Re: [Tutor] Looking for suggestions - update
->Terry<- wrote: > Thanks for the reply Kent and others. I've made some > changes and the game is quite playable now. I've put > the new version online at the same links if anyone > wants to take a look. A few more ideas: - I think you missed my earlier suggestion about simplifying get_button(). - You have the same code in two places to initialize the board. Code duplication is a strong "code smell" and it's generally a good idea to eliminate it. In this case it would be easy to make a function to initialize the board and call it in two places. The function can return the new board which you can then assign to the state variable. - I think the program would benefit from having a Button class. Buttons have several different states and behaviours which could all be bundled into a class. The state of a button includes its location and whether it has a peg in it. The behaviours of a Button are draw, add or remove a peg, and hit testing. If you make this change I would expect that peg_coords and state would both be replaced by a list of Buttons. get_button() would look like this: def get_button(click): for button in buttons: if click in button: return button redraw_screen() would become def redraw_screen(): screen.blit(board, (0, 0)) # Draw board for button in buttons: button.draw(screen) pygame.display.update() return Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about serial coms
The device at the far end of the serial connection is echoing what you write back to you. This is a convenience for someone typing at a terminal, but a nuisance when you are programming. The easier way out is to turn echoing off at the far device. Failing that, you will want to provide a copy of your output to the read routine so that it can filter your output out of the data stream coming back to you. Unfortunately there is no reliable error detection on a serial line, so line errors can complicate the task of matching the echoes to your output. On Mon, 2005-11-14 at 17:04 -0800, Bennett, Joe wrote: > I have been working with pyserial. One question I have > is this. I have a loop that writes to the serial port > and then waits about 500ms and then reads from the > serial port. The first thing read from the serial port > is ALWAYS the data written to the serial port... I > must be missing something obvious, but I thuoght the > two buffers were separate... (snipped) > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor -- Lloyd Kvam Venix Corp ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Favourite modules - Wiki Was Re: TurboGears - and some issues
>>> Ismael Garrido <[EMAIL PROTECTED]> 11/14/2005 11:55 PM >>> Kent Johnson wrote: >Maybe we should start a thread of favorite addons. For me, Jason Orendorff's path module is definitely #1 on the list, probably followed by Fredrik Lundh's ElementTree. > http://www.jorendorff.com/articles/python/path/ > http://effbot.org/zone/element-index.htm > > A wonderful idea! I have created a wiki page in Python.org with a list of such 'favourite' modules. Please take a look: http://wiki.python.org/moin/UsefulModules I put some of the modules I could remember being praised here. I hope I didn't miss any (well, save for web frameworks, I haven't been paying much attention) I hope I haven't made a mess, it was my first edit into python's wiki. I wasn't sure where to stick it, so I added it under DevelopmentTools. I hope the page helps somebody! (Today I'm "hopey" :) Bye, Ismael +++ That is a good idea, and a nice page. Another would be to implement some "social tagging" as on del.icio.us. It's kind of a popularity contest, but that's really what's wanted here, I think. OTOH, the wiki is probably the first place anyone would look, and I saw most of the modules I already use, and I learned about a couple that look very promising. One that I use a lot is Amara (http://uche.ogbuji.net/tech/4suite/amara/manual) for making xml more pythonic. Not to take anything away from ElementTree, it's a fine package; but I find Amara easier to use. Some others that seem 'missing': PIL and NumPy. I didn't try to put it on the wiki page because I wanted the tutors to have a chance to comment first. Anyway, thanks for the page. I have it bookmarked! Ron ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Do I have to initialize TKInter before I can use it?
Hey Nathan
I think this is what you are looking for
Code Below
from Tkinter import *
import tkMessageBox
tkMessageBox._show("Windows Title","This is the
description",icon=tkMessageBox.INFO,type=tkMessageBox.OK)
###End of Code
Regards
Alberto
-Mensaje original-
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] En nombre de
Nathan Pinno
Enviado el: Martes, 15 de Noviembre de 2005 00:43
Para: 'Alan Gauld'; 'Tutor Mailing List'
Asunto: Re: [Tutor] Do I have to initialize TKInter before I can use it?
Alan and all,
I imported it, but its not there. I tried using the Message one found in it,
but I got an error message:
>>> import Tkinter
>>> tk = Tkinter.Tk()
>>> Tkinter.Message("Help","Help!")
Traceback (most recent call last):
File "", line 1, in -toplevel-
Tkinter.Message("Help","Help!")
File "D:\Python24\lib\lib-tk\Tkinter.py", line 2640, in __init__
Widget.__init__(self, master, 'message', cnf, kw)
File "D:\Python24\lib\lib-tk\Tkinter.py", line 1862, in __init__
BaseWidget._setup(self, master, cnf)
File "D:\Python24\lib\lib-tk\Tkinter.py", line 1840, in _setup
self.tk = master.tk
AttributeError: 'str' object has no attribute 'tk'
What does this mean, and how can I get it working?
Nathan
-Original Message-
From: Alan Gauld [mailto:[EMAIL PROTECTED]
Sent: November 14, 2005 9:35 PM
To: Nathan Pinno; Tutor Mailing List
Subject: Re: [Tutor] Do I have to initialize TKInter before I can use it?
Nathan,
> I am having problems. The latest error message I got was:
>tkMessageBox.showinfo("Hockey",
> NameError: name 'tkMessageBox' is not defined
A NameError means Python doesn't recognise the name.
Usually that's because either you didn't declare the variable or you forgot
to import the module or you spelled it wrong.
In this case I'd guess you forgot the import?
Python error messages are really quite helpful if you just stop and think
about what they are saying for a few minutes.
Alan G
Author of the learn to program web tutor
http://www.freenetpages.co.uk/hp/alan.gauld
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Re: [Tutor] tkFileDialog.Directory
Hello!
Michael Lange <[EMAIL PROTECTED]> wrote:
> I guess the tkFileDialog.Directory class isn't intended to be used
directly.
> Try tkFileDialog.askdirectory() instead.
> If there are problems with the grab state, try passing "parent=self.top"
to askdirectory().
That did it! Thanks a lot!
I would like to ask another question. I don't understand the exception
mechanism
of Python when running a Tkinter app. If an exception happens (it does
happen quite often
at the moment..), a traceback is written to the console while the Tk window
remains open
and the application is still running. This is not what I expected -- I
expected the application
would end. Why is that?
Is there a way to create an error handler for uncaught exceptions in Tkinter
apps?
In other words, can I change the behaviour from writing a traceback to the
console to
something else? Can I, for example, show a message box instead?
Here is a small example:
--- snip ---
import Tix
def raise_exception():
print 1/0
if __name__ == '__main__':
root = Tix.Tk()
root.title("Exception demo")
Tix.Button(root, text = "Don't press", command = raise_exception).pack()
try:
root.mainloop()
except:
print "An error has occured."
--- snip ---
The except part gets never executed.
Kind regards,
Karsten.
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[Tutor] [Fwd: Re: question about serial coms]
(Forwarding to the list.) -- Lloyd Kvam Venix Corp --- Begin Message --- Ya know, you're right!... Wow, I feel good about myself now..:) What I'll do is have the fist command be ECHO OFF and see what happens... Sorry about the waisted bandwidth, but thank you for bringing me back to reality... It's the simple stuff that will get ya! :) -Joe --- Python <[EMAIL PROTECTED]> wrote: > The device at the far end of the serial connection > is echoing what you > write back to you. This is a convenience for > someone typing at a > terminal, but a nuisance when you are programming. > > The easier way out is to turn echoing off at the far > device. Failing > that, you will want to provide a copy of your output > to the read routine > so that it can filter your output out of the data > stream coming back to > you. > > Unfortunately there is no reliable error detection > on a serial line, so > line errors can complicate the task of matching the > echoes to your > output. > > On Mon, 2005-11-14 at 17:04 -0800, Bennett, Joe > wrote: > > I have been working with pyserial. One question I > have > > is this. I have a loop that writes to the serial > port > > and then waits about 500ms and then reads from the > > serial port. The first thing read from the serial > port > > is ALWAYS the data written to the serial port... I > > must be missing something obvious, but I thuoght > the > > two buffers were separate... > (snipped) > > ___ > > Tutor maillist - Tutor@python.org > > http://mail.python.org/mailman/listinfo/tutor > -- > Lloyd Kvam > Venix Corp > > --- End Message --- ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Favourite modules - Wiki Was Re: TurboGears - and some issues
Ron Phillips wrote: >That is a good idea, and a nice page. Another would be to implement >some "social tagging" as on del.icio.us. It's kind of a popularity >contest, but that's really what's wanted here, I think. > I believe the guys at PyPI were trying to do something similar. They're trying to measure the "pythoness" of modules. I'm hoping this list to become more about helping find the favourite modules. Like, if you got to process XML, what's the first module that comes to your mind? (ElementTree or Amara, but surely not the SAX/DOM parsers that Python has in the Std library) > OTOH, the wiki >is probably the first place anyone would look, and I saw most of the >modules I already use, and I learned about a couple that look very >promising. > >One that I use a lot is Amara >(http://uche.ogbuji.net/tech/4suite/amara/manual) for making xml more >pythonic. > I added it to the list. Looks very promising. >Not to take anything away from ElementTree, it's a fine >package; but I find Amara easier to use. Some others that seem >'missing': PIL and NumPy. > Added PIL. Not sure about NumPy... How's the deal between SciPy and NumPy? Isn't one part of the other? >Anyway, thanks for the page. I have it bookmarked! > > Glad you liked it :) Ismael ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Looking for suggestions - update
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Today (Nov 15, 2005) at 6:08am, Kent Johnson spoke these wise words: - ->->Terry<- wrote: - ->> Thanks for the reply Kent and others. I've made some - ->> changes and the game is quite playable now. I've put - ->> the new version online at the same links if anyone - ->> wants to take a look. - -> - ->A few more ideas: - -> - ->- I think you missed my earlier suggestion about simplifying get_button(). I tried your suggestion for changing get_button() and changed it to: def get_button(click): # What peg was clicked? for i, peg in peg_coords: if click in peg: return i + 1 return 0 but got this error. Traceback (most recent call last): File "test.py", line 120, in ? sel1 = check_valid_start() # Verify valid start File "test.py", line 40, in check_valid_start but = get_button([x, y])# Determine which peg position 1-15 File "test.py", line 60, in get_button for i, peg in peg_coords: ValueError: too many values to unpack So I changed it back for now with plans to take a closer look again later. - ->- You have the same code in two places to initialize the board. Code duplication is a strong "code smell" and it's generally a good idea to eliminate it. In this case it would be easy to make a function to initialize the board and call it in two places. The function can return the new board which you can then assign to the state variable. Agreed. - ->- I think the program would benefit from having a Button class. Buttons have several different states and behaviours which could all be bundled into a class. The state of a button includes its location and whether it has a peg in it. The behaviours of a Button are draw, add or remove a peg, and hit testing. - -> - ->If you make this change I would expect that peg_coords and state would both be replaced by a list of Buttons. get_button() would look like this: - -> - ->def get_button(click): - -> for button in buttons: - ->if click in button: - -> return button - -> - ->redraw_screen() would become - -> - ->def redraw_screen(): - ->screen.blit(board, (0, 0)) # Draw board - ->for button in buttons: - ->button.draw(screen) - ->pygame.display.update() - ->return - -> - ->Kent Great! Thanks again for your suggestions and the link. Time to do more reading. There is so much to learn, but I'm gaining more confidence as I go. Have a good day! - -- Terry "Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind." -- Dr. Seuss -BEGIN PGP SIGNATURE- Version: GnuPG v1.2.7 (GNU/Linux) iD8DBQFDeht5QvSnsfFzkV0RArnoAJ9UufSi0F0kO+Nup5siQmeMK3FYKQCfbivF 0hGFSAiEeiZOZ40bV35k7dY= =NDW8 -END PGP SIGNATURE- ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] tkFileDialog.Directory
On Tue, 15 Nov 2005 17:03:24 +0100 (MET)
[EMAIL PROTECTED] wrote:
>
> I would like to ask another question. I don't understand the exception
> mechanism
> of Python when running a Tkinter app. If an exception happens (it does
> happen quite often
> at the moment..), a traceback is written to the console while the Tk window
> remains open
> and the application is still running. This is not what I expected -- I
> expected the application
> would end. Why is that?
>
> Is there a way to create an error handler for uncaught exceptions in Tkinter
> apps?
> In other words, can I change the behaviour from writing a traceback to the
> console to
> something else? Can I, for example, show a message box instead?
>
If you only want to see the traceback in your gui, I recommend using Pmw.
Pmw pops up a Text window that shows the complete traceback, it doesn't catch
the exception though.
> Here is a small example:
>
> --- snip ---
> import Tix
>
> def raise_exception():
> print 1/0
>
> if __name__ == '__main__':
> root = Tix.Tk()
> root.title("Exception demo")
>
> Tix.Button(root, text = "Don't press", command = raise_exception).pack()
>
> try:
> root.mainloop()
> except:
> print "An error has occured."
> --- snip ---
>
> The except part gets never executed.
>
That's because the error isn't in the mainloop() method.
Probably you meant something like
def raise_exception():
try:
print 1 / 0
except ZeroDivisionError:
print "An error has occured."
# or with a message box:
# tkMessageBox.showerror(message='ZeroDivisionError')
?
Thank god python is nice enough to raise the error where it actually happens;
imagine your example would work, you would never know *where* the error happened
nor could you create adequate handlers for different exceptions in different
situations.
I hope this helps
Michael
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[Tutor] Overloading comparisons
Hi all, I defined an object wich describes a video clip, like this class VideoSegment: def __init__(self, filename): # Attributes that have to be present self.filename = filename The thing is, I will define an array of these objects for a cache, and would like to keep that array having less than 1000 elements. Periodically I will check it, and remove the oldest element. suppose I have the modification time as an argument. self.time = os.stat(self.filename).st_mtime I can define the following for sorting the array: def __cmp__(self, other): """polymorph for comparisons""" if self.time < other.time: return -1 elif self.time > other.time: return 1 else: return 0 But then I want to test for existance doing if 'lala.avi' in myarray: and that has to be done by name. Is there any way this could work? My current __cmp__ of course treats objects with the same timestamp as identical objects. Any comments are greatly appreciates, maybe my OOP is just sloppy... Hugo ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Help me
Hi There, I am planning to start my career in computer programming.But i don't have specific resource(websire/book) to improve my basic computer programming skills.If you know any helpful resources,please let me know. Thanks in advance. Priya. Yahoo! FareChase - Search multiple travel sites in one click. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] saving project
>>If you do >> >>File... Save >> >>Then select the location for your file and just give it a name, a >'.py' >>extension will be added to the file. But don't do this from the interactive shell! You need to create a new file (File->New) first and type your code in there. HTH, Alan G ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Favourite Modules - wiki
I think the Wiki's a great idea. del.icio.us already has a Python tagged page: http://del.icio.us/tag/python Other pages I use are: http://mechanicalcat.net/pyblagg.html http://www.planetpython.org/ I've added a couple of things to the Wiki - SQLObject and RSPython Matt ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Overloading comparisons
I know it is rude to reply to myself. But I found the answer and wanted to share it. I did the following test: >>> class Lala: ... def __eq__(self, other): ... if self.name == other.name: ... return True ... ... def __cmp__(self, other): ... if self.time < other.time: ... return -1 ... elif self.time > other.time: ... return 1 ... else: ... return 0 ... >>> ins0 = Lala() >>> ins0.time = 11 >>> ins0.name = 'myname' >>> >>> >>> ins1 = Lala() >>> ins1.time = 10 >>> ins1.name = 'myname' >>> >>> ins1 == ins0 True >>> >>> ins0>> ins1>> >>> #See? They test correctly for greater and lesser than (time) ... #but they test equal as to time. ... >>> #I even tried sort, it works fine. The thing is to use the rich comparison functions. Hugo ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Overloading comparisons
> I defined an object wich describes a video clip, like this > > class VideoSegment: > def __init__(self, filename): > # Attributes that have to be present > self.filename = filename [some text cut] > I can define the following for sorting the array: [some code cut] > But then I want to test for existance doing > > if 'lala.avi' in myarray: [some text cut] Hi Hugo, Rather than directly use a list to hold those VideoSegments, you may want to make a separate VideoContainer. A quick and dirty approach would look something like this: # class VideoContainer: def __init__(self): self.segments = [] def addSegment(self, segment): self.segments.append(segment) self.segments.sort() def deleteOldest(self): ... def __contains__(self, segmentName): ... # The idea is to squirrel away the sorted list in this VideoContainer, and not expose that implementation detail directly to people. Why do we use a list? Why not a hash? Why does the list have to be sorted? Those are implementation details that we want to hide, just in case we have to change our mind on how to effectively hold those Segments. As far as the world's concerned, a VideoContainer is something that we can put VideoSegments in, and where we can drop old segments off. (And if your operations are limited to this, you might even use something like the 'heapq' module if you're concerned about efficiency. See: http://www.python.org/doc/lib/module-heapq.html for details.) It should be the container's responsibility to keep the segments sorted any time we add a new segment in. The container can also know how to check for segments by name (with the __contains__() function.) Trying to have VideoSegment.__cmp__() to somehow juggle both the sorting role and the existence checking role might not be a good idea. You're doing two distinct things, and I think they should be two different methods. And from a design perspective, I think that existence-checking method should go in a class like VideoContainer. Best of wishes! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Overloading comparisons
Hi Danny, That's nice. I do think I'm going this way I don't want the container to grow too big in memory, not bigger than 1k elements(it is a cache), but when deleting an element I need it to be the oldest files (again, because it is a cache) Thanks for the advice, I'm going this way. My OOP skills *are* sloppy... Hugo Danny Yoo wrote: > >>I defined an object wich describes a video clip, like this >> >>class VideoSegment: >> def __init__(self, filename): >> # Attributes that have to be present >> self.filename = filename > > ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help me
On Tue, 15 Nov 2005, sivapriya pasupathi wrote: > I am planning to start my career in computer programming.But i don't > have specific resource(websire/book) to improve my basic computer > programming skills.If you know any helpful resources,please let me know. Hi Priya, Welcome aboard! If you're looking for Python-specific resources, have you had a chance to look through the Python.org web site? There should be a lot of useful links from the Beginners Guide and the Non Programmers tutorial list: http://wiki.python.org/moin/BeginnersGuide http://wiki.python.org/moin/BeginnersGuide/NonProgrammers As far as books on paper, there's a good list here: http://wiki.python.org/moin/IntroductoryBooks I've used Learning Python, and from what I remember, it was a fine tutorial. Unfortunately, I came to Python with previous programming experience, so I might not be the best person to point out what books are friendly to people starting from scratch. *grin* Does anyone else have recommendations? ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Looking for suggestions - update
->Terry<- wrote: > Today (Nov 15, 2005) at 6:08am, Kent Johnson spoke these wise words: > - ->- I think you missed my earlier suggestion about simplifying get_button(). > > I tried your suggestion for changing get_button() and > changed it to: > > def get_button(click): # What peg was clicked? > for i, peg in peg_coords: > if click in peg: > return i + 1 > return 0 Ah, my mistake, should be for i, peg in enumerate(peg_coords): enumerate() is a very handy built-in, given a sequence it returns a sequence of pairs of (index, value) for each value in the list. Use it when you need the index of an item while iterating a sequence. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help me
> -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Danny Yoo > > On Tue, 15 Nov 2005, sivapriya pasupathi wrote: > > > I am planning to start my career in computer programming.But i don't > > have specific resource(websire/book) to improve my basic computer > > programming skills.If you know any helpful resources,please > let me know. > > Hi Priya, > > Welcome aboard! > [SNIP Danny's suggestions] > > Unfortunately, I came to Python with previous programming > experience, so I > might not be the best person to point out what books are friendly to > people starting from scratch. *grin* > > Does anyone else have recommendations? Python was my first programming language (I don't count PHP). I started learning about 4 years ago. I found the standard tutorial by Guido quite helpful. I had to read it a few times though, as it moves quite fast for a tutorial (for a raw beginner, at least). I also went through "How to Think Like a Computer Scientist". It is a great book that is freely available online. Finally, the interactive interpreter is sitting there just waiting for you to start typing stuff in. The help() and dir() functions are particularly helpful when playing around in the interpreter. Python Tutorial - http://docs.python.org/tut/tut.html How to Think Like a Computer Scientist - http://www.ibiblio.org/obp/thinkCSpy/ -also- The Python Cookbook - http://www.oreilly.com/catalog/pythoncook2/ Good luck and welcome to Python! Christian ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] question about ord
Hey there, i am using a script to change a byte into an integer like this: a = the byte value = ord(a) but i cant find the operation that can change it back to a byte. i am sure its easy, but i am missing how to do it. thanks for any tips sk ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about ord
nephish wrote: > Hey there, > i am using a script to change a byte into an integer > like this: > a = the byte > value = ord(a) > > but i cant find the operation that can change it back to a byte. chr() See http://docs.python.org/lib/built-in-funcs.html Kent -- http://www.kentsjohnson.com ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] question about ord
Hmm,
Never thought of doing it that way.
try -
import struct
a = theByte
value = ord(a)
theByteReloaded = struct.pack("i",value)
You nmay want to check the docs for the struct module at python.org on that
pattern.
Liam Clarke-Hutchinson
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of nephish
Sent: Wednesday, 16 November 2005 9:46 a.m.
To: tutor
Subject: [Tutor] question about ord
Hey there,
i am using a script to change a byte into an integer
like this:
a = the byte
value = ord(a)
but i cant find the operation that can change it back to a byte. i am sure
its easy, but i am missing how to do it.
thanks for any tips
sk
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Re: [Tutor] question about ord
chr(value)
>>> chr(ord('a')) == 'a'
True
On Tue, 2005-11-15 at 14:46 -0600, nephish wrote:
> Hey there,
> i am using a script to change a byte into an integer
> like this:
> a = the byte
> value = ord(a)
>
> but i cant find the operation that can change it back to a byte.
> i am sure its easy, but i am missing how to do it.
>
> thanks for any tips
>
> sk
>
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Lloyd Kvam
Venix Corp
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Re: [Tutor] question about ord
Thanks for all your help and the link,
looking at the docs right now.
slaute`
shawn
On Wed, 2005-11-16 at 10:05 +1300, Liam Clarke-Hutchinson wrote:
> Hmm,
>
> Never thought of doing it that way.
>
> try -
>
> import struct
>
> a = theByte
> value = ord(a)
> theByteReloaded = struct.pack("i",value)
>
> You nmay want to check the docs for the struct module at python.org on that
> pattern.
>
>
> Liam Clarke-Hutchinson
>
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
> Of nephish
> Sent: Wednesday, 16 November 2005 9:46 a.m.
> To: tutor
> Subject: [Tutor] question about ord
>
>
> Hey there,
> i am using a script to change a byte into an integer
> like this:
> a = the byte
> value = ord(a)
>
> but i cant find the operation that can change it back to a byte. i am sure
> its easy, but i am missing how to do it.
>
> thanks for any tips
>
> sk
>
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[Tutor] Creating Tkinter Menubars
Hi, I am testing the following Tkinter code (attached at the end of this message) by Fredrik Lundh on a Mac OS X 10.4.2 with Python version 2.3. I do get a root window, but it is totally blank without the desirable menubars such as File and Edit. What am I missing? Any help will be highly appreciated. Thanks, Joe = from Tkinter import * class AppUI(Frame): def __init__(self, master=None): Frame.__init__(self, master, relief=SUNKEN, bd=2) self.menubar = Menu(self) menu = Menu(self.menubar, tearoff=0) self.menubar.add_cascade(label="File", menu=menu) menu.add_command(label="New") menu = Menu(self.menubar, tearoff=0) self.menubar.add_cascade(label="Edit", menu=menu) menu.add_command(label="Cut") menu.add_command(label="Copy") menu.add_command(label="Paste") try: self.master.config(menu=self.menubar) except AttributeError: # master is a toplevel window (Python 1.4/Tkinter 1.63) self.master.tk.call(master, "config", "-menu", self.menubar) self.canvas = Canvas(self, bg="white", width=400, height=400, bd=0, highlightthickness=0) self.canvas.pack() root = Tk() app = AppUI(root) app.pack() root.mainloop() Get your own "800" number Voicemail, fax, email, and a lot more http://www.ureach.com/reg/tag ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help me
On 15/11/05, sivapriya pasupathi <[EMAIL PROTECTED]> wrote: Hi There, I am planning to start my career in computer programming.But i don't have specific resource(websire/book) to improve my basic computer programming skills.If you know any helpful resources,please let me know. Thanks in advance. Priya. I'd suggest Alan Gauld's tutorial as well, python was pretty much my first language (I don't count VB) and his tutorial really helped. http://www.freenetpages.co.uk/hp/alan.gauld/ ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] RTSP
Hi Does anyone know if there's any module able to download rtsp? Failing that, any command line app that could do the job? (Already tried with mplayer, it didn't work) I'm trying to download a series of streams automatically, I have already been able to open the page, parse all the links, and get to the rtsp:// address. But couldn't find any way to download them. Any suggestions greatly appreciated. Ismael ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Do I have to initialize TKInter before I can use it?
Albertito and all,
It worked! Thanks again!
Thanks for all the help!
Nathan Pinno,
Owner/operator of The Web Surfer's Store.
http://www.the-web-surfers-store.com/
MSN Messenger: [EMAIL PROTECTED]
Yahoo! Messenger: spam_swatter31
AIM: f3mighty
ICQ: 199020705
-Original Message-
From: Alberto Troiano [mailto:[EMAIL PROTECTED]
Sent: November 15, 2005 8:51 AM
To: 'Nathan Pinno'; 'Alan Gauld'; 'Tutor Mailing List'
Subject: RE: [Tutor] Do I have to initialize TKInter before I can use it?
Hey Nathan
I think this is what you are looking for
Code Below
from Tkinter import *
import tkMessageBox
tkMessageBox._show("Windows Title","This is the
description",icon=tkMessageBox.INFO,type=tkMessageBox.OK)
###End of Code
Regards
Alberto
-Mensaje original-
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] En nombre de
Nathan Pinno Enviado el: Martes, 15 de Noviembre de 2005 00:43
Para: 'Alan Gauld'; 'Tutor Mailing List'
Asunto: Re: [Tutor] Do I have to initialize TKInter before I can use it?
Alan and all,
I imported it, but its not there. I tried using the Message one found in it,
but I got an error message:
>>> import Tkinter
>>> tk = Tkinter.Tk()
>>> Tkinter.Message("Help","Help!")
Traceback (most recent call last):
File "", line 1, in -toplevel-
Tkinter.Message("Help","Help!")
File "D:\Python24\lib\lib-tk\Tkinter.py", line 2640, in __init__
Widget.__init__(self, master, 'message', cnf, kw)
File "D:\Python24\lib\lib-tk\Tkinter.py", line 1862, in __init__
BaseWidget._setup(self, master, cnf)
File "D:\Python24\lib\lib-tk\Tkinter.py", line 1840, in _setup
self.tk = master.tk
AttributeError: 'str' object has no attribute 'tk'
What does this mean, and how can I get it working?
Nathan
-Original Message-
From: Alan Gauld [mailto:[EMAIL PROTECTED]
Sent: November 14, 2005 9:35 PM
To: Nathan Pinno; Tutor Mailing List
Subject: Re: [Tutor] Do I have to initialize TKInter before I can use it?
Nathan,
> I am having problems. The latest error message I got was:
>tkMessageBox.showinfo("Hockey",
> NameError: name 'tkMessageBox' is not defined
A NameError means Python doesn't recognise the name.
Usually that's because either you didn't declare the variable or you forgot
to import the module or you spelled it wrong.
In this case I'd guess you forgot the import?
Python error messages are really quite helpful if you just stop and think
about what they are saying for a few minutes.
Alan G
Author of the learn to program web tutor
http://www.freenetpages.co.uk/hp/alan.gauld
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Re: [Tutor] RTSP
Ismael Garrido wrote: > Hi > > Does anyone know if there's any module able to download rtsp? > Failing that, any command line app that could do the job? (Already tried > with mplayer, it didn't work) > > I'm trying to download a series of streams automatically, I have already > been able to open the page, parse all the links, and get to the rtsp:// > address. But couldn't find any way to download them. Maybe something in the Python RTSP Proxy can help: http://www.onegoodidea.com/ Kent -- http://www.kentsjohnson.com ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Favourite modules - Wiki Was Re: TurboGears - and some issues
Ron Phillips schrieb: > A wonderful idea! I have created a wiki page in Python.org with a list > > of such 'favourite' modules. > Please take a look: > http://wiki.python.org/moin/UsefulModules Good idea! The GUI section might be problematic, though. I don't see that any of the main GUI alternatives (GTK,Qt,wxWindows,Tk,PythonCard,...) can claim a definite prefernce among the Python crowd and they are all more or less Pythonic (except maybe Tk). Probably better just to link to some other comprehensive list there. Maybe a section on Template engines (Cheetah)? And somewhere docutils belongs on that list, but i don't know where. Maybe source code documentation? But then you'd probably have to list epydoc, gendoc, etc. as well. Fact is, that there are a lot of domains, where a clear favourite or "standard" module has not emerged yet. E.g. audio, configuration file handling, HTML form generation/validation, postgres database access, and so on... Chris ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] new topic draft
Alan Gauld schrieb: > I've just added an incomplete draft copy of my latest tutorial topic > on using the Operating System from Python. The material that's > there discusses the role of the OS and looks at file handling > usng os/os.path/shutil etc. > > http://www.freenetpages.co.uk/hp/alan.gauld/tutos.htm "Most computer users know that their computer has an operating system [...]" I doubt that. Maybe you should say "Experienced computer users..." ;-) Chris ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Favourite modules - Wiki Was Re: TurboGears - and some issues
Christopher Arndt wrote: > Good idea! The GUI section might be problematic, though. I don't see that any > of the main GUI alternatives (GTK,Qt,wxWindows,Tk,PythonCard,...) can claim a > definite prefernce among the Python crowd and they are all more or less > Pythonic (except maybe Tk). Probably better just to link to some other > comprehensive list there. > > Maybe a section on Template engines (Cheetah)? > > And somewhere docutils belongs on that list, but i don't know where. Maybe > source code documentation? But then you'd probably have to list epydoc, > gendoc, > etc. as well. I think this page will be more useful as a list of favorites or things that beginners might want to take a look at than as an encyclopedic list - there are other places to list all the template engines, all the GUI toolkits, etc. Kent -- http://www.kentsjohnson.com ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
