Re: [Tutor] While Loops: Coin Flip Game :p:
Hi there,
This is the Code. Please check it.It is working fine.
>>>import random
>>>headsCount = 0
>>>tailsCount = 0
>>>count = 1
>>>
>>>while count <= 100:
>>> coin = random.randrange(2)
>>> if coin == 0:
>>> headsCount += 1
>>> else:
>>> tailsCount += 1
>>> count += 1
>>>
>>>print "The number of heads was", headsCount
>>>print "The number of tails was", tailsCount
>>>
>>>raw_input("\n\nPress the enter key to exit.")
*
Your Description *:
On Tue, Nov 16, 2010 at 1:25 PM, Dave Angel wrote:
> When I run this code (I'm also a noob) I get this result:-
>>
>> [evaluate lines 1-22 from untitled-1.py]
>
The number of heads was 73
>> The number of tails was 100
>>
>> Press the enter key to exit.
>>
>> # Surely, if flipping a single coin 100 times your total number of heads
>> and
>> tails should add up to 100
>> # not 173 or am I missing the point?
>>
>>
>> No, you're missing an indentation. If you check the code you're running,
> I think you'll find that you didn't unindent the line incrementing count.
>
> Of course, it's less error prone to simply use
> for count in xrange(100):
>
> instead of while count < 100:
>
> and you wouldn't need to increment count.
>
> DaveA
>
>
--
With Regards,
Nithya S
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Re: [Tutor] While Loops: Coin Flip Game :p:
Arrr thats better Nithya it works fine now. I had it working fine before it
was just coming up with that strange result of 73 and 100
when I copied the code into wing to check it out in order to understand it.
Wing picked up the spacing and I had already corrected
that Dave as I was simply looking at Nithya code.
On 16 November 2010 19:10, Nithya Nisha wrote:
> Hi there,
>
> This is the Code. Please check it.It is working fine.
>
> >>>import random
> >>>headsCount = 0
> >>>tailsCount = 0
> >>>count = 1
> >>>
> >>>while count <= 100:
> >>> coin = random.randrange(2)
> >>> if coin == 0:
> >>> headsCount += 1
> >>> else:
> >>> tailsCount += 1
> >>> count += 1
> >>>
> >>>print "The number of heads was", headsCount
> >>>print "The number of tails was", tailsCount
> >>>
> >>>raw_input("\n\nPress the enter key to exit.")
>
>
>
> *
> Your Description *:
>
> On Tue, Nov 16, 2010 at 1:25 PM, Dave Angel wrote:
>
>> When I run this code (I'm also a noob) I get this result:-
>>>
>>> [evaluate lines 1-22 from untitled-1.py]
>>
> The number of heads was 73
>>> The number of tails was 100
>>>
>>> Press the enter key to exit.
>>>
>>> # Surely, if flipping a single coin 100 times your total number of heads
>>> and
>>> tails should add up to 100
>>> # not 173 or am I missing the point?
>>>
>>>
>>> No, you're missing an indentation. If you check the code you're
>> running, I think you'll find that you didn't unindent the line incrementing
>> count.
>>
>> Of course, it's less error prone to simply use
>> for count in xrange(100):
>>
>> instead of while count < 100:
>>
>> and you wouldn't need to increment count.
>>
>> DaveA
>>
>>
>
>
> --
> With Regards,
> Nithya S
>
>
--
Luke Pettit
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Re: [Tutor] new turtle module
On Fri, Oct 8, 2010 at 1:11 AM, Alan Gauld wrote: > > "roberto" wrote > >> is it correct to overwrite the turtle.py and turtle.pyc files > > I'd overwrite the .py file but get Python to generate a new .pyc for you > just to ensure compatibility. > > just type import turtle at the >>> prompt. > thanks it works -- roberto ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] While Loops: Coin Flip Game :p:
Thankyou..!!!
Regards,
Nithya
On Tue, Nov 16, 2010 at 1:51 PM, Luke Pettit wrote:
> Arrr thats better Nithya it works fine now. I had it working fine before
> it was just coming up with that strange result of 73 and 100
> when I copied the code into wing to check it out in order to understand it.
> Wing picked up the spacing and I had already corrected
> that Dave as I was simply looking at Nithya code.
>
>
> On 16 November 2010 19:10, Nithya Nisha wrote:
>
>> Hi there,
>>
>> This is the Code. Please check it.It is working fine.
>>
>> >>>import random
>> >>>headsCount = 0
>> >>>tailsCount = 0
>> >>>count = 1
>> >>>
>> >>>while count <= 100:
>> >>> coin = random.randrange(2)
>> >>> if coin == 0:
>> >>> headsCount += 1
>> >>> else:
>> >>> tailsCount += 1
>> >>> count += 1
>> >>>
>> >>>print "The number of heads was", headsCount
>> >>>print "The number of tails was", tailsCount
>> >>>
>> >>>raw_input("\n\nPress the enter key to exit.")
>>
>>
>>
>> *
>> Your Description *:
>>
>> On Tue, Nov 16, 2010 at 1:25 PM, Dave Angel wrote:
>>
>>> When I run this code (I'm also a noob) I get this result:-
[evaluate lines 1-22 from untitled-1.py]
>>>
>> The number of heads was 73
The number of tails was 100
Press the enter key to exit.
# Surely, if flipping a single coin 100 times your total number of heads
and
tails should add up to 100
# not 173 or am I missing the point?
No, you're missing an indentation. If you check the code you're
>>> running, I think you'll find that you didn't unindent the line incrementing
>>> count.
>>>
>>> Of course, it's less error prone to simply use
>>> for count in xrange(100):
>>>
>>> instead of while count < 100:
>>>
>>> and you wouldn't need to increment count.
>>>
>>> DaveA
>>>
>>>
>>
>>
>> --
>> With Regards,
>> Nithya S
>>
>>
>
>
> --
> Luke Pettit
>
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Re: [Tutor] program hangs in while loop using wx.yield
Hi Terry - I am an alumni of UCSC (University of California, Santa Cruz) and
live really close so I can request books throughout the UC system just like
you describe and there is no limit - or maybe an extremely high limit - to
the number of books I can check out from McHenry Library. It is so worth
paying alumni dues! There is no way they would transport books to the
public library to make it easier for people though - not with the way the
city and the university feel about each other :}
And discounts on courses through the University Extension program. That is
how I found out about - and took - the online Python for Programmers course.
Though I wasn't really happy with it and went on to listen to the Google
website video - that guy was very clear and helpful I forgot his name. And
then I went through Alan Gauld's tutorial which also helped.
By coincidence I am still working on my own function where I want to display
a picture and some text and have a timer so that it stays on screen for a
specific amount of time and then I go on to close that out and redraw the
screen. I am working with the Tkinter documentation and trying to
understand. I tried a couple tests just adding a few lines to my own
program that didn't accomplish exactly what I want, so planning to type in
very simple examples from the doc, observe that and then go back to my own
code.
If I just can't figure out how to do this with Tkinter and the Python
Imaging Library, is 'wxPython' the additional software I would want to
install and try with? Is its purpose to make GUI event programming easier
(that would mean the defaults provided are difficult, right? So I shouldn't
feel bad about being confused?) If so, can someone explain these additional
software packages out there? I mean are they coming from some third
companies? And why? If the software is free. I'm not understanding the
history or business part of these Python modules and libraries. Isn't there
one organization who is discussing or approving standards for this language?
Regards,
Patty
- Original Message -
From: "Terry Carroll"
To:
Sent: Monday, November 15, 2010 11:37 PM
Subject: Re: [Tutor] program hangs in while loop using wx.yield
On Sun, 14 Nov 2010, Alex Hall wrote:
Is there a basic tutorial for this sort of thing?
Chapter 3 ("Working in an event-driven environment") of the book "wxPython
in Action" is a pretty good tutorial on event-driven GUI programming in
wxPython. The book in general is pretty good; I no longer buy many
computer books, but this one was worth it.
If you don't want to buy it, if you're in the U.S., you can go to
http://www.worldcat.org/oclc/67122432 and plug in your zip code to see if
a library near you[1] has it.
[1] or a library that has inter-library loan arrangements with a library
near you. I'm currently reading "Essential SQLAlchemy," courtesy of the
San Diego State University library. My local library (San Jose Public
Library) borrowed it from SDSU and then lent it to me. It's kind of cool
that one library will send a book 400 miles to another, just because I'm
too cheap to buy a copy and asked for it.
Apologies to anyone at SDSU who's learning SQLAlchemy and wondering why
they can't find this book in their library.
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[Tutor] wxPython, Tkinter (was: program hangs in while loop using wx.yield
On Tue, 16 Nov 2010, Patty wrote: Hi Terry - I am an alumni of UCSC (University of California, Santa Cruz) and live really close so I can request books throughout the UC system just like you describe and there is no limit - or maybe an extremely high limit - to the number of books I can check out from McHenry Library. It is so worth paying alumni dues! There is no way they would transport books to the public library to make it easier for people though - not with the way the city and the university feel about each other :} You might be surprised. I would't have expected to get a book from San Diego State University sent to the San Jose Public Library, but it did. I just entered teh request, and a few hours later, I had anote saying it was on the way. The system finds the copy and obtains it. It's not on a one-to-one basis, i.e., as if SJPL had an arrangement with SDSU; it's more of the libraries deciding to patricipate in the pool. If I just can't figure out how to do this with Tkinter and the Python Imaging Library, is 'wxPython' the additional software I would want to install and try with? wxPython is an alternative to Tkinter. The advantage of Tkinter is that it comes as part of standard Python. You know that it will be installed on any reasonably current Python installation. If you write a program using Tkinter and send it to me, you can be sure that I can run it as long as I have Python installed (at least as far as the GUI is concerned; other things such as PIL might still be an issue). wxPython is an API over the cross-platform wxWidgets GUI. I think it provides a cleaner and more native look compared to Tkinter. For what my opinion is work (and that's not much -- I'm pretty inexperienced at GUI stuff), I find it at least as easy to use as Tkinter, but I recall a learning curve when I started. I don't use Tkinter any more, preferring wxPython, but opinions will vary. Here's a comparison of the two; it's hosted on a wxPython site, so it's undoubtedly slanted toward wxPython: http://wiki.wxpython.org/Choosing%20wxPython%20over%20Tkinter Another couple: http://www.llaisdy.com/static/tech/python/calc.html http://ojs.pythonpapers.org/index.php/tpp/article/viewArticle/61 However, if you would like an example of using Tkinter with PIL, I would be happy to provide you with a very rough program I wrote several years ago for my own use (when I still used Tkinter). It loads an image that was taken with a digital camera; reads the date the photo was taken from the image's EXIF data; adds a timestamp to the photo, and saves it. It's very rough; I have the habit of writing something only to the point where it's good enough for me, and then stop development on it. But you might find it helpful of a straightforward program that uses both. It's from about 2006 or so, and I am by no means a GUI programming expert and was even less so then, so my techniques may be suspect; but I'd be happy to send it to you for what it's worth. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] program hangs in while loop using wx.yield
Not wanting to hijack Terry's conversation, but for what it's worth: On 16 November 2010 18:08, Patty wrote: > If I just can't figure out how to do this with Tkinter and the Python > Imaging Library, is 'wxPython' the additional software I would want to > install and try with? Is its purpose to make GUI event programming easier > (that would mean the defaults provided are difficult, right? So I shouldn't > feel bad about being confused?) If so, can someone explain these additional > software packages out there? I mean are they coming from some third > companies? And why? If the software is free. I'm not understanding the > history or business part of these Python modules and libraries. Isn't there > one organization who is discussing or approving standards for this language? > wxPython is a set of Python wrappers for the wxWidgets GUI component set. wxWidgets in turn is a set of C++ GUI wrapper controls that wraps the native GUI controls (e.g. edit boxes, memo boxes, drop downs, buttons, radio buttons, checkboxes, menu's and so on) on various platforms. Hence it thus provides a common set of classes/components/controls and effectively a common API for writing GUI based applications in a cross platform fashion, e.g. that target multiple platforms (e.g. Mac, Windows, Unix, Linux etc.) So, by using wxPython you can write applications knowing that your app should work pretty much unmodified on any system where wxWidgets is available/installed. wxWidgets as well as wxPython is open source, so the source is freely available and managed/supported by their respective development teams. For more see: http://www.wxwidgets.org/about/ http://www.wxpython.org/what.php You can download and install wxPython for Windows here (make sure to get the one corresponding to the version of Python that you have installed.): http://www.wxpython.org/download.php#stable You should also install the demo application and documentation. The demo application will give you an idea of what you can do and how to do it. As an aside, there are other similar (competing) libraries that one might use, e.g. GTK or QT for example (or for that matter TK), which needless to say also have Python wrappers. Which to use is largely a matter of context and taste, but suffice it to say wx is not a bad choice. It's however quite large, so don't expect it to all sink in overnight. (I certainly am no wx expert, I just know enough to be dangerous ;) ) As for Event driven programming, it takes a little getting used to if you're only used to normal "straight line" programs at this point, GUI programming adds its own set up of detail and complexity on top of the event-driven programming model (not least that it usually demands a relatively solid understanding of OO concepts), so don't feel bad if you're feeling confused. (You might want to read up/google "Event driven programming" and do some research and come back with more questions after you've tried a few things yourself.) That's my £0.01 worth anyway, Walter ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] While Loops: Coin Flip Game :p:
Greetings,
As a thread starter, I thought I should write the rewritten code I got that
others helped me get to, since this thread is still going on.
# Coin Flips# The program flips a coin 100 times and then# tells you the number
of heads and tailsimport random
print "\a"print "\tWelcome to 'Coin Flipper!'"print "\nI will flip a coin 100
times and then tell you"print "the number of heads and tails!\n"
# set the coinheadsCount = 0tailsCount = 0count = 1
while count <= 100:coin = random.randrange(2)if coin == 0:
headsCount += 1else:tailsCount += 1count += 1
print "The number of heads was", headsCountprint "The number of tails was",
tailsCount
raw_input("\n\nPress the enter key to exit.")
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Re: [Tutor] program hangs in while loop using wx.yield
"Patty" wrote then I went through Alan Gauld's tutorial which also helped. Glad to hear it :-) If I just can't figure out how to do this with Tkinter and the Python I can send some basic code if that would help... Imaging Library, is 'wxPython' the additional software I would want to install and try with? Is its purpose to make GUI event programming easier No, in fact it is similar in concept to Tkinter but works in a style more like most other GUI toolkits. It is also far more powerful with more widgets and more complex styling tools and support for printing(as in paper). Tkinter is catching up on the native look department through the new ttk widgets but wxWidgets are nativbe from the ground up so they will probably always look slightly more "natural". But for your application wxPython and Tkinter should wind up looking pretty much the same both in terms of code and end result,. feel bad about being confused?) If so, can someone explain these additional software packages out there? I mean are they coming from some third companies? And why? If the software is free. I'm not understanding the history or business part of these Python modules and libraries. Open source works like this: Somebody finds they need somethjing built so they build it. Then they think, maybe other people could use this, so they announce its availability (usually after polishing it a bit, adding some comments etc) Other people start using it, they ask for extra features, or they add some themselves and send it to the author. Gradually a core team of developers forms and they start publishing regular updates and bug fixes. It is all very organic and apparently disorganised but it works most of the time. Code that isn't very good but serves a need gradually gets improved - or eventually rewritten from scratch - and code that is not really needed tends to just wither and die from lack of support. Some projects grow into huge undertakings like GNU and Linux and OpenOffice etc. These might be sponsored by large (or small) companies providing their paid staff to contribute to the project because they find it critical to their business (so they want to ensure it stays viable) or they see strategic advantage - eg Sun's support for OpenmOffice as an alternative to MS Office... Most of Python and its modules come from such a background. one organization who is discussing or approving standards for this language? There is a community which is loosely organised and a process for submitting changes etc. How it works varies from project to project. You can see it all in action if you visit SourceForge the home of many OpenSource projects both large and small. But there is nothing like the formalised standards surrounding languages like C or COBOL or Java. HTH, -- Alan Gauld Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] While Loops: Coin Flip Game :p:
"Stephanie Dawn Samson" wrote
thought I should write the rewritten code I got that others helped
me get to
By applying a couple of other ideas that have been suggested you get
something shorter and arguably slightly clearer:
# Coin Flips
# The program flips a coin 100 times and then
# tells you the number of heads and tails
import random
print """
Welcome to 'Coin Flipper!'
I will flip a coin 100 times and then tell you
the number of heads and tails!
"""
headsCount = 0
for count in range(100):
if random.randrange(2): # returns 1/0 => true/False
headsCount += 1
print "The number of heads was", headsCount
print "The number of tails was", 100-headsCount
raw_input("\n\nPress the enter key to exit.")
And you could replace the whole for loop with a generator expression
if you really wanted to, but I suspect that is getting into advanced
territory for you at this stage...
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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Re: [Tutor] While Loops: Coin Flip Game :p:
Just for the heck of it: heads = sum(random.randrange(2) for i in range(100)) -- Bob Gailer 919-636-4239 Chapel Hill NC ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
