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7.3 "How to think like a computer scientist - Python"

Hello everyone I am glad that I found this forum by searching trough Google, hope you can help me out in my attempt to fully understand Python.

I have followed the guide "How To Think Like a Computerscientist - Python" and i've come to this place where I can't think of any creative ways to do what the exercise says:

As an exercise, modify the program to fix this error.

(It's the Jack, Kack, Lack, Mack, Nack, Ouack, Pack, and Quack Duckling exercise thing I am working on)

http://www.ibiblio.org/obp/thinkCSpy/chap07.htm#3

I know that I could simply just make several of the example code in alphabetical order:

Code:

prefixes = "JKLMNOPQ"

suffix = "ack"



for letter in prefixes:

  print letter + suffix

like ..

Code:

prefix1 = "JKLMN"

prefix2 = "O"

prefix3 = "P"

prefix4 = "Q"

suffix1 = "ack"

suffix2 = "uack"



for letter in prefix1:

  print letter + suffix1



for letter in prefix2:

  print letter + suffix2



for letter in prefix3:

  print letter + suffix1



for letter in prefix4:

  print letter + suffix2

But I am not sure if that is what is meant to be done in this guide? Maybe someone who have done this guide can answer this?

Once again, I hope this forum will grow big and become the main spot for programming help..

How about

Code:

prefixes = "JKLMNOPQ"

suffix = "ack"



for letter in prefixes:

  if letter=="O":letter=letter+"u"

  elif letter=="Q":letter=letter+"u"

  print letter + suffix

Juack
Kuack
Luack
Muack
Nuack
Ouack
Puack
Quack

Is the output of your code.

It worked when I did it. Post your code

First post on your lovely forum, and posting on a bit old post (from 2005). But i want to answer to the problem, because i had the same when this afternoon i tried to do this exercise from the book "How to Think Like a Computer Scientist"

So this is my answer

Code:

prefixes = "JKLMNOPQ"

suffix = "ack"



for x in prefixes:

    if x=="O" or x=="Q":

        print x+"u"+suffix

    else:

        print x+suffix