• 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, April 12th at 11:59 PM

Setup On Your Machine

• Open a text editor.
  I would suggest the text editor built into the program IDLE.
• Save the file as hw10.py

Specification

• Define the class Dog that has the following attributes
  • name
  • breed
  • owner
  • score
• The class must have the following methods
  • __init__
  • get_name
  • get_breed
  • get_owner
  • get_score
  • set_score
  • __str__
  • __gt__
  • __lt__
  • __eq__
  • __ne__
• All the attributes in this class MUST be hidden.

Methods

__init__

• Header

  def __init__(self, name, breed, owner):

• The constructor must set value of score to 0

get_name

• Header

  def get_name(self):

• This method returns the dog's name

get_breed

• Header

  def get_breed(self):

• This method returns the dog's breed

get_owner

• Header

  def get_owner(self):

• This method returns the dog's owner

get_score

• Header

  def get_score(self):

• This method returns the dog's score

set_score

• Header

  def set_score(self, score):

• This method assigns a value to the score attribute

__str__

• Header

  def __str__(self):

• This method returns a string containing all attribute values

__gt__

• Header

  def __gt__(self, other):

• This method returns True if the the object's value for score is greater than the other object's value for score

__lt__

• Header

  def __lt__(self, other):

• This method returns True if the the object's value for score is less than the other object's value for score

__eq__

• Header

  def __eq__(self, other):

• This method returns True if the the object's value for score is equal to the other object's value for score

__ne__

• Header

  def __ne__(self, other):

• This method returns True if the the object's value for score is not equal to the other object's value for score

Test Code

• Your script must contain the following statements

  d1 = Dog("Frank", "Doberman", "Malcom Smith")
  print("name:  ", d1.get_name())
  print("breed: ", d1.get_breed())
  print("owner: ", d1.get_owner())
  print("score: ", d1.get_score())
  d1.set_score(95)
  print("score: ", d1.get_score())
  print(d1)
  d2 = Dog("Rover", "German Shepard", "Bill Busby")
  print(d2)
  d2.set_score(82)
  print("d1 > d2  :", d1 > d2)
  print("d1 < d2  :", d1 < d2)
  print("d1 == d2 :", d1 == d2)
  print("d1 != d2 :", d1 != d2)

• They should appear at the bottom of your script

Output

• The output should look something like this

  name:   Frank
  breed:  Doberman
  owner:  Malcom Smith
  score:  0
  score:  95
  Frank Doberman Malcom Smith
  Rover German Shepard Bill Busby
  d1 > d2  : True
  d1 < d2  : False
  d1 == d2 : False
  d1 != d2 : True

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

1. Create the file hw10.py.
   Write the class header for Dog.
   Write the constructor for this class.
   Make sure the constructor sets the value for each attribute, including score.
   Copy the test code to the bottom of the script.
   Comment out all line in the test code except the first.
   You comment out a line by making # the first character on the line.
   Run the script.
   Fix any errors you find.
2. Create get_name.
   Uncomment the 2nd line of the test script by removing the #.
   Run the script.
   Fix any errors you find.
3. Create get_breed.
   Uncomment the 3rd line of the test script.
   Run the script.
   Fix any errors you find.
4. Create get_owner.
   Uncomment the 4th line of the test script.
   Run the script.
   Fix any errors you find.
5. Create get_score.
   Uncomment the 5th line of the test script.
   Run the script.
   Fix any errors you find.
6. Create __str__.
   Uncomment the next three lines of the test script.
   Run the script.
   Fix any errors you find.
7. Create __gt__ which returns True if the score of the object is greater than the score of the other object.
   Uncomment the next line of the test script.
   Run the script.
   Fix any errors you find.
8. Create __lt__ which returns True if the score of the object is less than the score of the other object.
   Uncomment the next line of the test script.
   Run the script.
   Fix any errors you find.
9. Create __eq__ which returns True if the score of the object is equal the score of the other object.
   Uncomment the next line of the test script.
   Run the script.
   Fix any errors you find.
10. Create __ne__ which returns True if the score of the object is not equal the score of the other object.
    Uncomment the next line of the test script.
    Run the script.
    Fix any errors you find.

Testing on Your Machine

• Open IDLE
• Use the Open command in IDLE to open hw10.py
• Under the Run menu, select Run Module
• Your output should look something like this

  name:   Frank
  breed:  Doberman
  owner:  Malcom Smith
  score:  0
  score:  95
  Frank Doberman Malcom Smith
  Rover German Shepard Bill Busby
  d1 > d2  : True
  d1 < d2  : False
  d1 == d2 : False
  d1 != d2 : True

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 hw10 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/hw10

• Run this script

  hw10.py

• You should see something like this

  name:   Frank
  breed:  Doberman
  owner:  Malcom Smith
  score:  0
  score:  95
  Frank Doberman Malcom Smith
  Rover German Shepard Bill Busby
  d1 > d2  : True
  d1 < d2  : False
  d1 == d2 : False
  d1 != d2 : True

Copyright © 2020 Glenn Hoffman. All rights reserved. May not be reproduced without permission.