Programming Forums > Script Programming > Python

Dietrich · Nov 18th, 2006, 7:37 PM

Wow, that got the soup boiling! There are the C/C++ experts, and then there is the C/C++ crowd mostly lost in memory allocations, pointers, and other things the prof comes up with to kill time. Sorry DaWei, I didn't originally consider you part of the crowd.

Hello Sane! Nice to know you are still looking in every now and then!
Thanks Arevos for the hint on Haskell. Can you point me into the right direction?

DaWei · Nov 18th, 2006, 8:41 PM

Game_Ender · Nov 19th, 2006, 1:29 AM

Quote:

Originally Posted by DaWei

On further reflection, I must confess that I considered that an utterly stupid statement, ...

I assume you are talking about me there. Let me explain (or just babel if you weren't talking to me) I was just giving and example of where C++ has some of 'meta' programming like qualities of python. Then went on to describe how a language like python allows you to many things that would take pages of template code in C++ (hence the joy factor) in just a few lines. The last part was a little cheap shot at Java but hey, Python has multiple inheritance and operator overloading and is still considered easy to learn.

Edit: Try the homepage of Haskell.

Dietrich · Nov 19th, 2006, 10:33 PM

Thanks Game_Ender for the Haskell ref!
Yes, I have looked at boost, 20M+ zipped, found it to be overwhelming in size and complexity. Beating yourself with chains comes to mind! I think it was one of the reasons I switched to Python.

DaWei · Nov 19th, 2006, 11:07 PM

Nah, Game Ender, it was the 'fear' remark. I'm not a professional programmer, and C++ is just one of my occassional tools, but fear has never been involved and the bottom line has always come through nicely.

MicDareall · Dec 29th, 2006, 9:19 AM

Quote:

Originally Posted by Dietrich

Has anybody explored the Python Tkinter GUI Builder (ptkgb) at:
http://sourceforge.net/projects/ptkgb/
?

I haven't used one but Ive used pythoncard which looks like the equivalent to it for wxPython and I love it.

As far as the topic goes, personally I find python is alot quicker to develop in. I love python. I have alot more experience in C/C++ then I do any language but I always revert back to python when I have an Idea for a program that won't be too greatly effected by the speed differences. For example the other day I wrote a fully functioning FTP client with GUI in a matter a couple hours in less then 500 lines of code using Python, wxPython and Pythoncard. It would have taken me alot longer in C/C++ as well as alot more code to tackle the same task. For me atleast, python does cut down on development time.

jazzychic18 · Jan 3rd, 2007, 6:36 PM

what kind of programs can you write with python?

Game_Ender · Jan 4th, 2007, 8:02 PM

The real question is what can't you write in python. You can write anything but an operating system or dynamic library in python.

jazzychic18 · Jan 4th, 2007, 11:36 PM

i have a question. like im like trying to learn how to program in python. and like can anyone tell me what loops are used for and whats an easy way to learn them. is there like some sort of like formula

Arevos · Jan 5th, 2007, 5:04 AM

Loops are used for repeating blocks of code. There are two basic types of loops; while loops, which keep repeating until a condition is met, and for loops, which repeat for each item in a list.

Here's an example of a "while" loop:

 python Syntax (Toggle Plain Text) 
from datetime import datetime
 
while user_input != "q":
    print "The date and time is %s" % datetime.now()
 
    print "Type in 'q' to quit, or press enter to print the date again."
 
    user_input = raw_input()
from datetime import datetime

while user_input != "q":
    print "The date and time is %s" % datetime.now()

    print "Type in 'q' to quit, or press enter to print the date again."

    user_input = raw_input()

The while loop will keep repeating the date and time until the user types in "q".

And here's an example of a "for" loop:

 python Syntax (Toggle Plain Text) 
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
 
print "The 7 times table: "
 
for number in numbers:
    print "%d times 7 is %d" % (number, number * 7)
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

print "The 7 times table: "

for number in numbers:
    print "%d times 7 is %d" % (number, number * 7)

The for loop will output the 7 times table, without you having to type every line. You can also use the "range" function to return a list of numbers:

 python Syntax (Toggle Plain Text) 
>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1, 10)
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1, 11)
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1, 10)
[1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> range(1, 11)
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

When given one number N, the sequence range returns is 0 <= x < N. When given two numbers N and M, the range is N <= x < M.

It's a little counter intuitive, but there are a few good reasons for not including the last number.

Nov 18th, 2006, 7:37 PM	#21
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	Wow, that got the soup boiling! There are the C/C++ experts, and then there is the C/C++ crowd mostly lost in memory allocations, pointers, and other things the prof comes up with to kill time. Sorry DaWei, I didn't originally consider you part of the crowd. Hello Sane! Nice to know you are still looking in every now and then! Thanks Arevos for the hint on Haskell. Can you point me into the right direction? __________________ I looked it up on the Intergnats!

Nov 18th, 2006, 8:41 PM	#22
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	__________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Nov 19th, 2006, 10:33 PM	#24
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	Thanks Game_Ender for the Haskell ref! Yes, I have looked at boost, 20M+ zipped, found it to be overwhelming in size and complexity. Beating yourself with chains comes to mind! I think it was one of the reasons I switched to Python. __________________ I looked it up on the Intergnats!

Nov 19th, 2006, 11:07 PM	#25
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Nah, Game Ender, it was the 'fear' remark. I'm not a professional programmer, and C++ is just one of my occassional tools, but fear has never been involved and the bottom line has always come through nicely. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jan 5th, 2007, 5:04 AM	#30
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	Loops are used for repeating blocks of code. There are two basic types of loops; while loops, which keep repeating until a condition is met, and for loops, which repeat for each item in a list. Here's an example of a "while" loop: python Syntax (Toggle Plain Text) from datetime import datetime while user_input != "q": print "The date and time is %s" % datetime.now() print "Type in 'q' to quit, or press enter to print the date again." user_input = raw_input() from datetime import datetime while user_input != "q": print "The date and time is %s" % datetime.now() print "Type in 'q' to quit, or press enter to print the date again." user_input = raw_input() The while loop will keep repeating the date and time until the user types in "q". And here's an example of a "for" loop: python Syntax (Toggle Plain Text) numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] print "The 7 times table: " for number in numbers: print "%d times 7 is %d" % (number, number * 7) numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] print "The 7 times table: " for number in numbers: print "%d times 7 is %d" % (number, number * 7) The for loop will output the 7 times table, without you having to type every line. You can also use the "range" function to return a list of numbers: python Syntax (Toggle Plain Text) >>> range(10) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] >>> range(1, 10) [1, 2, 3, 4, 5, 6, 7, 8, 9] >>> range(1, 11) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] >>> range(10) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] >>> range(1, 10) [1, 2, 3, 4, 5, 6, 7, 8, 9] >>> range(1, 11) [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] When given one number N, the sequence range returns is 0 <= x < N. When given two numbers N and M, the range is N <= x < M. It's a little counter intuitive, but there are a few good reasons for not including the last number.

Jan 3rd, 2007, 6:36 PM	#27
jazzychic18 Newbie Join Date: Jan 2007 Posts: 3 Rep Power: 0	what kind of programs can you write with python?

Jan 4th, 2007, 8:02 PM	#28
Game_Ender Professional Programmer Join Date: May 2006 Location: Maryland, USA Posts: 306 Rep Power: 3	The real question is what can't you write in python. You can write anything but an operating system or dynamic library in python.

Jan 4th, 2007, 11:36 PM	#29
jazzychic18 Newbie Join Date: Jan 2007 Posts: 3 Rep Power: 0	i have a question. like im like trying to learn how to program in python. and like can anyone tell me what loops are used for and whats an easy way to learn them. is there like some sort of like formula

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[tutorial] Python for programming beginners	coldDeath	Python	30	Dec 14th, 2005 12:35 PM
If you want to learn Python or improve your Python skills	coldDeath	Python	2	Nov 23rd, 2005 1:27 AM
Convert Python script to C++ code	clanotheduck	Python	17	Sep 25th, 2005 9:55 AM
Advanced Python Tricks	Arevos	Python	19	Sep 24th, 2005 8:39 AM
Python - A Programmers Introduction	coldDeath	Python	17	Aug 19th, 2005 1:41 PM

Programming Forums > Script Programming > Python

Perfect Python