Re: [Tutor] (no subject)
Timothy Grant wrote: On Tue, Sep 30, 2008 at 10:20 PM, Pierre Dagenais <[EMAIL PROTECTED]> wrote: kayla bishop wrote: I can't figure out how to write a program where you flip a coin 100 times and it keeps track of how many heads and tails you flipped but it has to be random. Can you please help _ Get more out of the Web. Learn 10 hidden secrets of Windows Live. http://windowslive.com/connect/post/jamiethomson.spaces.live.com-Blog-cns!550F681DAD532637!5295.entry?ocid=TXT_TAGLM_WL_domore_092008 ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.173 / Virus Database: 270.7.5/1698 - Release Date: 29/09/2008 7:25 PM Here is how one newbie would do it: import random # Initialize variables head = 0 tail = 0 # Flip the coin a hundred times for x in range(100): choice = random.randint(1,2) # Is it 'head'? if choice == 1 : head = head + 1 # If not 'head' then it must be tail else : tail = tail + 1 print "head = ",head print "tail = ",tail ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor Please let us know if Pierre gets an an "A" on that assignment or not Kayla. If that's what it is, and I thought it might be, he won't learn how to program but on exam day he'll realize that cheating is very expensive. A great lesson to learn early in life if possible. On the other hand if Kayla is just new to programming and learning on his own, then some silly mistake can take weeks to figure out and is a huge waste of time, as I experienced when learning basic on my beloved ZX81. Besides any teacher worth it's wiff should scan this list for cheaters, right? Have a nice day, both of you. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python: can't open file 'test.py' : [Errno 2] No such file or directory
Timothy Grant wrote: On Tue, Sep 30, 2008 at 9:01 PM, Pierre Dagenais <[EMAIL PROTECTED]> wrote: Timothy Grant wrote: On Tue, Sep 30, 2008 at 12:58 PM, Pierre Dagenais <[EMAIL PROTECTED]> wrote: The file test.py is in I:\Python25\MyCode, if I enter: C:\>Python25\MyCode\python25 test.py at the DOS prompt, everything works as I would expect. However when I enter the same command from any other directory I get this error: C:\>python test.py python: can't open file 'test.py' : [Errno 2] No such file or directory I've set the environment variable pythonpath as C:\>set pythonpath = C:\\Python25\\MyCode what am I doing wrong, Thank u for your help, ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor You need to give the full path to your test.py file. PYTHONPATH sets the python library search path. Thank you Tim, Definitively C:\python \python25\mycode\test.py does work. If you're right about having to give the full path, and I suspect you are, Then this means that python knows to search the currennt working directory for the file to execute, but nowhere else. It seems a strange behavior. Maybe this is on Mr. Guido van Rossum todo list. Why is that strange? Would you expect any other program not on the path to execute without a fully qualified path? Make your python code executable, and put it somewhere on the path and I'm quite sure it would run as expected (though it has been over 10 years since I last had to work on a Windows box so I'm not quite sure how to do that). Yes Tim, but both PATH and PYTHONPATH are set to \python25 and \python25\MyCode, so I don't understand why python searches the CWD but neither the path nor pythonpath directories. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python: can't open file 'test.py' : [Errno 2] No such file or directory
"Pierre Dagenais" <[EMAIL PROTECTED]> wrote The file test.py is in I:\Python25\MyCode, There is an inconsistency here. You say at this point that the drive is I I've set the environment variable pythonpath as C:\>set pythonpath = C:\\Python25\\MyCode But here you add a folder in the C drive? Definitively C:\python \python25\mycode\test.py does work. If you're right about having to give the full path, and I suspect you are, Then this means that python knows to search the currennt working directory for the file to execute, but nowhere else. Correct, just like every other program. If you run notepad foo.txt notepad will open a new foo.txt in the current folder it will not search your drive to find some other foo.txt that you created prevbiously. Why would python be any different? The trick to do what you want is not to execute python but to execute the script and allow the OS to associate Python with it. So either just type the script name into the prompt (assuming it is on the PATH) or double click in explorer and Windows will find Python itself. HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Idle and windows XP firewall
At work I have windows XP service pack 3 and although I have sys admin I can not use idle. I have googled but no success - any ideas? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python: can't open file 'test.py' : [Errno 2] No such file or directory
"Pierre Dagenais" <[EMAIL PROTECTED]> wrote Yes Tim, but both PATH and PYTHONPATH are set to \python25 and \python25\MyCode, so I don't understand why python searches the CWD but neither the path nor pythonpath directories. Because that's how Windows works, its how Bill Gates decided it should be... Its what Windows calls the Working Folder and by default for the command prompt its the one you are in. It can be argued that it is "A Good Thing" since it allows you to have several python scripts of the same name and not have the wrong script accidentally being started. HTH, Alan G. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Heads & Tails was Re: (no subject)
"kayla bishop" <[EMAIL PROTECTED]> wrote Please use a sensible subject line I can't figure out how to write a program where you flip a coin 100 times and it keeps track of how many heads and tails you flipped but it has to be random. This sounds like homework so we cannot give you a solution. But here are some questions that may help you find a solution: 1) could you write a program to ask the user for a head or a tail and store the answer? 2) could you make that program repeat 10 times and store the count of heads only? 3) could you store the total for heads and tails into two separate totals? 4) could you replace the user input with a random number? 5) could you make the random number result be one of two values - say head and tail? 6) could you increase the repetitions to 100? Done all that? Then you've solved your problem. If you didn't where did you get stuck? Show us your code and any errors. HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] (no subject)
On Wed, Oct 1, 2008 at 3:55 AM, Pierre Dagenais <[EMAIL PROTECTED]> wrote: > Timothy Grant wrote: > If that's what it is, and I thought it might be, he won't learn how to > program but on exam day he'll realize that cheating is very expensive. A > great lesson to learn early in life if possible. On the other hand if Kayla > is just new to programming and learning on his own, then some silly mistake > can take weeks to figure out and is a huge waste of time, as I experienced > when learning basic on my beloved ZX81. Besides any teacher worth it's wiff > should scan this list for cheaters, right? Regardless of how you feel about cheating, or whether the teacher is reading the list, the policy on this list is not to knowingly supply explicit answers to homework questions. We give hints and help learners when they are stuck. You didn't even give Kayla a chance to get stuck. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] (no subject)
Since an answer has already been given (by Pierre Dagenais), let's see if we can help you "figure it out". The first step is to read the program specification, or, in your case, read the homework problem very carefully. Since most computer programs have INPUT, PROCESS, and OUTPUT, let's try to look at the problem from that viewpoint, shall we? On Tue, Sep 30, 2008 at 10:47 PM, kayla bishop <[EMAIL PROTECTED]> wrote: > I can't figure out how to write a program where you flip a coin 100 times > and it keeps track of how many heads and tails you flipped but it has to be > random. Can you please help Well, since you said the magic word, I'll try. First of all, a hash mark designates a comment. A comment isn't read by the computer. Everything after a hash mark isn't read by the computer, BUT you can read it, and that's why it is always a good idea to use comments in your program. We can break down the problem into INPUT, PROCESS and OUTPUT as follows: > I can't figure out how to [INPUT, PROCESS, OUTPUT] > write a program > where you flip a "coin" [INPUT] > 100 times [PROCESS] > and it keeps track of how many heads and tails you flipped [OUTPUT] > but it has to be random. [PROCESS] You have a coin which has two sides "heads" and "tails", so that is the INPUT. You flip the coin 100 times, and each time you flip it, the result is random. That is the PROCESS. You keep track of how many times it comes up heads and tails. That is the OUTPUT. That wasn't too difficult, was it? Python has a lot of modules that are already written for you. That's way cool because you don't have to figure that part out! Doing random things is one of those things you don't have to figure out, because there is a module called random. You can use the stuff in random by importing it into your program. Find out more about random in the Python documentation. This is usually done at the top of the program. #!/usr/bin/python # flipCoin.py # 2008-10-01 # b h a a l u u at g m a i l dot c o m import random #Next you need some INPUT. I think we decided that the #coin would be INPUT, right? And the coin has 'heads' and 'tails'? #Let's make a "list" for the coin: coin = ['heads', 'tails'] #Lists are surrounded by square brackets. #But the program needs to choose those randomly, right? flip = random.choice(coin) #Now, let's count how many times you flip the coin. count = 100 #Finally, keep track of heads and tails: heads = 0 tails = 0 #They're zero because you haven't flipped the coin yet. #Now, let's flip the coin (PROCESS). while count != 0: #each time through the loop, flip will randomly choose a side of the coin flip = random.choice(coin) #if/else selection. There are only two choices. if flip == "heads": heads += 1 else: tails += 1 #decrement the counter, or you'll be in an infinite loop #it started at 100, so subtract one each iteration count -= 1 #Finally, let's print the OUTPUT: print "Heads: ", heads print "Tails: ", tails Not the indentation after the while loop line. That's a Python thing. Since I've put so much time into this tutorial, I have a challenge for you: Write a program that rolls a pair of ten-sided dice, and tell me what the outcome of the roll is? How about the outcome of three rolls? Happy Programming! -- b h a a l u u at g m a i l dot c o m Kid on Bus: What are you gonna do today, Napoleon? Napoleon Dynamite: Whatever I feel like I wanna do. Gosh! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] PyCon 2009 (US) - Call for Tutorials
The period for submitting tutorial proposals for Pycon 2009 (US) is open and will continue through Friday, October 31th. This year features two "pre-conference" days devoted to tutorials on Wednesday March 25 & Thursday March 26 in Chicago. This allows for more classes than ever. Tutorials are 3-hours long on a specific topic of your choice. Last year we featured classes on Learning Python, Web Development, Scientific Computing, and many more. Class size varied from 10 to over 60 students. The extended time spent in class allows teachers to cover a lot of material while allowing for interaction with students. The full Call for Tutorial Proposals, including submission details, an example proposal as well as a template, is available at < http://us.pycon.org/2009/tutorials/proposals/>. Tutorial selections will be announced in early December to give you time to prepare your class and PyCon will compensate instructors US$1,500 per tutorial. If you have any questions, please contact [EMAIL PROTECTED] Greg Lindstrom Tutorial Coordinator, PyCon 2009 (US) ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] unable to import Image module from my application
ShivKumar Anand wrote:
I am using Python Image library on windows and it is running well.
I am using RHEL E4 on another machine and when I installed
"python-imaging-1.1.6-2.el4.rf.i386.rpm", still i am not able to call
the Image and ImagOps modules from my application on this Linux machine.
After that --I manually added Imaging1.1.4 folder in
/usr/lib/Python2.4/site-packages and added entry in easy_install.pth.
After that, I am able to import the modules from python prompt, but
still I am not able to import from my application.
It's likely you've still got a path issue. When you import from the
command line the contents of your current directory is importable. I'd
suspect you were in the PIL directory when you tested from the command line.
To verify a path problem, add
sys.path.append('/usr/lib/Python2.4/site-packages//usr/lib/Python2.4/site-packages')
prior to the import in your application. If that works, double check
your path setup.
HTH,
Emile
I am not able to figure out the exact reason for this.
Kindly guiide me.
Thanks in anticipation.
Shiv
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Re: [Tutor] Idle and windows XP firewall
The program does not start up. I think it is a firewall issue but I am having problems changing my firewall to allow idle. --- On Wed, 1/10/08, Kent Johnson <[EMAIL PROTECTED]> wrote: From: Kent Johnson <[EMAIL PROTECTED]> Subject: Re: [Tutor] Idle and windows XP firewall To: [EMAIL PROTECTED] Date: Wednesday, 1 October, 2008, 11:35 AM On Wed, Oct 1, 2008 at 5:04 AM, David Holland <[EMAIL PROTECTED]> wrote: > At work I have windows XP service pack 3 and although I have sys admin I can > not use idle. > I have googled but no success - any ideas? What problem are you having? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Idle and windows XP firewall
Why would your firewall be blocking idle? Does idle connect to the internet? On Wed, Oct 1, 2008 at 8:21 AM, David Holland <[EMAIL PROTECTED]>wrote: > The program does not start up. I think it is a firewall issue but I am > having problems changing my firewall to allow idle. > > --- On *Wed, 1/10/08, Kent Johnson <[EMAIL PROTECTED]>* wrote: > > From: Kent Johnson <[EMAIL PROTECTED]> > Subject: Re: [Tutor] Idle and windows XP firewall > To: [EMAIL PROTECTED] > Date: Wednesday, 1 October, 2008, 11:35 AM > > On Wed, Oct 1, 2008 at 5:04 AM, David Holland <[EMAIL PROTECTED]> > wrote: > > At work I have windows XP service pack 3 and although I have sys admin I > can > > not use idle. > > I have googled but no success - any ideas? > > What problem are you having? > > > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > > -- To be considered stupid and to be told so is more painful than being called gluttonous, mendacious, violent, lascivious, lazy, cowardly: every weakness, every vice, has found its defenders, its rhetoric, its ennoblement and exaltation, but stupidity hasn't. - Primo Levi ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Text Scatter Plots?
> Is there a text graphics module that does say scatter plots or
> histograms? I'm thinking of stuff prior to the graphics era of
> computing. I'm looking for something really simple.
Here's a quick and dirty way to do basic histogram of dice rolls:
import random
rolls={}
for x in range(1):
a = [random.randint(1,10) for x in range(2)]
v = sum(a)
try:
rolls[v] += 1
except KeyError:
rolls[v] = 1
m = max(rolls.values())
stretch = (m/70.0)
for x in rolls.keys():
print x, rolls[x], '*' * ( int(rolls[x] / stretch) )
___
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Re: [Tutor] Idle and windows XP firewall
On W W wrote: > > Message: 6 > Date: Wed, 1 Oct 2008 08:46:50 -0500 > From: "W W" <[EMAIL PROTECTED]> > Subject: Re: [Tutor] Idle and windows XP firewall > To: [EMAIL PROTECTED] > Cc: tutor python > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > Why would your firewall be blocking idle? Does idle connect to the > internet? No, but since IDLE itself is written in Python, it use a really weird way to communicate with the python process. I don't know the details of that really weird way, but it involves the possibility of a firewall blocking IDLE. The safe way if you can't configure firewall is to open IDLE without subprocess. > On Wed, Oct 1, 2008 at 8:21 AM, David Holland > <[EMAIL PROTECTED]>wrote: (snip) > > > > > > > > ___ > > Tutor maillist - Tutor@python.org > > http://mail.python.org/mailman/listinfo/tutor > > > > > > > -- > To be considered stupid and to be told so is more painful than being > called > gluttonous, mendacious, violent, lascivious, lazy, cowardly: every > weakness, > every vice, has found its defenders, its rhetoric, its ennoblement and > exaltation, but stupidity hasn't. - Primo Levi > -- next part -- > An HTML attachment was scrubbed... > URL: > <http://mail.python.org/pipermail/tutor/attachments/20081001/1dc0aa03/attachment.htm> > > -- > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] unable to import Image module from my application
Emile van Sebille wrote:
To verify a path problem, add
sys.path.append('/usr/lib/Python2.4/site-packages//usr/lib/Python2.4/site-packages')
erhhmmm...
sys.path.append('/usr/lib/Python2.4/site-packages/Imaging1.1.4')
EvS
___
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[Tutor] sample python twill scripts?
Just wondering if anyone here would be interested in sharing a python twill script? I'd just like to take a gander at how others are engineering their scripts. Thanks, JJ Disclaimer: The information contained in this transmission, including any attachments, may contain confidential information of Panasonic Avionics Corporation. This transmission is intended only for the use of the addressee(s) listed above. Unauthorized review, dissemination or other use of the information contained in this transmission is strictly prohibited. If you have received this transmission in error or have reason to believe you are not authorized to receive it, please notify the sender by return email and promptly delete the transmission. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Idle and windows XP firewall
"W W" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] Why would your firewall be blocking idle? Does idle connect to the internet? It connects to itself via a socket. But I thought that problem had been fixed several releases ago... On Wed, Oct 1, 2008 at 8:21 AM, David Holland <[EMAIL PROTECTED]>wrote: The program does not start up. I think it is a firewall issue but I am having problems changing my firewall to allow idle. Which version of Python are you using? Alan G. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] python: can't open file 'test.py' : [Errno 2] No such file or directory
If you're right about having to give the full path, and I suspect you are, Then this means that python knows to search the currennt working directory for the file to execute, but nowhere else. Correct, just like every other program. If you run notepad foo.txt notepad will open a new foo.txt in the current folder it will not search your drive to find some other foo.txt that you created prevbiously. Why would python be any different? I didn't realize other program were also behaving that way, I don't work much with the command prompt anymore :-) The trick to do what you want is not to execute python but to execute the script and allow the OS to associate Python with it. That is what I was missing, C:\test.py will execute. So either just type the script name into the prompt (assuming it is on the PATH) or double click in explorer and Windows will find Python itself. HTH, It sure does, thanks everybody for the great replies, ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] (no subject)
kayla bishop wrote: ok i imported the random module and set it up with a 2... i can't get it to loop correctly to where it keeps going until the total of heads and tails is 100> Date: Wed, 1 Oct 2008 00:18:51 -0400> From: [EMAIL PROTECTED]> CC: tutor@python.org> Subject: Re: [Tutor] (no subject)> > kayla bishop wrote:> > I can't figure out how to write a program where you flip a coin 100 times and it keeps track of how many heads and tails you flipped but it has to be random. Can you please help> > Hi Kayla, Have you read the other posts on the list? bhaaluu sent you a great little tutorial showing how a pro would go about solving this problem. Read it carefully, it's really worth all the time you will spend on it. Your problem seems to be that you expect the random module to return a 100 answers, it won't. Random returns only one choice for everytime you run it. That's why we use a loop, to run random a 100 times. Don't despair, in the beginning everybody trips on silly details like that, keep at it and soon you'll be the expert. Kent, I didn't realize the list had a policy, I'm sorry for breaking it. Were can I read it? ignorance not being an excuse. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] (no subject)
Correction of post typo follows. On Wed, Oct 1, 2008 at 8:57 AM, bhaaluu <[EMAIL PROTECTED]> wrote: > > #Now, let's flip the coin (PROCESS). > > while count != 0: >#each time through the loop, flip will randomly choose a side of the coin >flip = random.choice(coin) >#if/else selection. There are only two choices. >if flip == "heads": >heads += 1 >else: >tails += 1 >#decrement the counter, or you'll be in an infinite loop >#it started at 100, so subtract one each iteration >count -= 1 > > Not the indentation after the while loop line. > That's a Python thing. That should be "NOTE the indentation after the while loop". Also note the indentation after the if and else lines. Python uses indentation to define 'blocks' of code. Another little detail that may escape one's notice is that the first line of each block ends with a colon. A block is finished when the indentation ends. Blocks of code may be nested within each other, as long as they are properly indented. > > Since I've put so much time into this tutorial, I have a > challenge for you: Write a program that rolls a pair of > ten-sided dice, and tell me what the outcome of the roll is? > How about the outcome of three rolls? > The programming challenge still stands! Kayla? (BTW, when I say "tell me what the outcome is", I'm asking for your program to produce some OUTPUT!) Happy [Python] Programming! -- b h a a l u u at g m a i l dot c o m Kid on Bus: What are you gonna do today, Napoleon? Napoleon Dynamite: Whatever I feel like I wanna do. Gosh! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Finding the "streaks" in heads/tails list
Hello, I thought it'd be cool to write a program for my logic/critical thinking class, and right now we're evaluating randomness - and the deception of it. A previous post inspired it - coin flipping. So, I've written a program that flips a coin 1000 times and records it all in a dictionary, like this: # 0 = heads, 1 = tails flips = [0,0,0,1,0,1,0,0,1,1,1,1,1,0,0,1,0,1,0,1,0,1] What I want to do, is find out the largest "streak" of digits. In the above example, the streak would be 5, because there are 5 tails flips in a row. I've thought about this, and it seems like regular expressions would be needed. Can someone help/hint? Thanks in advance! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] (no subject)
On Wed, Oct 1, 2008 at 4:15 PM, Pierre Dagenais <[EMAIL PROTECTED]> wrote: > I didn't realize the list had a policy, I'm sorry for breaking it. Were can > I read it? ignorance not being an excuse. Hmm, it doesn't seem to be written down. I'll have to add it to the list info page and the welcome message. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Finding the "streaks" in heads/tails list
On Wed, Oct 1, 2008 at 4:56 PM, Alec Henriksen <[EMAIL PROTECTED]> wrote: > Hello, > > I thought it'd be cool to write a program for my logic/critical thinking > class, and right now we're evaluating randomness - and the deception of > it. A previous post inspired it - coin flipping. > > So, I've written a program that flips a coin 1000 times and records it > all in a dictionary, like this: > > # 0 = heads, 1 = tails > flips = [0,0,0,1,0,1,0,0,1,1,1,1,1,0,0,1,0,1,0,1,0,1] > > What I want to do, is find out the largest "streak" of digits. In the > above example, the streak would be 5, because there are 5 tails flips in > a row. > > I've thought about this, and it seems like regular expressions would be > needed. Regular expressions are for processing strings, not loops. I would loop through the list with a for loop, keeping track of the last value seen and the current count. If the current value is the same as the last, increment the count; if it is different, reset the count. You don't actually have to put the flips into a list, you could count the runs directly as you make the flips. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] newbee needs direction
Here is my problem and my coding knowledge consists of html. I have all the time in the world to play with this so I thought I would at least ask how to get started. I want to create a web base program that would output team standings. The only given will be the names of each team and their division (ie: division 1, division 2). What will be supplied is the score of an event (game played between 2 teams), and weather it is a division game (two teams in the same division playing each other) or out of division game (two teams in different divisions playing each other). The out- put will then be, the team with the highest percent of winnings will show up at the top of a list and the worst win/loss percentage team will show up at the bottom of a list. Also, for out-put, their will be a total of 7 columns beside each team name. 4 columns for Division play, a win column, a loss column, a tie column and then the win/loss percentage column. then their will be 3 columns for Non-Division play, a win column, a loss column, a tie column. So, based on an entered score, a number will be added to one of the columns, the win column, loss column or tie column and will also be used to compute a win/loss percentage. The win loss percentage will be total games won, divided by total games played (ie: A team that is 3-2 has a .600 win percentage because 3 divided by five equals .600). For ties you would have to Add up the number of wins and half the number of ties, and divide by the total number of games played. (ie: For instance, a team with a 10-5-1 record would have a 10.5/16 or .656 winning percentage). If a team plays in a non-division game it will have no barring to the standings unless their are two or more teams with the same record. Therefore, if 2 teams have the same division wins (win/loss percentage) but one team has more non-division wins, that team should show up higher on the list. I would also like that all teams' scores would have to be added before a standings change would be calculated and made week to week. However, their might have to be a "bye" button or just add zeros, in case a particular team does in fact have a bye while other teams play. Also, this way I will know which teams need their scores to be added. I will most likely be adding the scores to an admin page and the results will them be posted on a website. OK... how should I get started and how tough will this be? Thanks, Mike ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Finding the "streaks" in heads/tails list
> Regular expressions are for processing strings, not loops.
>From a theoretical point of view, this isn't quite true: regular
expressions can deal with sequences of things. It's true that most
regular expression libraries know how to deal only with characters,
but that's a matter of specializing the library for efficiency, and
not a general property of regexes.
But what regular expressions (i.e. finite-state automata) can't do
very well is count with memory, and the task you're asking for is
fundamentally an anti-regexp one.
> I would loop through the list with a for loop, keeping track of the
> last value seen and the current count. If the current value is the
> same as the last, increment the count; if it is different, reset the
> count.
Agreed. This seems direct.
If we want to be cute, we can also use the itertools.groupby()
function to do the clumping of identical sequential values for us.
For example:
#
>>> for group in itertools.groupby('caaabcc'):
... print group[0], len(list(group[1]))
...
a 4
b 4
c 1
a 3
b 1
a 4
c 2
#
See the standard library documentation for more details on itertools.groupby():
http://www.python.org/doc/lib/itertools-functions.html
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Re: [Tutor] Finding the "streaks" in heads/tails list
On Wed, Oct 1, 2008 at 6:00 PM, Danny Yoo <[EMAIL PROTECTED]> wrote:
>> Regular expressions are for processing strings, not loops.
>
> From a theoretical point of view, this isn't quite true: regular
> expressions can deal with sequences of things.
Sheesh! OK, *Python* regular expressions are for processing strings :-)
> If we want to be cute, we can also use the itertools.groupby()
> function to do the clumping of identical sequential values for us.
> For example:
>
> #
for group in itertools.groupby('caaabcc'):
> ... print group[0], len(list(group[1]))
Hmm, I smell a one-liner here:
max(len(list(group[1])) for group in itertools.groupby('caaabcc'))
Kent
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Re: [Tutor] Finding the "streaks" in heads/tails list
"Kent Johnson" <[EMAIL PROTECTED]> wrote What I want to do, is find out the largest "streak" of digits. In the above example, the streak would be 5, because there are 5 tails flips in a row. I would loop through the list with a for loop, keeping track of the last value seen and the current count. If the current value is the same as the last, increment the count; if it is different, reset the count. You need to store the count before resetting it since you want to know the largest value of count over the list. Or at least keep a separate max variable that you update if count > max. But as Kent also said the easiest way is probably to just track the runs and their count as the data is generated rather than waiting till the end and post-processing the results. HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] newbee needs direction
"Michael yaV" <[EMAIL PROTECTED]> wrote Here is my problem and my coding knowledge consists of html. OK, The first step is to pause your project long enough to learn the basics of programming - with Python since you are asking on a Python list! :-) I want to create a web base program that would output team standings. The second stage is to write the program as a non web application first. Keeping the novelty factors down helps when learning to program! The only given will be the names of each team and their division (ie: division 1, division 2). What will be supplied is the score of an event (game played between 2 teams), and weather it is a division game (two teams in the same division playing each other) or out of division game (two teams in different divisions playing each other). Sounds OK so far. The output will then be, the team with the highest percent of winnings will show up at the top of a list and the worst win/loss percentage team will show up at the bottom of a list. Also, for out-put, their will be a total of 7 columns beside each team name. 4 columns for Division play, a win column, a loss column, a tie column and then the win/loss percentage column. then their will be 3 columns for Non-Division play, a win column, a loss column, a tie column. A good idea when trying to define this kind of thing is to produce a sample output form - in html since you know it already. < lots more snipped> OK... how should I get started and how tough will this be? Its a pretty good aspirational beginners project. Not too hard for a newbie and easy enough to chunk up into bite sized morsels. But first focus on getting the basics of Python programming clear because otherwise you will wind up getting the details of your problem all mixed up with the details of Python! Stick to solving one problem at a time, so take a week or so out to learn Python basics. Then go back to the problem and focus on building a command line solution first. Once thats done its relatively easy to convert it for the web. For learning Python pick one of the Non Programmers tutorials on the Python web site and follow it through. [ If you pick mine to only need to go as far as the end of the Basics section before returning to your problem...] HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] newbee needs direction
Thanks Alan. On Oct 1, 2008, at 8:37 PM, Alan Gauld wrote: "Michael yaV" <[EMAIL PROTECTED]> wrote Here is my problem and my coding knowledge consists of html. OK, The first step is to pause your project long enough to learn the basics of programming - with Python since you are asking on a Python list! :-) I want to create a web base program that would output team standings. The second stage is to write the program as a non web application first. Keeping the novelty factors down helps when learning to program! The only given will be the names of each team and their division (ie: division 1, division 2). What will be supplied is the score of an event (game played between 2 teams), and weather it is a division game (two teams in the same division playing each other) or out of division game (two teams in different divisions playing each other). Sounds OK so far. The output will then be, the team with the highest percent of winnings will show up at the top of a list and the worst win/loss percentage team will show up at the bottom of a list. Also, for out-put, their will be a total of 7 columns beside each team name. 4 columns for Division play, a win column, a loss column, a tie column and then the win/loss percentage column. then their will be 3 columns for Non-Division play, a win column, a loss column, a tie column. A good idea when trying to define this kind of thing is to produce a sample output form - in html since you know it already. < lots more snipped> OK... how should I get started and how tough will this be? Its a pretty good aspirational beginners project. Not too hard for a newbie and easy enough to chunk up into bite sized morsels. But first focus on getting the basics of Python programming clear because otherwise you will wind up getting the details of your problem all mixed up with the details of Python! Stick to solving one problem at a time, so take a week or so out to learn Python basics. Then go back to the problem and focus on building a command line solution first. Once thats done its relatively easy to convert it for the web. For learning Python pick one of the Non Programmers tutorials on the Python web site and follow it through. [ If you pick mine to only need to go as far as the end of the Basics section before returning to your problem...] HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor Michael Waltemeyer (yaVarsity) [EMAIL PROTECTED] ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
