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Spring 2006 Midterm 2 Review

Note: The idea of this review is not to tell you exactly what is going to be on the test but to demonstrate concepts that may appear on the upcoming exam. Although we try to comprise all topics, there is a possibility that other topics covered in class and not on this review will be included on the exam

• If you don't post, neither will we. We will not be posting official solutions to these problems at all! If one of you gets it right, terrific!
• We will try to always point out if an answer is wrong. We won't always point out when the answer is right.
• We are glad to work with you toward the right answer. We can give hints, and we're glad to respond to partial guesses.
• 80% of the TA's are not robots so it may take a while to get a response. Please be patient. Especially if you post in the wee hours of the morning.
• All questions highlighted in blue are a bit trickier. They aren't all that necessary for the test, but if you can solve them, then you know you're doing well.
• These review questions in general are harder than the test.

Whoooo! Look at that text go!

def tickertape(directory, string):
  for frame in range(100):
    canvas = makePicture(getMediaPath("640x480.jpg"))
    x = frame * getWidth(canvas) / 100
    y = abs(50 - frame) * getHeight(canvas) / 100
    addText(canvas, x, y, string)
    num = str(frame)
    if len(num) == 1:
      num = '0' + num
    writePictureTo(canvas, directory + '//frame' + num  + '.jpg')

Movie Code Fragment

def writeFrame(num, directory, framepict):
    framenum=str(num)
    if num < 10:
        writePictureTo(framepict, directory + "//frame00" + framenum + ".jpg")
    if num >= 10 and num < 100:
        writePictureTo(framepict, directory + "//frame0" + framenum + ".jpg")
    if num >= 100:
        writePictureTo(framepict, directory + "//frame" + framenum + ".jpg")

• What does it do?
• Why is it needed?
• Can you write something shorter?

What this do?

def pharaoh(collardGreens, friedOkra):

    for i in range(1, friedOkra + 1):
        keke = ''
        for banana in range(i):
            keke = keke + collardGreens

        print keke

    for i in range(1, friedOkra):
        keke = ''
        for banana in range(friedOkra - i):
            keke = keke + collardGreens

        print keke

Tracing the printing

def newFunction(a, b, c):
    print a
    list1 = range(1, len(c))
    value = 0
    for x in list1:
        print b
        value = value + 1
    print c
    print value

Compute the grade

String Fun

def thingamabob():
  source = "Georgia Institute of Technology"
  vowels = "aeiou"
  source = source.lower()
  for i in vowels:
    loc = source.find(i)
    if loc <> -1:
      source = source[:loc] + source[loc + 1:]
  return source

def thingamajig():
  source = "Georgia Institute of Technology"
  vowels = "aeiou"
  source=source.lower()
  for i in vowels:
    loc = source.find(i)
    while loc <> -1:
      source = source[:loc] + source[loc + 1:]
      loc = source.find(i)
  return source

Short Novel

001110100010110100101001

Encoding and Decoding

>>> letter = "Mr. Mark Guzdial requests the pleasure of your company at..."
>>> print letter.replace('a','!')
Mr. M!rk Guzdi!l requests the ple!sure of your comp!ny !t...
>>> print letter.replace('a','!').replace("e","#")
Mr. M!rk Guzdi!l r#qu#sts th# pl#!sur# of your comp!ny !t...

Count 'em up

>>> for i in "Hello":
...     print i
... 
H
e
l
l
o

The Cover-Up

import os
...

for file in os.listdir(directory):
  if file.endswith(".txt")
    ... perform operations on the current text file

myfile = open(fileNameAndLocation, "rt") #open file for reading
myfile = open(fileNameAndLocation, "wt") #open file for writing, clearing the contents of the file

Address book functions

Charlie Brown:1919 Peanuts Lane:Atlanta, GA:404-992-9292
Peppermint Patty:2020 Cashew Street:Atlanta, GA:404-299-2929
Calvin:101 Tiger Lane:Decatur, GA:770-899-8989

• The first is called lookup that will accept a string as input that will be some part of a name to look up. You should print out the complete line of name, address, and phone-number for the matching person–if the person is found. If the person is not found, you should print "Not found."
• The second is called phone that will take the same input, but will print out JUST THE PHONE NUMBER and "Not found" if the input name is not found.

Poking at your hard drive

• folder
• files
• file
• foo
• bar

Fun with HTML

1. How does <title> differ from <h1>?
2. What information goes between <html> and </html>?
3. What information goes between <body> and </body>?
4. What information goes between <head> and </head>?
5. What would you find inside the <html> and </html> but not surrounded by <body> or <head> tags?

Links to this Page

• Hotspots #3 last edited on 5 May 2008 at 10:40 am by c-76-17-124-0.hsd1.ga.comcast.net
• Spring 2006 Comments - Week of Apr 17th last edited on 5 May 2006 at 12:48 pm by 130.207.178.142