CSC111 Lab 6
This lab is under construction...
Contents
More String Methods
The methods are all documented at this page: http://docs.python.org/lib/string-methods.html. Open this page while you working on this lab.
center()
One of the string methods is the center function. Use it to center the title "computer SCIENCE 111" between two lines of 45 dashes. Use a variable called myTitle to store the string.
myTitle = "computer SCIENCE 111"
print 45*"-"
print myTitle.center( 45 )
print 45*"-"
capitalize()
Instead of printing the variable myTitle, print myTitle.capitalize( ) and see what happens.
upper()
Use upper() instead of capitalize(). Observe the new output.
title()
Same exercise, but with the title() method. How can you make the program display the lowercase version of your title without your modifying the myTitle variable?
- Programming Question 1
- Write a program that uses functions, that asks for your name, then your last name, and prints both of them centered between two lines of 60 dashes. Make your program capitalize the first letter of each word.
- Example
your first name? alexAndra
your last name? SMITH
------------------------------------------------------------
Alexandra Smith
------------------------------------------------------------
Replacing substrings in a string
To replace a substring of a string (or a word in a sentence), all you need to do is to use the replace() method.
sentence = """Strength is the capacity to break a chocolate
bar into four pieces with your bare hands - and
then eat just one of the pieces"""
print sentence
sentence = sentence.replace( "chocolate", "carrot" )
print sentence
Try it and replace the word "piece" by the word "chunk" in the same sentence, so that now you're breaking carrots into chunks.
Massive replacement
We are still dealing with the sentence above, but we want to replace four separate words by four new words. The words we want to replace are in this list:
toBeReplaced = ["chocolate", "piece", "hand", "break"]
and the replacement words are in this list:
newWords = ["carrot", "chunk", "elbow", "melt"]
Write some python code that will use sentence and replace chocolate by carrot, then it will look for piece and replace it by chunk, hand by elbow, and break by melt. Use a for-loop!
Count()
Read the documentation on the method count() and write a program or a function that outputs the number of times the word "piece" appears in sentence using the count() method.
Strip()
Read the documentation about the method strip() and see it can help you do with strings such as these:
listOfStrings = [ " But then, shall I never get any older than I am now? ",
" That'll be a comfort, one way -- never to be an old woman -- ",
" but then -- always to have lessons to learn! ",
" Alice " ]
Splitting strings
First, read the documentation on the split() method.
Let's use the same string as before.
sentence = """Strength is the capacity to break a chocolate
bar into four pieces with your bare hands - and
then eat just one of the pieces"""
And process it that way
list1 = sentence.split( "\n" ) print "list1 = ", list1 list2 = sentence.split( ) print "list2 = ", list2 list3 = sentence.split( 's' ) print "list3 = ", list3
- Programming Question 2
- Make your program print the number of words in sentence (there are several ways to do that: one long, one very short).
- Programming Question 3
- Make your program display the first and last words of the sentence.
- Programming Question 4
- Assume that you have a string of this type:
NYTBestSellers = """1. THE HELP, by Kathryn Stockett
2. WORST CASE, by James Patterson and Michael Ledwidge
3. THE LOST SYMBOL, by Dan Brown
4. POOR LITTLE BITCH GIRL, by Jackie Collins
5. WINTER GARDEN, by Kristin Hannah """
- Write the code that will take this string, process it, and output the information in a different format, shown below:
Kathryn Stockett The Help James Patterson and Michael Ledwidge Worst Case Dan Brown The Lost Symbol Jackie Collins Poor Little Bitch Girl Kristin Hannah Winter Garden
