory
```
cd 117
```
Go to your hw directory
```
cd hw
```
Go to your hw9 directory
```
cd hw9
```
Change the permissions on the script
```
chmod 755 hw9.py
```

Due