Programming Forums > Script Programming > Python

dezza · Mar 28th, 2005, 12:58 PM

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:

(Toggle Plain Text)

prefixes = "JKLMNOPQ"
suffix = "ack"

for letter in prefixes:
  print letter + suffix

like ..

(Toggle Plain Text)

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..

peace_of_mind · Mar 28th, 2005, 2:02 PM

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

Moldz · Mar 28th, 2005, 2:47 PM

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

(Toggle Plain Text)

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?

Berto · Mar 29th, 2005, 1:51 AM

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

dezza · Mar 29th, 2005, 9:41 AM

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

#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

..
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:

(Toggle Plain Text)

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:

(Toggle Plain Text)

import string
def isLower2(ch):
  return ch in string.lowercase

Mar 28th, 2005, 12:58 PM	#1
dezza Newbie Join Date: Mar 2005 Location: Denmark Posts: 16 Rep Power: 0	"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: (Toggle Plain Text) prefixes = "JKLMNOPQ" suffix = "ack" for letter in prefixes: print letter + suffix prefixes = "JKLMNOPQ" suffix = "ack" for letter in prefixes: print letter + suffix like .. (Toggle Plain Text) 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 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..

Mar 29th, 2005, 9:41 AM	#5
dezza Newbie Join Date: Mar 2005 Location: Denmark Posts: 16 Rep Power: 0	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 #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 .. 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: (Toggle Plain Text) print prefix[0]+" what a nice functiona!" 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: (Toggle Plain Text) import string def isLower2(ch): return ch in string.lowercase import string def isLower2(ch): return ch in string.lowercase __________________ Come in and have a talk! #programmingforums @ Freenode Specialities: Linux, XHTML/HTML and CSS. Learning: Python Folding@Home Stats System Requirements: Windows 9x/ME/2000/XP or better Okay, that makes it run on Linux right? Last edited by dezza; Mar 29th, 2005 at 2:18 PM.

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Mar 28th, 2005, 2:02 PM	#2
peace_of_mind Professional Programmer Join Date: Sep 2004 Location: Hell if I know most of the time Posts: 435 Rep Power: 4	You seem to have done exactly what is being asked of you in this exercise. Congrats and keep up the good work. __________________ Amateurs built the ark Professionals built the Titanic

Mar 28th, 2005, 2:47 PM	#3
Moldz Programmer Join Date: Feb 2005 Posts: 54 Rep Power: 4	I'm not sure if they covered lists at that point, but you could also do: (Toggle Plain Text) prefix = ['J', 'K', 'L', 'M', 'N', 'Ou', 'P', 'Qu'] suffix = 'ack' for letter in prefix: print letter + suffix 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?

Mar 29th, 2005, 1:51 AM	#4
Berto Programming Guru Join Date: Aug 2004 Posts: 1,022 Rep Power: 5	i would like to say to the poster cheers for the link i have been hunting down a fun python tutorial

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Programming Forums > Script Programming > Python

"How to think like a computer scientist - Python"