Programming Forums - "How to think like a computer scientist

Programming Forums (http://www.programmingforums.org/forumindex.php)

- Python (http://www.programmingforums.org/forum43.html)

- - "How to think like a computer scientist - Python" (http://www.programmingforums.org/showthread.php?t=2972)

"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:

prefixes = "JKLMNOPQ"

suffix = "ack"



for letter in prefixes:

  print letter + suffix

like ..

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..

You seem to have done exactly what is being asked of you in this exercise. Congrats and keep up the good work.

I'm not sure if they covered lists at that point, but you could also do:

prefix = ['J', 'K', 'L', 'M', 'N', 'Ou', 'P', 'Qu']

suffix = 'ack'

for letter in prefix:

    print letter + suffix

Your solution works, but it's not the easiest code to maintain. Try adding a few prefixes to both codes and see which is easier to modify, ie - make it also say Tack, Uack, Vack. Which is easier?

i would like to say to the poster cheers for the link i have been hunting down a fun python tutorial

Wow, I just got my own thoughts confirmed.. What a really nice place this is, with nice people and positive helping posts, thank you for your introduction :D

#4 (Berto)
Yeah it's really nice, you should check out the other books at http://ibiblio.org/obp especially the Python ones.. Makes programming a little funnier.

I can also recommend these books from a friend who is using them in a programming course he's running at the university he is employed.
http://www.oreilly.com/catalog/python2/index.html
http://www.oreilly.com/catalog/lpython2/index.html

Gotta love Python :D ..
http://home.no/dezza/python
Prolly the youngest python programmer in the world ;) ..
I know this is found on O'Reilly somewhere but I couldn't find the destination and I was to lazy to look for it, just kept it for saving.

#2 (peace_of_mind)
Thank you, and what a nice signature of yours, makes a new programmer welcome into the scene.

#3 (Moldz)
Thanks, worked out really fine! I think it have been mentioned, i've read the book (not fully though) before and I know that there is such a thing as lists :) Like you can do things like this:

print prefix[0]+" what a nice functiona!"

By the way, how do I get "return" to print when running the code as script? I know that you can see the + and - in the interpreter, but can you make it print the true/false statement?

I need it in this case:

import string

def isLower2(ch):

  return ch in string.lowercase