CSE 142: Computer Programming I, Autumn 2010

This week we will be discussing a third-party python library called pygame. With pygame we can easily make appealing and interactive video games. Pygame still uses python 2.6.

Python Homework 10: game
Due Monday, December 13, 11:30pm. Turn in Python10 here.
No late turnins accepted.

The assignment: Turn in game.py, any interactive game written in python using the Pygame library except for the whack-a-mole game. Notice that the due date is in January, so your reward for turning in this assignment is straight up cool points.

Python Homework 8: Date
Turn in Python HW8 here.
Due no later than Monday, December 6, 11:30pm.

Do a new object-oriented assignment that practices today's material on Python classes and objects. There will be two files to turn-in. The first is a file named date.py that implements a class Date, where each Date object represents a single calendar month/day date such as September 19. Each Date object should have the following behavior:

• A constructor that accepts a month and day as parameters.
• A days_in_month method to return the number of days in that Date object's month.
• A next_day method that changes the state of the Date by advancing it 1 day in time. For example, the next day after 9/19 is 9/20; the next day after 9/30 is 10/1; and the next day after 12/31 is 1/1
• A __str__ method to convert the Date into a string such as "9/19".

For example, it should be possible to use the Date class in the following way at the interpreter:

>>> d = Date(9, 29)
>>> d.month
9
>>> d.day
29
>>> d.days_in_month()
30
>>> d.next_day()
>>> d.month
9
>>> d.day
30
>>> d.next_day()
>>> d.month
10
>>> d.day
1
>>> d.days_in_month()
31
>>> str(d)                         # calls __str__
'10/1'
>>> d.next_day()
>>> str(d)                         # calls __str__
'10/2'

The second file to submit is called birthday2.py. This file should be a client program that uses your Date objects to find out how many days it is until the user's next birthday. The following is a sample run of the birthday2 program:

Please enter today's date:
What is the month? 7
What is the day? 24

Please enter your birthday:
What is the month? 11
What is the day? 6

Your next birthday of 11/6 is in 105 day(s).

Notice that this version of the program doesn't print the absolute day of the year for today or the birthday. You should figure out how many days it is until the user's birthday in a different way. Starting from today, if you walk forward in time until the user's birthday, one day at a time, counting how many steps you took, you'll know how many days it is until the user's next birthday. You don't need to handle the "birthday is tomorrow" case this time; just either print Happy Birthday! or print how many day(s) until the next birthday.

The reward for turning in this program is 1 extra late day for use on your normal Java programs, and +1 charisma and 2 saving throws. (Since it's the end of the quarter, getting extra late days is less motivating than it used to be. Mostly you'd just be doing this one for the learning experience.)

If you missed any of the python lectures in the past and you still would like to learn, then come to the python lecture this week. We will be reviewing all of the old material as well as introducing some new things.

Python Homework 6: You Choose
Due Saturday, November 20, 11:30pm. Turn in Python HW6 here.

The assignment: Turn in one of the previous homework assignments if you didn't get a chance to before. The reward for this program is 1 extra late day. Instructions: for your first file, name it review.py. Any subsequent homeworks should have the name of the assignment such as song.py or guessing_game.py.

pdf

dice.py

screen_saver.py

Python Homework 5: Guessing Game
Due Saturday, November 6, 11:30pm. Turn in Python HW5 here.

The assignment: Turn in a file guessing_game.py containing a Python version of your HW5 guessing game program. The reward for turning in this program is 1 extra late day for use on your normal Java programs.

For an extra challenge: implement a two-dimensional guessing game, still named guessing_game.py, according to these specifications.

The program will look like this:

This program is a 2-D guessing game.
I will think of a point somewhere
between (1, 1) and (20, 20)
and give hints until you guess it.

Guess x: 5
Guess y: 7
You're cold. Go south east
Guess x: 18
Guess y: 5
You're cold. Go south west
Guess x: 15
Guess y: 2
You're warm. Go north west
Guess x: 12
Guess y: 3
You're hot! Go north west
Guess x: 11
Guess y: 4
You got it right in 5 guesses!

Overall results:
Games played  = 1
Total guesses = 5
Guesses/game  = 5.0

More sample output:

Test 1 | Test 2 | Test 3 | Test 4 | Test 5

Python Homework 4: Birthday
Due Sunday, October 31, 11:30pm. Turn in Python HW4 here.
No late turnins accepted.

The assignment: Turn in a file birthday.py containing a Python program that produces output such as the output below. The task is identical to the Java HW4 except that you will also print out the user's astrological sign such as Leo or Virgo. At the bottom of your program, you should print an interesting fact about your own astrological sign, or your sign's current horoscope. Check here to find the date ranges for each sign, or look at the following table:

The following is an example output from your program. Notice that for simplicity, the month and day are read on separate lines.

This program tells you how many days
it will be until your next birthday.

Please enter today's date:
What is the month (1-12)? 7
What is the day   (1-31)? 24
7/24 is day #205 of 365.

Please enter your birthday:
What is the month (1-12)? 11
What is the day   (1-30)? 6
11/6 is day #310 of 365.

Your next birthday is in 105 days.

You are a Scorpio.
<< your sign's fact or horoscope here >>

Python Homework 3: Circles
Due Monday, October 25, 11:30pm. Turn in Python HW3 here.
No late turnins accepted.

The assignment: Turn in a file circles.py (lowercase c) containing a Python version of your HW3 Circles program that produces the output shown below, essentially the same as the Java version but drawn in Python. The window size and coordinates of all drawn figures are the same as in the Java version. As a reference, our sample solution is 40 lines long. The reward for turning in this program is 1 extra late day for use on your normal Java programs.

You won't be able to check your output since our Python DrawingPanel doesn't know how to compare images. But we will be lenient on whether the graphical output exactly matches. If you like, you can play around a bit with the exact colors and coordinates to produce a figure you like better, so long as the overall appearance closely matches the above screenshot.

Producing the above output will count for full credit, but if that sounds too easy for you and you want an added challenge, you can instead make your circles.py program produce the output below, drawing "globe" figures instead of the normal target figures. This is harder, but probably not as hard as it looks! Read below to see how to do it.