Re: main window in tkinter app

[Christopher Subich]

William Gill wrote:
> O.K. I tried from scratch, and the following snippet produces an 
> infinite loop saying:
> 
>   File "C:\Python24\lib\lib-tk\Tkinter.py", line 1647, in __getattr__
>   return getattr(self.tk, attr)
> 
> If I comment out the __init__ method, I get the titled window, and print 
> out self.var ('1')
> 
> 
> import  os
> from Tkinter import *
> 
> class MyApp(Tk):
> var=1
> def __init__(self):
>   pass
> def getval(self):
>   return self.var
> 
> 
> app = MyApp()
> 
> app.title("An App")
> print app.getval()
> app.mainloop()

You're not calling the parent's __init__ inside your derived class.  I 
would point out where the Python Tutorial points out that you should do 
this, but it's not in the obvious place (Classes: Inheritance).

Python does -not- automagically call parent-class __init__s for derived 
classes, you must do that explicitly.  Changing the definition of your 
class to the following works:
 >>> class MyApp(Tk):
 var=1
 def __init__(self):
   Tk.__init__(self)
   pass
 def getval(self):
   return self.var

It works when you comment out __init__ because of a quirk in Python's 
name resolution.  As you'd logically expect, if you don't define a 
function in a derived class but call it (such as instance.method()), it 
will call the method from the base class.

You just proved that this works for __init__ methods also.  When you 
didn't define __init__ for your derived class, MyApp() called 
Tk.__init__(), which Does the Right Thing in terms of setting up all the 
specific Tkinter-specific members.
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Using SHFileOperation

[avishay]

Hi All,
I want to use SHFileOperation using Python and Win32 extentions, in
order to move a file to the trash can. The function itself can be
accessed by importing win32com.shell.shell. However, I cannot find
anywhere the SHFILEOPSTRUCT. This structure is mentioned in the
documentation of the Win32 extentions, but I can't find a way to access
it.
I would appreciate your help. If there's an alternative way to send a
file to the trash can, that can also help.

Best Regards
Avishay

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is a file open ?

[luis]

for root, dirs, files in os.walk(path):
for file in files:
   # ¿ is opened ?


Best regards

Luis
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Reg file uploading

[praba kar]

Dear All,
  I have doubt regarding file uploading.  When we
upload a file to the remote server we can get file
type through file extentions. How we can find out file
type  if a file doesn't have any extentions ?

with regards
PRabahar 






__
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Re: goto

[Sybren Stuvel]

Mike Meyer enlightened us with:
>> I dislike gotos because it is too easy to inadvertently create
>> infinite loops. <10 WINK; 20 GOTO 10>
>
> And it's impossible without them? 

I thought the same thing, but then I read it again and thought about
the "inadvertently". As soon as you see a "while True", you _know_
it's going to loop forever. As soon as you see a "goto 10", you don't.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
 Frank Zappa
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Web shop in Python

[Lad]

Does anyone know about an e-shop solution written in Python?
Thanks for reply
Lad.

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Re: Documentation bug: Python console behaviour changed

[Claudio Grondi]

>> 'Ctrl-Z' does not shut down the console but 'Ctrl-D' etc.
>> Usually means you have a readline package installed.
Right. Readline uninstalled, Ctrl-Z works again.

By the way:
After trying to take over readline support from Gary Bishop,
I have inbetween given up trying to fix readline behaviour on
international keyboards in Windows (mainly because the
Python 2.4 IDLE works for me best, so I don't need IPython
anymore).
I haven't digged very deep into it, but I mean, that the whole
code must be probably more or less entirely rewritten by
someone with experience in internationalization matters on
Windows (various keyboards and localized Windows
versions) and readline behaviour on *nix systems.
Up to now, there is noone known to me willing to support
the readline package - any volunteers?
Michele Simionato and me can then test the outcome on
German and Italian Windows systems and keyboards.

Claudio

"Tim Golden" <[EMAIL PROTECTED]> schrieb im Newsbeitrag
news:[EMAIL PROTECTED]
[Lucas Raab]
| Peter Hansen wrote:
| > Kay Schluehr wrote:
| >
| >> The documentation of the Python console behaviour is not correct
| >> anymore for Python 2.4.1. At least for the Win2K system
| I'm working on
| >> 'Ctrl-Z' does not shut down the console but 'Ctrl-D' etc.
| >>
| >> The Python interpreter tells me instead:
| >>
| >>
| > quit
| >>
| >>
| >> 'Use Ctrl-Z plus Return to exit.'
| >>
| >> Nah, 'Ctrl-Z' is now undo :-)
| >
| >
| > Are you really using the console, started with the "Command
| Prompt" icon
| > from the Start Menu (or some equivalent)?  And are you sure
| you haven't
| > installed something else that magically changed the
| behaviour of Ctrl-Z?
| >
| > (I get the documented behaviour with Python 2.4.1, under Win XP.)
| >
| > -Peter
|
| I'm getting the same behavior as Kay.

Usually means you have a readline package installed:

I know that this one gives the effect described:

http://sourceforge.net/projects/uncpythontools/

Don't know about this one:

http://newcenturycomputers.net/projects/readline.html

TJG


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Re: email format in python

[dimitri pater]

hello,
this one works quite well on validating email syntax:
http://www.secureprogramming.com/?action="">

regards,
DimitriOn 7/20/05, Dark Cowherd <[EMAIL PROTECTED]> wrote:
This seems to give reasonable results.import repattern = r'[EMAIL PROTECTED],4}\b'pattobj = re.compile(pattern)ps = pattobj.searchif ps(stringtocheck):But as lots of people have already told you on this list. This should
only be used to give a warning and not prevent the use of thatparticular address.DarkCowherd--http://mail.python.org/mailman/listinfo/python-list
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Re: dictionary as property

[Benjamin Niemann]

Thanos Tsouanas wrote:

> Hello.
> 
> (How) can I have a class property d, such that d['foo'] = 'bar' will run
> a certain function of the class with 'foo' and 'bar' as it's arguments?

I think you mean:

class A:
  def __init__(self):
self.d = {}

  def dict_change(self, key, value):
print key, value

a = A()
a.d['foo'] = 'bar'
--> foo bar

'a' only has a reference to 'd', it won't know, who has a copy of this
reference and what done to it.
What you could create, is a wrapper around 'd', that passes __getitem__,
__setitem__ and every other required method to the underlying dict and call
the appropriate hook method of A

class WrappedDict:
  def __init__(self, owner, d):
self.owner = owner
self.d = d

  def __setitem__(self, key, value):
self.owner.dict_changed(key, value)
self.d[key] = value

  def __getitem(self, key):
return self.d[key]

  

And in A.__init__
  self.d = WrappedDict(self, {})

You may also subclass WrappedDict from dict...

-- 
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://www.odahoda.de/
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Re: Opinions on KYLIX 3 (Delphi 4 Linux)

[David Trudgett]

"Thomas Bartkus" <[EMAIL PROTECTED]> writes:

>
> Good question!  Wither Borland?
>
> My impression (second hand - based on no direct experience with
> Kylix!) is that Borlands wonderful Delphi product ported to Linux
> has been a dissapointment.
>
>   * * * Someone with real experience on Kylix - please jump in here!

It has been two or three years since I gave Kylix a try, so my memory
is a bit vague on the specifics. I was working in a Delphi shop and
wanted to port (at least some of) our apps to Linux using Kylix (I
think it was version 3). I think I ported one and a half apps and more
or less gave up or put it on the back burner. My impression was that
Kylix still wasn't ready for serious development work.

The type of application I was working on (porting) involved
client/server database access, and TCP communications with other
applications. It never really worked correctly (I forget what the
problems were just now), but probably could have been made to work
correctly. The point was, however, that porting (a relatively simple)
Delphi app to Kylix shouldn't have been that hard.

>
> Calling Delphi "similar to Visual Basic" is hurtful because I
> believe that VB is the product of looting and pillaging the talent
> that came out of Borland.  I'm guessing that Microsoft has
> successfully targeted this perceived competitor with destruction.
>
> If Kylix were of the quality of Delphi, it would be a killer Linux app.

Possibly. Unfortunately, I don't believe that the whole GUI building
approach of Delphi/Kylix (or other similar tools) is much chop. It
encourages one, for instance, to just place elements on the screen in
fixed positions that make no allowance for differing fonts, screen
resolutions, etc. Java (my experience is with JBuilder) is much better
in this regard, although the different paradigm takes some getting
used to. However, all GUI builders with which I'm familiar (not many)
seem to have very real limitations when it comes to designing very
complex interfaces. Kenny Tilton's Cells project (ask on
comp.lang.lisp) has set me to thinking along these lines. In the past,
I never gave it much consideration.

Programmers who like Pascal should look at Ada as a better
alternative. If I wanted to program in a Pascal-like language on
Linux, Ada (the GNU Gnat compiler, integrated with GCC) is the one
that I would use. Ada, you could say, is like Pascal on
steroids. Caveat: I've read Ada books, but haven't programmed in it,
and my main concern is that its ultra strong typing might get in my
way -- or alternatively, force greater rigour, as the Ada folks might
say ;-).

These days, for hacking about, I prefer Common Lisp. It's faster
(sometimes approaching the speed of compiled C/Pascal) and much more
powerful than Python, but doesn't have the same library support
(smaller community), and application bundling and delivery *can* be a
potential problem, depending on various factors (such as whether you
want to license a commercial Common Lisp). Also, similar to Python,
there is no standard GUI framework defined for Common Lisp, so
choosing from the GUI frameworks available can be a challenge (I've
only programmed a simple GUI app using the great little Ltk library by
Peter Herth, which talks to Tk over a socket).

My advice would be to steer clear of Kylix and choose one of the other
environments suggested to you. If you really like Pascal, fpc may be a
possibility as someone mentioned. I haven't looked into it any time in
the last couple of years, though, so I don't know its status. I really
would suggest a serious look at Ada, though, if you want to develop
fast, industrial strength applications, or take advantage of built-in
concurrency support and lots of other goodies.

David



-- 

David Trudgett
http://www.zeta.org.au/~wpower/

I was in the pub last night, and a guy asked me for a light for his
cigarette. I suddenly realised that there was a demand here and money
to be made, and so I agreed to light his cigarette for 10 pence, but I
didn't actually give him a light, I sold him a licence to burn his
cigarette.  My fire-licence restricted him from giving the light to
anybody else, after all, that fire was my property. He was drunk, and
dismissed me as a loony, but accepted my fire (and by implication the
licence which governed its use) anyway. Of course in a matter of
minutes I noticed a friend of his asking him for a light and to my
outrage he gave his cigarette to his friend and pirated my fire! I was
furious, I started to make my way over to that side of the bar but to
my added horror his friend then started to light other people's
cigarettes left, right, and centre! Before long that whole side of the
bar was enjoying MY fire without paying me anything. Enraged I went
from person to person grabbing their cigarettes from their hands,
throwing them to the ground, and stamping on them.  

Strangely the door staff exhibited no respect for my property rights
as they threw me out the door.

-- Ian 

Re: Python IDE

[Fuzzyman]

Hmmm.. I've *never* hada problem with SPE crashing.. at least not under
Windoze...

Regards,

Fuzzy
http://www.voidspace.org.uk/python

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Re: Python Programming Contest

[Brian Quinlan]

Raymond Hettinger wrote:
> I'm curious about the stability of your timing setup.  If you run your
> own version of fly.py several times with the same starting seed, how
> much variation do you see between runs?

There is very little variation (about 0.1%) but my solution is over an 
order of magnitude slower than some of the submissions that I've gotten. 
It is likely that the overhead of my timing code is significant when 
running your solution.

I may have to *slightly* revise my test code to get better results. I 
think that I can do so without changing the distribution of the random 
schedule so as not to be biased against some solutions.

Cheers,
Brian
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Re: Reg file uploading

[Sybren Stuvel]

praba kar enlightened us with:
> When we upload a file to the remote server we can get file type
> through file extentions.

No you can't, you can only make a better guess. If I name my PNG file
somefile.jpg, you won't be able to get the file type through file
extentions.

> How we can find out file type  if a file doesn't have any
> extentions?

One method is to look at the Content-type header the client sent along
with the file. Another way is through the 'file' command.

Sybren
-- 
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself? 
 Frank Zappa
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Re: Ordering Products

[Ron Adam]

Kay Schluehr wrote:
> Ron Adam wrote:
> 
>> Kay Schluehr wrote:

>> BTW.. Usually when people say "I don't want to discourage...", They
>>  really want or mean the exact oppisite.
> 
> Yes, but taken some renitence into account they will provoke the 
> opposite. Old game theoretic wisdoms ;)

True..  but I think it's not predictable which response you will get
from an individual you aren't familiar with.  I prefer positive
reinforcement over negative provocation myself. :-)


> But you seem to fix behaviour together with an operation i.e.
> declaring that __mul__ is commutative. But in a general case you
> might have elements that commute, others that anti-commute ( i.e. a*b
> = -b*a ) and again others where no special rule is provided i.e. they
> simply don't commute.
> 
> But much worse than this the definition of the operations __add__, 
> __mul__ etc. use names of subclasses A,D explicitely(!) what means
> that the framework can't be extended by inheritance of A,D,M etc.
> This is not only bad OO style but customizing operations ( i.e.
> making __mul__ right associative ) for certain classes is prevented
> this way. One really has to assume a global behaviour fixed once as a
> class attribute.

I don't know if it's bad OO style because I chose a flatter model.
Your original question wasn't "what would be the best class structure to
use where different algebra's may be used".  It was how can sorting be
done to an expression with constraints. And you gave an example which 
set __mul__ as associative as well.

So this is a different problem.  No use trying to point that what I did
doesn't fit this new problem, it wasn't suppose to.  ;-)

I'm not sure what the best class structure would be.  With the current
example,  I would need to copy and edit F and it's associated sub
class's to create a second algebra type, F2, A2, M2.. etc.  Not the best
solution to this additional problem which is what you are pointing out I
believe.

So...  We have factors (objects), groups (expressions), and algebras
(rules), that need to be organized into a class structure that can
be extended easily.

Does that describe this new problem adequately?  I'm not sure what the
best, or possible good solutions would be at the moment.  I'll have to 
think about it a bit.


>> c*3*a*d*c*b*7*c*d*a = (21*a*a*b*c*c*c*d*d)
> 
> 
> I still don't see how you distinguish between factors that might 
> commute and others that don't. I don't want a and b commute but c and
> d with all other elements.

In my example factors don't commute.  They are just units, however
factors within a group unit may commute because a group is allowed to 
commute factors if the operation the group is associated to is commutable.


> If you have fun with those identities you might like to find 
> simplifications for those expressions too:
> 
> a*0   -> 0 a*1   -> a 1/a/b -> b/a a+b+a -> 2*a+b a/a   -> 1 a**1  ->
> a
> 
> etc.

Already did a few of those.  Some of these involve changing a group into 
a different group which was a bit of a challenge since an instance can't 
magically change itself into another type of instance, so the parent 
group has to request the sub-group to return a simplified or expanded 
instance, then the parent can replace the group with the new returned 
instance.

a*a*a -> a**3 change from a M group to a P group.
a*0   -> 0change from a M group to an integer.
a*1   -> achange from a M group to a F unit.
a+b+a -> 2*a+bchange a A subgroup to a M group.
a/a   ->  change a D group to an integer.
a**1  ->  change a P group to a M group to a F unit.

Some of those would be done in the simplify method of the group.  I've 
added an expand method and gotten it to work on some things also.

   a*b**3  ->  a*b*b*b
   c*4 ->  c+c+c+c


>> What do you mean by 'sub-algebra generation'?
>  
> Partially what I described in the subsequent example: the target of
> the addition of two elements x,y of X is again in X. This is not
> obvious if one takes an arbitrary nonempty subset X of Expr.

Would that be similar to the simultaneous equation below?

z = x+y<-  term x+y is z
x = a*z+b  <-  z is in term x
x = a(x+y)+b   <-  x is again in x  (?)

I think this would be...

 >>> x, y = F('x'), F('y')
 >>> z = x+y
 >>> x = a*z+b
 >>> x
(((x+y)*a)+b)

This wouldn't actually solve for x since it doesn't take into account 
the left side of the = in the equation.  And it would need an eval 
method to actually evaluated it.  eval(str(expr)) does work if all the 
factors are given values first.


Cheers,
Ron

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Re: is a file open ?

[John Machin]

luis wrote:
> for root, dirs, files in os.walk(path):
>for file in files:
>   # ¿ is opened ?
> 

¡ rtfm ! "files" is a list of fileNAMEs -- i.e. strings.
¿ How could you possibly imagine that your sample code would open a 
file? What a design-nonsense that would be: instant complaints from folk 
who wanted to do some further selection before opening (if they ever 
wanted to open the files at all).
¿ Did you contemplate *trying* this code to see what happened ?
¡ Don't use "file" as a name; it shadows the built-in file function !
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Re: is a file open ?

[Daniel Dittmar]

luis wrote:
> for root, dirs, files in os.walk(path):
>for file in files:
>   # ¿ is opened ?

On Linux and some other Unixes, you can probably read the /proc filesystem.

On Windows, you'll probably get the quickest result by running 
handle.exe (http://www.sysinternals.com/Utilities/Handle.html).

Either way, the information you'll get is restricted by your permissions.

Either information will get stale really fast, so it's not suitable if 
your task is something like 'can I backup this directory or is someone 
writing to a file?'

Daniel
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Re: Python IDE

[Franz Steinhaeusler]

On 18 Jul 2005 22:32:43 -0700, "linuxfreak" <[EMAIL PROTECTED]> wrote:

>Tried SPE and
>Dr.Pyhton but the former crashes regulary and the latter is quite
>unweildy and does not have a great many features


Hello,

what are you missing in DrPython?
Did you took a look at the plugins?
What do you mean by "unweildly"?

-- 
Franz Steinhaeusler
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Re: is a file open ?

[John Machin]

Daniel Dittmar wrote:
> luis wrote:
> 
>> for root, dirs, files in os.walk(path):
>>for file in files:
>>   # ¿ is opened ?
> 
> 
> On Linux and some other Unixes, you can probably read the /proc filesystem.
> 
> On Windows, you'll probably get the quickest result by running 
> handle.exe (http://www.sysinternals.com/Utilities/Handle.html).
> 
> Either way, the information you'll get is restricted by your permissions.
> 
> Either information will get stale really fast, so it's not suitable if 
> your task is something like 'can I backup this directory or is someone 
> writing to a file?'

If that's what the OP had in mind, the question might have been better 
phrased as "given the path to a file, how can I tell if it is currently 
opened by another process/thread", and better directed to OS-specifc 
newsgroup(s).

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Re: Python IDE

[Franz Steinhaeusler]

On 19 Jul 2005 19:56:49 -0700, "Luis M. Gonzalez" <[EMAIL PROTECTED]>
wrote:

>Have you tried PyCrust?
>http://sourceforge.net/projects/pycrust/

It is long time ago, that pycrust was delevoped 
as sourceforge project.

It is part of the wxPython distribution and 
I have recently added some features.

You could take a look at wxPython-user mailing list.

Pycrust is great to try/play with Python and wxPython.

But also DrPython has a powerful shell prompt.
-- 
Franz Steinhaeusler
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Re: list implementation

[Heikki Orsila]

Raymond Hettinger <[EMAIL PROTECTED]> wrote:
> [sj]
>> Thus, random access is an O(1) operation while insertion/deletion is an
>> O(n) operation.

> Yes.

Unfortunately no. Check Terry Reeds answer. Random access is O(1),
insertion/deletion to front is O(n), and i/d to back is O(1). The back
i/d operation has amortized O(1) cost.

-- 
Heikki Orsila   Barbie's law:
[EMAIL PROTECTED]   "Math is hard, let's go shopping!"
http://www.iki.fi/shd
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Re: How to send a query to the browser from time to time?

[Admin]

On Wed, 20 Jul 2005 00:26:13 -0300, Mike Meyer <[EMAIL PROTECTED]> wrote:

> AJAX is overkill for this. If you just want to automatically refresh
> the page automatically, you can use a meta refresh tag.

Reloading the page automatically would be even worse because it would  
spend a lot of bandwidth, it would reload all the page and graphics all  
the time.

-- 
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Admin.
Want to buy me a book? http://tinyurl.com/78xzb :)
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Re: OO design

[chris]

Extremely grateful for all the responses. I've pasted them all into a
document and can now read all your valuable ideas together. Even at a first
reading they have already helped clarify my thinking.

Also minor clarifications::

> I'm hoping some of you python
> lamas out there might be able to share some of your wisdom on the subject.

lama = guru = teacher(not a furry animal, although my dog has certainly
taught me a few tricks ... like when to take her for a walk, when to play
ball, and when its time for a tummy rub.)

> bwaha

be well and happy always






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Re: How to send a query to the browser from time to time?

[Admin]

On Tue, 19 Jul 2005 19:43:25 -0300, [EMAIL PROTECTED] <[EMAIL PROTECTED]>  
wrote:

> otherwise, my only suggestion is to use another protocol instead of
> http.

What do you suggest?


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Admin.
Want to buy me a book? http://tinyurl.com/78xzb :)
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Re: access the text being generated in other windows

[bmgz]

algebraist wrote:
> is there a way python can access the text being generated in other
> windows, by other programs/processes?

my guess- you will probably have to resort to some rather downright 
dirty screen scraping.
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Re: goto

[Peter Hansen]

Sybren Stuvel wrote:
> Mike Meyer enlightened us with:
> 
>>>I dislike gotos because it is too easy to inadvertently create
>>>infinite loops. <10 WINK; 20 GOTO 10>
>>
>>And it's impossible without them? 
> 
> 
> I thought the same thing, but then I read it again and thought about
> the "inadvertently". As soon as you see a "while True", you _know_
> it's going to loop forever. 

Unless it doesn't, of course:

while True:
 break
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Re: Strange os.path.exists() behaviour

[Casey Hawthorne]

Does this work differently under other platforms?

Pierre Quentel <[EMAIL PROTECTED]> wrote:

>os.path.exists(path) returns True if "path" exists
>
>But on Windows it also returns True for "path" followed by any number of 
>dots :
>
>Python 2.4 (#60, Nov 30 2004, 11:49:19) [MSC v.1310 32 bit (Intel)] on win32
>Type "help", "copyright", "credits" or "license" for more information.
> >>> import os
> >>> os.path.exists('Lib/os.py')
>True# expected
> >>> os.path.exists('Lib/os.py.')
>True# unexpected
> >>> os.path.exists('Lib/os.py.')
>True# unexpected
> >>>
>
>Is there a reason for this ? Is there a test that returns True only for 
>the really existing path ?
>
>Pierre

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Casey
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Re: python certification

[[EMAIL PROTECTED]]

hi
i bassically need it cuz i am appyling to colleges this year and
i know this kind of stuff really helps.
besides since i am learning python i thought i might get some credit
for it as well.
its bassically for a mention in my resume/bio-data/appliccation
i am willing to spend about $50-100 but any more is out of my bugdet.
even $50 is hard on me.
i did find this great site that would  let me give a perl exam in $9.99
but they don't have python.

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Re: python certification

[dimitri pater]

Hello,
Python is not about certificates or diplomas, so do not spend any money
on it (the other guy was only joking). If you want to show your python
skills to others (like the teachers from the college you want to go
to), use this list. Participate in discusions, ask quesions, maybe even
write a tutorial. Maybe then they will think: "hey, this guy (or girl)
is really doing something with his skills".

Just an idea,
DimitriOn 20 Jul 2005 05:41:39 -0700, [EMAIL PROTECTED] <
[EMAIL PROTECTED]> wrote:hii bassically need it cuz i am appyling to colleges this year and
i know this kind of stuff really helps.besides since i am learning python i thought i might get some creditfor it as well.its bassically for a mention in my resume/bio-data/appliccationi am willing to spend about $50-100 but any more is out of my bugdet.
even $50 is hard on me.i did find this great site that would  let me give a perl exam in $9.99but they don't have python.--http://mail.python.org/mailman/listinfo/python-list
-- All
truth passes through three stages. First, it is ridiculed. Second, it
is violently opposed. Third, it is accepted as being self-evident.Arthur Schopenhauer -Please visit dimitri's website: www.serpia.com
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Re: Python s60 Contact DB

[xen0n]

I have already posted the question to the Nokia forum, but, for now,
noone seems to have an answer... Hope this is a bug of py2sis... I dont
want to rewrite my entire application for a stupid bug!

could ildg ha scritto:
> You should raise this question at Nokia python for series60 forum,
> I'm sure you can the answer there.
> http://discussion.forum.nokia.com/forum/forumdisplay.php?s=85e4c1acee330fddde6b47a7b2feae73&forumid=102
>
>
> On 19 Jul 2005 06:47:10 -0700, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> > Hi, i hope the expert can help me!
> > I have a little problem:
> >
> > This piece of code, in python console s60, before compiling will work
> > great:
> >
> > try:
> > ..db = contacts.open()
> > ..names = []
> > ..numbers = []
> >
> > The problem is that, if i compile it with py2sis (pyrsc_template.tmp
> > replaced with the original to solve the submenus bug) it doesnt work,
> > when that piece of code is executed, i receive error -50 and nothing
> > happen! hope u can help me! 10ks a lot in advance
> >
> > Regards.
> > 
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >

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is this pythonic?

[Mage]

Or is there better way?

for (i, url) in [(i,links[i]) for i in range(len(links))]:
  ...

"links" is a list.

   Mage


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Re: is this pythonic?

[Simon Brunning]

On 7/20/05, Mage <[EMAIL PROTECTED]> wrote:
> Or is there better way?
> 
> for (i, url) in [(i,links[i]) for i in range(len(links))]:

for i, url in enumerate(links):

-- 
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Simon B,
[EMAIL PROTECTED],
http://www.brunningonline.net/simon/blog/
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Re: main window in tkinter app

[William Gill]

That does it!, thanks.

Thinking about it, when I created a derived class with an  __init__ 
method, I  overrode the base class's init.  It should have been 
intuitive that I needed to explicitly call baseclass.__init(self), it 
wasn't.  It might have hit me if the fault was related to someting in 
baseclass.__init() not taking place, but the recursion loop didn't give 
me a clue.  Any idea why failing to init the base class caused the loop?


Bill


Christopher Subich wrote:
> William Gill wrote:
> 
>> O.K. I tried from scratch, and the following snippet produces an 
>> infinite loop saying:
>>
>>   File "C:\Python24\lib\lib-tk\Tkinter.py", line 1647, in __getattr__
>>   return getattr(self.tk, attr)
>>
>> If I comment out the __init__ method, I get the titled window, and 
>> print out self.var ('1')
>>
>>
>> import  os
>> from Tkinter import *
>>
>> class MyApp(Tk):
>> var=1
>> def __init__(self):
>>   pass
>> def getval(self):
>>   return self.var
>>
>>
>> app = MyApp()
>>
>> app.title("An App")
>> print app.getval()
>> app.mainloop()
> 
> 
> You're not calling the parent's __init__ inside your derived class.  I 
> would point out where the Python Tutorial points out that you should do 
> this, but it's not in the obvious place (Classes: Inheritance).
> 
> Python does -not- automagically call parent-class __init__s for derived 
> classes, you must do that explicitly.  Changing the definition of your 
> class to the following works:
>  >>> class MyApp(Tk):
> var=1
> def __init__(self):
>   Tk.__init__(self)
>   pass
> def getval(self):
>   return self.var
> 
> It works when you comment out __init__ because of a quirk in Python's 
> name resolution.  As you'd logically expect, if you don't define a 
> function in a derived class but call it (such as instance.method()), it 
> will call the method from the base class.
> 
> You just proved that this works for __init__ methods also.  When you 
> didn't define __init__ for your derived class, MyApp() called 
> Tk.__init__(), which Does the Right Thing in terms of setting up all the 
> specific Tkinter-specific members.
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Re: socket programming

[gry]

What I have done in similar circumstances is put in a random sleep
between connections to fool the server's load manager.  Something like:

.import time
.min_pause,max_pause = (5.0, 10.0) #seconds
.while True:
.   time.sleep(random.uniform(min_pause, max_pause))
.   do_connection_and_query_stuff()

It works for me.  Just play with the pause parameters until it fails
and add a little.

-- George

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Re: Python IDE

[projecktzero]

You should probably stick with Xemacs. I use VIM, but I would be
surprised if Xemacs doesn't have those features you want. Also, it's
probably better to learn one editor well than a little bit of a bunch
of different editors.

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Re: How do I send keystrokes to a console window in Windows XP?

[RTG]

Thank you, Peter.

The application is a <<>> and
we want to automatically interact with it (e.g. sendkeys and capture
certain text responses).

I will look for the thread you mentioned.

- Roy

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Re: How to kill easygui dialog?

[utabintarbo]

William,

Thanks for the reply. No flames, but I am running on both Linux and
Windows, so I need a x-platform  solution. I thought I had it with
easygui...

Must try some other ideas

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Re: socket programming

[Helge Aksdal]

* gry@ll.mit.edu  [2005/07/20 15:26]:

> What I have done in similar circumstances is put in a random sleep
> between connections to fool the server's load manager.  Something like:
> 
> .import time
> .min_pause,max_pause = (5.0, 10.0) #seconds
> .while True:
> .   time.sleep(random.uniform(min_pause, max_pause))
> .   do_connection_and_query_stuff()
> 
> It works for me.  Just play with the pause parameters until it fails
> and add a little.

thanks for the tip. i'll give that a shot.

-- 
Helge Aksdal
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getting the class name of a subclass

[flupke]

I have the following test code setup, trying to get the class name of a 
subclass in the super class. (Reason why i want this is described below)

file class_name_start.py

import class_name as cn

obj = cn.B()
obj.printclass()



file class_name.py

class A(object):
 def __init__(self):
 print "I'm A"

 def printclass(self):
 print "Name ",__name__
 print "Class ",A.__name__

class B(A):
 def __init__(self):
 super(B,self).__init__()
 print "I'm B"


Output:
I'm A
I'm B
Name  class_name
Class A

I would want the last line to be Class B
The reason i want this is since i have a number of dialogs all deriving 
from the same super class. In the superclass i have a save function and 
i thought it would be easy to get the classname and write the properties 
in a filename with the classes name as the filename.
However it turns out i get the class name of the superclass for all.
All the different dialogs are in seperate files.

Is there a way to get the name of the subclass. If not i could always 
pass a param to the init function but in my real life code i already 
have several params shipped to the init so i wanted to solve it slightly 
more elegant.

Regards,
Benedict
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Re: python certification

[Fabien]

> Python is not about certificates or diplomas, so do not spend any
> money on it (the other guy was only joking).

Even if Python is not about certificates, I think it's not the case for
some company. And when you say to a company that you know how to dev. in
Python, they don't know anything about your level.

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Re: How to kill easygui dialog?

[Martin Franklin]

[EMAIL PROTECTED] wrote:
> William,
> 
> Thanks for the reply. No flames, but I am running on both Linux and
> Windows, so I need a x-platform  solution. I thought I had it with
> easygui...
> 
> Must try some other ideas
> 


Can you post an example... the following works for me...


 >>> import easygui
 >>> while 1:
... rv = easygui.enterbox()
... if rv:
... print "Done"
... break
...
...
Done

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Re: python certification

[Cyril Bazin]

Fine, 

Go to "http://www.pythonchallenge.com" and try the challenge, if you
are able to get to the level 17-18, you can say you start to have good
skills in Python. You will  prove:
you are not stupid, 
you know regex, basic sound/image treatment, the basics of zip/bz2, you
understood how to use urllib/urllib2 and xmlrpc and many other things.

When you get to the level 17-18, go to the IRC and ask to "theSamet" a
certification. If he is in a good mood, maybe he will give you an
ascii-art diplom like Rocco! ;-)

Cyril
On 20 Jul 2005 05:41:39 -0700, [EMAIL PROTECTED] <[EMAIL PROTECTED]
> wrote:hii bassically need it cuz i am appyling to colleges this year and
i know this kind of stuff really helps.besides since i am learning python i thought i might get some creditfor it as well.its bassically for a mention in my resume/bio-data/appliccationi am willing to spend about $50-100 but any more is out of my bugdet.
even $50 is hard on me.i did find this great site that would  let me give a perl exam in $9.99but they don't have python.--http://mail.python.org/mailman/listinfo/python-list

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Crafting IP packets with DNS queries .........newbie

[laksh]

hi all

im looking for some code that can capture the IP packets from my system
and craft them so that im able to put lots of DNS requests in them and
send them to the server.

is it possible and will the DNS server takes it for legal DNS request
packets?? and should i need to incorporate some code at the server end
to decode the packets from my machine and encode the results from the
DNS??

is all this possible ?

first of all i want to know to craft some IP packets in python with
loads of DNS queries in them..

regards
laksh

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wxPython field validation

[lux]

Hi all,
I'm using wxPython and I need to block
the cursor (focus) in a TextCtrl until the field
value is valid.

I've look EVT_KILL_FOCUS but I can't stop the
focus beavoir (no focus to next field)

Any ideas?

Tanks a lot and sorry for my english.

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Re: python certification

[Andreas Kostyrka]

On Wed, Jul 20, 2005 at 04:22:10PM +0200, Fabien wrote:
> > Python is not about certificates or diplomas, so do not spend any
> > money on it (the other guy was only joking).
> 
> Even if Python is not about certificates, I think it's not the case for
> some company. And when you say to a company that you know how to dev. in
> Python, they don't know anything about your level.

Well, that's what CVs, project histories and interviews are about.

Asking for certification in Python (and propably for any other programming
language) usually only shows that the person who asks doesn't have a clue
what they are asking about ;)

(These are the people look for Pearl and Pyhton programmers ;) )

Andreas
> 
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> http://mail.python.org/mailman/listinfo/python-list
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Re: Windows command line problem

[Benji York]

[EMAIL PROTECTED] wrote:
> I think the lesson there is 'dont depend on getopt, write your own
> command line parser'. I always write my own, as it's so easy to do.

While I'll agree that getopt isn't ideal, I find optparse to be much better.
--
Benji York

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Re: python certification

[Kay Schluehr]

[EMAIL PROTECTED] schrieb:
> hi
> i bassically need it cuz i am appyling to colleges this year and
> i know this kind of stuff really helps.
> besides since i am learning python i thought i might get some credit
> for it as well.
> its bassically for a mention in my resume/bio-data/appliccation
> i am willing to spend about $50-100 but any more is out of my bugdet.
> even $50 is hard on me.
> i did find this great site that would  let me give a perl exam in $9.99
> but they don't have python.

Before you spend some of your few money for an obscure certification
without any authority you should feel certain that you need Python at
your college. Better you participate in an open source project for fun
and gathering some experience if it's not too hard for you to access a
computer. Of course I don't know your supervisors and I'm not sure
whether they are more impressed about people learning the Python
tutorial, than about people using it to write real world applications.

Kay

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Re: python certification

[Kay Schluehr]

Andreas Kostyrka schrieb:

> (These are the people look for Pearl and Pyhton programmers ;) )

Or Phyton :)

Kay

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Re: getting the class name of a subclass

[George Sakkis]

"flupke" <[EMAIL PROTECTED]> wrote:

> I have the following test code setup, trying to get the class name of a
> subclass in the super class. (Reason why i want this is described below)
>
> file class_name_start.py
> 
> import class_name as cn
>
> obj = cn.B()
> obj.printclass()
> 
>
>
> file class_name.py
> 
> class A(object):
>  def __init__(self):
>  print "I'm A"
>
>  def printclass(self):
>  print "Name ",__name__
>  print "Class ",A.__name__
>
> class B(A):
>  def __init__(self):
>  super(B,self).__init__()
>  print "I'm B"
> 
>
> Output:
> I'm A
> I'm B
> Name  class_name
> Class A
>
> I would want the last line to be Class B
> The reason i want this is since i have a number of dialogs all deriving
> from the same super class. In the superclass i have a save function and
> i thought it would be easy to get the classname and write the properties
> in a filename with the classes name as the filename.
> However it turns out i get the class name of the superclass for all.
> All the different dialogs are in seperate files.
>
> Is there a way to get the name of the subclass. If not i could always
> pass a param to the init function but in my real life code i already
> have several params shipped to the init so i wanted to solve it slightly
> more elegant.
>
> Regards,
> Benedict


Make printclass a class method:

class A(object):
def __init__(self):
print "I'm A"

# for python 2.4
@classmethod
def printclass(cls):
print "Module", cls.__module__
print "Class", cls.__name__
# for 2.3 or older
printclass = classmethod(printclass)


Regards,
George


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Re: getting the class name of a subclass

[flupke]

George Sakkis wrote:


> Make printclass a class method:
> 
> class A(object):
> def __init__(self):
> print "I'm A"
> 
> # for python 2.4
> @classmethod
> def printclass(cls):
> print "Module", cls.__module__
> print "Class", cls.__name__
> # for 2.3 or older
> printclass = classmethod(printclass)
> 
> 
> Regards,
> George

George,

it works like a charm.

Thanks!
Benedict
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Re: wxPython field validation

[fred.dixon]

why not validate then put cursor back into that field until satisfied.
might use the lost focus (cant remember exact name right now)

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Re: getting the class name of a subclass

[Dan Sommers]

On Wed, 20 Jul 2005 14:06:57 GMT,
flupke <[EMAIL PROTECTED]> wrote:

> file class_name.py
> 
> class A(object):
>  def __init__(self):
>  print "I'm A"

>  def printclass(self):
>  print "Name ",__name__
>  print "Class ",A.__name__

Why "A.__name__" and not "self.__class__.__name__"?

Regards,
Dan

-- 
Dan Sommers

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Re: What does "::" mean?

[qwweeeit]

Hi Robert,
I didn't succeed in reversing a string with the "full form" you
proposed:
live[len(live)-1:-1:-1] # where live="live"
The result is an empty string.
To  reverse "live" (in a "full form"), I have to put a char in front of
the string and...:
('x'+live)[len(live)+1:0:-1]   # --> "evil"
Is it due to the Python's version (I still have 2.3.4)?
Bye.

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Need to interrupt to check for mouse movement

[stringy]

I have a program that shows a 3d representation of a cell, depending on
some data that it receives from some C++. It runs with wx.timer(500),
and on wx.EVT_TIMER, it updates the the data, and receives it over the
socket.
In my program I also want to be able to rotate the 3d representation,
and can do so, and all the code works. However, I have a problem in
that while the program is updating itself (pretty much all the time
unless I tell it not to), it won't detect mouse motion, I'm guessing
because it doesn't have time to.

Is there any manual way to get a program to check for mouse movement,
that way I'd be able to check for mouse movement half way through my
updating the data over the socket, and then do the necessary rotations
before it finishes updating the data.

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Re: What does "::" mean?

[Robert Kern]

[EMAIL PROTECTED] wrote:
> Hi Robert,
> I didn't succeed in reversing a string with the "full form" you
> proposed:
> live[len(live)-1:-1:-1] # where live="live"
> The result is an empty string.
> To  reverse "live" (in a "full form"), I have to put a char in front of
> the string and...:
> ('x'+live)[len(live)+1:0:-1]   # --> "evil"
> Is it due to the Python's version (I still have 2.3.4)?

No, it's because I am stupid. There isn't a full form. 
live[len(live)::-1] is the closest expansion.

-- 
Robert Kern
[EMAIL PROTECTED]

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter

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Re: Image orientation and color information with PIL?

[tvmaly]

Jeff, this was exactly what I was looking for.  I wrote a script with
this code and it worked perfectly.

  Thanks 

 Ty

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ANN: PyDev 0.9.6 released

[Fabio Zadrozny]

Hi All,

PyDev - Python IDE (Python Development Enviroment for Eclipse) version 
0.9.6 has just been released.

This is to be considered a stable release for all features but the 
debugger, as there are still some integration issues for it to work with 
Eclipse 3.1, so, if you are using PyDev because of its debugger support, 
you should stick to version 3.0.x until those issues are fixed.

Check the homepage (http://pydev.sourceforge.net/) for more details.

The major release highlights is that it Eclipse 3.1 is now supported. 
Older versions of Eclipse are no longer supported.

Regards,

-- 
Fabio Zadrozny
--
Software Developer

ESSS - Engineering Simulation and Scientific Software
www.esss.com.br

PyDev - Python Development Enviroment for Eclipse
pydev.sf.net
pydev.blogspot.com


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convert ascii escapes into binary form

[Hans-Peter Jansen]

Hi Pythonistas,

I need to convert ascii escapes into binary form, e.g.:
\f -> ^L
[EMAIL PROTECTED] -> [EMAIL PROTECTED]@

(rvalues in terminal representation)

Any idea, how to do this most elegantly in python?
Do I really need to do a search n'replace orgy, combined with 
regex for this task?

TIA,
Pete


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Re: python certification

[Sebastian Bassi]

On 16 Jul 2005 09:51:55 -0700, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
> i want to get a small certificate or diploma in python.
> it should be online cuz i live in pakistan and wont have teast centers
> near me.
> it should be low cost as i am not rich.
> and hopefully it would be something like a a begginer certification cuz
> i am new to python.

I could make a program, upload it to sourceforge (or similar OSS
repository) and add that to your resume. Another opcion is to help in
the development of any python-based program and work enought to be
included in the authors list. That could be useful too (because you
learn and do some good for more people). I believe more in a working
program than a paper based certificate.


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Re: Newbie question: Explain this behavior - a followup

[David Smith]

max wrote:
> David Smith <[EMAIL PROTECTED]> wrote in
> news:[EMAIL PROTECTED]: 
> 
> 
>>range statements, the example doesn't work.
>>
>>Given that the beginning and ending values for the inner range
>>statement are the same, the inner range statement will never be
> 
> 
> Is your question about the semantics of for else blocks or about the 
> suitability of the algorithm given in the example? The for else block 
> is behaving exactly as expected...
> 
> 

Good question.  The question was directed at the latter, the suitability 
of algorithm for determining prime numbers.

range(1,1)
> 
> []
> 
range(500,500)
> 
> []
> 
> 
> see 
> http://groups-
> beta.google.com/group/comp.lang.python/browse_frm/thread/d6c084e791a00
> 2f4?q=for+else&hl=en&
> 
> for a good explanation of when the else part of the loop is executed. 
> Basically, whenever the loop is exited normally, which is what happens 
> when you iterate over an empty list like the one returned by 
> range(1,1)
> 
> 
> max
> 
> 
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How to store "3D" data? (data structure question)

[Sebastian Bassi]

Hello,

I have to parse a text file (was excel, but I translated to CSV) like
the one below, and I am not sure how to store it (to manipulate it
later).

Here is an extract of the data:

Name,Allele,RHA280,RHA801,RHA373,RHA377,HA383
TDF1,181,
,188,
,190,
,193,*,*,,,
,None,,,*,*,*
,,
TDF2,1200,*,*,,,*
,None,,,*,*,
,,
TDF3,236,
,240,
,244,*,,*,,*
,252,*,*,,,
,None*,
,,

Should I use lists? Dictionary? Or a combination?
The final goal is to "count" how many stars (*) has any "LINE" (a line
is RHA280 for instance).
RHA280 has 1 star in TDF1 and 1 star in TDF2 and 2 stars in TDF3.

I am lost because I do analize the data "line by line" (for Line in
FILE) so it is hard to count by column.



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Re: convert ascii escapes into binary form

[Robert Kern]

Hans-Peter Jansen wrote:
> Hi Pythonistas,
> 
> I need to convert ascii escapes into binary form, e.g.:
> \f -> ^L
> [EMAIL PROTECTED] -> [EMAIL PROTECTED]@
> 
> (rvalues in terminal representation)
> 
> Any idea, how to do this most elegantly in python?
> Do I really need to do a search n'replace orgy, combined with 
> regex for this task?

In [11]: s = '\\f'

In [12]: s.decode('string_escape')
Out[12]: '\x0c'

-- 
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"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter

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Re: main window in tkinter app

[Christopher Subich]

William Gill wrote:
> That does it!, thanks.
> 
> Thinking about it, when I created a derived class with an  __init__ 
> method, I  overrode the base class's init.  It should have been 
> intuitive that I needed to explicitly call baseclass.__init(self), it 
> wasn't.  It might have hit me if the fault was related to someting in 
> baseclass.__init() not taking place, but the recursion loop didn't give 
> me a clue.  Any idea why failing to init the base class caused the loop?

You never pasted the first part of the traceback:

   File "", line 1, in -toplevel-
 app.title('frob')
   File "C:\Python24\Lib\lib-tk\Tkinter.py", line 1531, in wm_title
 return self.tk.call('wm', 'title', self._w, string)
   File "C:\Python24\Lib\lib-tk\Tkinter.py", line 1654, in __getattr__
 return getattr(self.tk, attr)
   File "C:\Python24\Lib\lib-tk\Tkinter.py", line 1654, in __getattr__
 return getattr(self.tk, attr)

When you didn't call Tk.__init__(self), self.tk was never initialized. 
Further, it's obvious from the traceback that Tk implements a 
__getattr__ method; from the python docs:

__getattr__(self,name): Called when an attribute lookup has not found 
the attribute in the usual places

Since self.tk doesn't exist, __getattr__(self,tk) was called.  Without 
looking at the TKinter source code, we can surmise that there's a 
default behavior of "if self doesn't have it, return the relevant 
attribute from within self.tk."  The problem, of course, arises when 
self.tk doesn't exist -- this causes the self.tk reference to call 
self.__getattr__('tk'), which is recursive.

The infinite recursion, then, is a mild bug in TKinter that doesn't show 
itself during normal use.  The proper solution should be to replace the 
self.tk call with either self.__dict__['tk'], or to make Tk a new-style 
class and use object.__getattribute__(self,'tk'). (Note: there are 
probably some fine details that I'm missing in this 'solution', so take 
it with a potato-sized grain of salt.  The general principle still 
applies though.)
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Re: Newbie - chapter 19 in "How to think like a CS in python"

[MooMaster]

Well, being a lowly CS student myself this sounded like fun, so I went
ahead and took the challenge. The first thing you have to consider is
how to add the new element to the list. Obviously you have to iterate
through the list, find the first element that the new one is greater
than, and insert this one before it while keeping the list structure
intact. You must also remember to update the head if necessary, and add
at the end if the element to be added is less than what is already in
the list...So this is what I came up with:

First of all, however, add this to your Improved Queue Class-
 def printQueue(self):
if(self.isEmpty()):
print "Empty"
else:
pointer = self.head
while(pointer != None):
print str(pointer.cargo)
pointer = pointer.next

Then--
class PriorityQueueList(ImprovedQueue):
def __init__(self):
ImprovedQueue.__init__(self)

def insert(self, cargo):
newNode = Node(cargo)
if self.length == 0:
self.head = self.last = newNode
else:
#iterate through the list, keeping a reference to a
node and the node before it
tracker = self.head
while(tracker !=None):
copy2 = tracker.prev
if(newNode.cargo > tracker.cargo):
#add the new node by updating links, then update
head while keeping list intact
tracker.prev = newNode
newNode.next = tracker
self.head = newNode
newNode.prev = copy2
if(copy2 !=None):
copy2.next = newNode
break
else:
tracker = tracker.next
#if a repeat element is added
#we want to add to end to preserve the queue structure,
thus if the element hasn't
#been added at this point it should be added at the end

if(newNode.prev ==None and newNode.next ==None):
last = self.last
last.next = newNode
self.last = newNode
self.length = self.length + 1

This produces the following output-
>>> l = PriorityQueueList()
>>> l.insert(1)
>>> l.insert(2)
>>> l.insert(1)
>>> l.printQueue()
2
1
1
>>> l.insert(10)
>>> l.printQueue()
10
2
1
1

Hope this helps!

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Re: Need to interrupt to check for mouse movement

[MooMaster]

Have you tried binding EVT_MOTION(func) to your window?

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Re: How to store "3D" data? (data structure question)

[Graham Fawcett]

Sebastian Bassi wrote:
> Hello,
>
> I have to parse a text file (was excel, but I translated to CSV) like
> the one below, and I am not sure how to store it (to manipulate it
> later).
>
> Here is an extract of the data:
>
[snip]

This looks a lot like 2D data (row/column), not 3D. What's the third
axis? It looks, too, that you're not really interested in storage, but
in analysis...

Since your "line" columns all have names, why not use them as keys in a
dictionary? The associated values would be lists, in which you could
keep references to matching rows, or parts of those rows (e.g. name and
allele). Count up the length of the row, and you have your "number of
matches".



import csv  # let Python do the grunt work

f = file('name-of-file.csv')
reader = csv.reader(f)

headers = reader.next() # read the first row
line_names = headers[2:]

results = {}# set up the dict
for lname in line_names:# each key is a line-name
results[lname] = []

for row in reader:  # iterate the data rows
row_name, allele = row[:2]
line_values = row[2:]   # get the line values.
# zip is your friend here. It lets you iterate
# across your line names and corresponding values
# in parallel.
for lname, value in zip(line_names, line_values):
if value == '*':
results[lname].append((row_name, allele))

# a quick look at the results.
for lname, matches in results.items():
print '%s %d' % (lname, len(matches))


Graham

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Re: Using SHFileOperation

[Roger Upole]

SHFILEOPSTRUCT is just a tuple, with the elements
listed in docs.

from win32com.shell import shell, shellcon
shell.SHFileOperation((0, shellcon.FO_DELETE, 'somefilename', None, 
shellcon.FOF_ALLOWUNDO|shellcon.FOF_NOCONFIRMATION))

   hth
   Roger

"avishay" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]
> Hi All,
> I want to use SHFileOperation using Python and Win32 extentions, in
> order to move a file to the trash can. The function itself can be
> accessed by importing win32com.shell.shell. However, I cannot find
> anywhere the SHFILEOPSTRUCT. This structure is mentioned in the
> documentation of the Win32 extentions, but I can't find a way to access
> it.
> I would appreciate your help. If there's an alternative way to send a
> file to the trash can, that can also help.
>
> Best Regards
> Avishay
> 



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Re: How to store "3D" data? (data structure question)

[Sebastian Bassi]

On 20 Jul 2005 10:47:50 -0700, Graham  Fawcett <[EMAIL PROTECTED]> wrote:
> This looks a lot like 2D data (row/column), not 3D. What's the third
> axis? It looks, too, that you're not really interested in storage, but
> in analysis...

I think it as 3D like this:
1st axis: [MARKER]Name, like TDF1, TDF2.
2nd axis: Allele, like 181, 188 and so on.
3rd axis: Line: RHA280, RHA801.

I can have a star in MarkerName TDF1, Allele 181 and Line RHA280.
I can have an empty (o none) in TDF1, Allele 181 and Line RHA801.

What I like to know is what would be a suitable structure to handle this data?
thank you very much!

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Re: convert ascii escapes into binary form

[Hans-Peter Jansen]

Robert Kern wrote:

> Hans-Peter Jansen wrote:
>> Hi Pythonistas,
>> 
>> I need to convert ascii escapes into binary form, e.g.:
>> \f -> ^L
>> [EMAIL PROTECTED] -> [EMAIL PROTECTED]@
>> 
>> (rvalues in terminal representation)
>> 
>> Any idea, how to do this most elegantly in python?
>> Do I really need to do a search n'replace orgy, combined with
>> regex for this task?
> 
> In [11]: s = '\\f'
> 
> In [12]: s.decode('string_escape')
> Out[12]: '\x0c'

That did the trick, thanks a lot, Peter. Unfortunately, on the 
target system, there's still python 2.0 running :-( Looks like 
I've to bite the apple..

Pete
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Re: access the text being generated in other windows

[algebraist]

yeah, someone else mentioned getting the window's handle (can use
spyxx.exe for this) and then using hooks... but i'm not sure where to
go to learn about using window hooks, in python (or in general,
actually)...

is this 'downright dirty screen scraping'?

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EasyDialogs in MacOSX Tiger

[Ian A. York]

When I use EasyDialogs.Message in OSX (10.4.2), I have to manually switch 
to Python, the icon for which jumps in the dock until I click it.  This is 
the case using pythonw with either 2.3 or 2.4.  

This question has come up before ("EasyDialogs module problem with python 
2.4.1", April 18/05), and the answer that was give then was 

 One application is "active" at any point in time, and this application 
 controls the menu, has its windows displayed, and so on. So when the 
 Terminal.app is active, Python cannot be.

However, this is new behaviour.  Wen I used EasyDialogs in earlier 
versions of OSX (10.3 and 10.2) this did not happen; the EasyDialogs 
dialog box popped up at once with no further interaction required.  Unless 
MacOSX has changed its use of "active" applications, then, I think this 
explanation isn't correct.

Does anyone have any thoughts on how to make EasyDialogs work the way it 
used to in OS 10.3?  

Ian
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Re: OO design

[Terry Hancock]

On Wednesday 20 July 2005 07:22 am, chris wrote:
> Also minor clarifications::
> 
> > I'm hoping some of you python
> > lamas out there might be able to share some of your wisdom on the subject.
> 
> lama = guru = teacher(not a furry animal, although my dog has certainly
> taught me a few tricks ... like when to take her for a walk, when to play
> ball, and when its time for a tummy rub.)

Ah, of course.  My mistake. ;-)

--
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Anansi Spaceworks  http://www.anansispaceworks.com

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Re: How to store "3D" data? (data structure question)

[Sebastian Bassi]

On 20 Jul 2005 10:47:50 -0700, Graham  Fawcett <[EMAIL PROTECTED]> wrote:
> # zip is your friend here. It lets you iterate
> # across your line names and corresponding values
> # in parallel.

This zip function is new to me, the only zip I knew was pkzip :). So
will read about it.

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Printing a variable's name not its value

[travislspencer]

Hey,

I am trying to write a function that takes an arbitrary number of
arguments and does one of two things.  If the variable is a key in a
dictionary, it prints the key and its value.  Otherwise, if any of the
variables isn't in the dictionary, the function prints the variable's
name and value.

Here is what I have so far:

globals = {}
HOME_DIR = "The user's home directory"
SHELL = "The user's shell"

def someFunction():
someString = "This is a test"
globals[VERBOSE] = True
globals[HOME_DIR] = os.getenv("HOME")
globals[SHELL] = os.getenv("SHELL")

printVerbose(someString, HOME_DIR, SHELL)

def printVerbose(*args):
if VERBOSE in globals:
for a in args:
value = ""

if a in globals:
value = globals[a]
#else
#a = a.__name__
#value = a

print "%s: %s" % (a, value)

This prints something like this:

The user's home directory: /home/tspencer
The use's shell: zsh

But what I would like it to print is this:

The user's home directory: /home/tspencer
The use's shell: zsh
someString: This is a test

I've been told on #python that there isn't a way to get a variable's
name.  I hope this isn't so.  If it helps, I am trying to do something
like what the C preprocessor's # operator does.

TIA.

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Re: How to store "3D" data? (data structure question)

[Graham Fawcett]

Sebastian Bassi wrote:
> On 20 Jul 2005 10:47:50 -0700, Graham  Fawcett <[EMAIL PROTECTED]> wrote:
> > This looks a lot like 2D data (row/column), not 3D. What's the third
> > axis? It looks, too, that you're not really interested in storage, but
> > in analysis...
>
> I think it as 3D like this:
> 1st axis: [MARKER]Name, like TDF1, TDF2.
> 2nd axis: Allele, like 181, 188 and so on.
> 3rd axis: Line: RHA280, RHA801.
>
> I can have a star in MarkerName TDF1, Allele 181 and Line RHA280.
> I can have an empty (o none) in TDF1, Allele 181 and Line RHA801.

Okay. I think what will drive your data-structure question is the way
that you intend to use the data. Conceptually, it will always be 3D, no
matter how you model it, but trying to make a "3D data structure" is
probably not what is most efficient for your application.

If 90% of your searches are of the type, 'does TDF1/181/RHA280 have a
star?' then perhaps a dict using (name,allele,line) as a key makes most
sense:

  d = {('TDF1',181,'RHA280'):'*', ...}
  query = ('TDF1', 181, 'RHA280')
  assert query in d

Really, you don't need '*' as a value for this, just use None if you
like, since all the real useful info is in the keyspace of the dict.

If you're always querying based on line first, then something like my
earlier 'results' dict might make sense:

  d = {'RHA280':[('TDF1',181), ...], ...}
  for name, allele in d['RHA280']:
  if allele == 181:  # or some other "query" within
RHA280
  ...

You get the idea: model the data in the way that makes it most useable
to you, and/or most efficient (if this is a large data set).

But note that by picking a structure like this, you're making it easy
to do certain lookups, but possibly harder (and slower) to do ones you
hadn't thought of yet.

The general solution would be to drop it into a relational database and
use SQL queries. Multidimensional analysis is what relational DBs are
for, after all. A hand-written data structure is almost guaranteed to
be more efficient for a given task, but maybe the flexibility of a
relational db would help serve multiple needs, where a custom structure
may only be suitable for a few applications.

If you're going to roll your own structure, just keep in mind that
dict-lookups are very fast in Python, far more efficient than, e.g.,
checking for membership in a list.

Graham

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Re: Printing a variable's name not its value

[Simon Dahlbacka]

as you have been told, there is no way to get a variable's name, take a
look at http://effbot.org/zone/python-objects.htm to find out why this
is so.

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Re: How to store "3D" data? (data structure question)

[Sebastian Bassi]

On 20 Jul 2005 11:51:56 -0700, Graham  Fawcett <[EMAIL PROTECTED]> wrote:
> You get the idea: model the data in the way that makes it most useable
> to you, and/or most efficient (if this is a large data set).

I don't think this could be called a large dataset (about 40Kb all the file).
It would be an overkill to convert it in MySQL (or any *SQL).
I only need to parse it to reformat it.
May I send the text file to your email and a sample of the needed
output? It seems you understand a lot on this topic and you could do
it very easily (I've been all day trying to solve it without success
:(
I know this is not an usual request, but this would help me a lot and
I would learn with your code (I still trying to understand the zip
built-in function, that seems useful).




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wxPython && wxGlade

[Mike L.G.]

Hello!

Is there a way to span columns using wxGlade?
I'd like to get a layout that looks like
this:

|---|
||-||--||
||edit ||button||
||-||--||
||-||
||   button||
||-||
|---|

I would like the 2nd button on the 2nd row to
span to the 2nd column.  I've been able to span
rows and columns using wxGridBagSizer, but wxGlade does
not seem to offer this type of sizer.  Is
this layout visibly possible using wxGlade?
Thank you for your time.

-- 

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Re: OO design

[Florian Diesch]

chris <[EMAIL PROTECTED]> wrote:
> I've been scripting with python for a while now. Basically writing a few
> functions and running in the ipython shell. That's been very useful. But the
> more I do this the more I see that I'm doing more or less the same thing
> over and over again. So its feels like I need to get into class programming
> with all its attendant benefits. However my biggest problem is a conceptual
> one. I just can't get my head around defining suitable classes, how they
> aquire data and communicate with each other. I'm hoping some of you python
> lamas out there might be able to share some of your wisdom on the subject.

Just some thoughts about it:

> What I basically do is a lot of the following::
>
> 1. get arbitrary numerical data (typically large data sets in columnar
> format or even via COM from other packages. I generally have to deal with
> one or more sets of X,Y data)

You may create a class for each data format that reads that data and
creates a set from it.

> 2. manipulate the data (scaling, least squares fitting, means, peaks,
> add/subtract one XY set from another etc)

This methods may either manipulate youe set's data or create a new set
with the data

> 3. plot data (original set, results of manipulation, scatterplot, histograms
> etc  - I use matplotlib)

I never useds matplotlib. Maybe it's usefull to have one or more classes
covering the functions you need.

> 4. export data (print, csv, shelve)

Again have a class for each output format.


> I have no problem writing bits of functional code to do any of the above.
> But for the life of me I can't see how I can hook them altogether in an OO
> based framework that I can build and extend (with more data formats,
> manipulations, GUI etc).
>
> When I think about what I should do I end up with a class XY that has a
> method for everything I want to do eg.
>
> class XY:
>   def read_file
>   def scale_data
>   def plot_data
>   def shelve_data
>
> But somehow that doesn't feel right, especially when I expect the number of
> methods will grow and grow, which would make the class very unwieldy.
>
> Even if that was a legitimate option, I don't understand conceptualy how I
> would, for example, plot two different XY objects on the same graph or add
> them together point by point. How do two different XY objects communicate

Have a look at the IntervalSet module someone announced here some time
before to get some ideas.

> and how do you deal with the thing that they must have in common (the plot
> screen for example).

Create classes for this things. Then you may either pass XY to method of Thing
or the Thing to a method of XY.


   Florian
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Re: Python IDE

[Florian Diesch]

linuxfreak <[EMAIL PROTECTED]> wrote:
>Got going with python...and i must say its a pretty cool language.
> Been using Xemacs to write me programs. But I want an IDE that would

I'm using GNU emacs

> give me auto-completion, 

Read the manual about tags and abbrevs
Emacs Language Sensitive Editor (ELSE) 
looks interesting too.

> online help 

python-mode has C-c C-h for py-help-at-point

> and the like... Tried SPE and
> Dr.Pyhton but the former crashes regulary and the latter is quite
> unweildy and does not have a great many features. I quite like the UML
> feature found in SPE but the damn thing crashes way too often. What are
> you guys using and what do you think is the best IDE...or should i
> stick with Xemacs/emacs???

I don't like specialized IDE's as I'm using different languages and
don't want to switch my editor for them.

   Florian
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Re: Printing a variable's name not its value

[Bruno Desthuilliers]

[EMAIL PROTECTED] a écrit :
> Hey,
> 
> I am trying to write a function that takes an arbitrary number of
> arguments and does one of two things.  If the variable is a key in a
> dictionary, it prints the key and its value.  Otherwise, if any of the
> variables isn't in the dictionary, the function prints the variable's
> name and value.
> 
> Here is what I have so far:
> 
> globals = {}

globals() is a builtin function, you should no shadow it.

> HOME_DIR = "The user's home directory"
> SHELL = "The user's shell"
> 
> def someFunction():
> someString = "This is a test"
> globals[VERBOSE] = True
> globals[HOME_DIR] = os.getenv("HOME")
> globals[SHELL] = os.getenv("SHELL")
> 
> printVerbose(someString, HOME_DIR, SHELL)

-> printVerbose(HOME_DIR, SHELL, someString=someString)

> def printVerbose(*args):
def printVerbose(*args, **kwargs):

> if VERBOSE in globals:
> for a in args:
> if a in globals:
> value = globals[a]

  for k, v in kwargs:
> print "%s: %s" % (k, v)
> 

(snip)

> I've been told on #python that there isn't a way to get a variable's
> name.  I hope this isn't so.  

It is so. In fact, there is nothing like a 'variable' in Python. What we 
have are names bound to objects. Names 'knows' what objects are bound to 
them, but objects knows *nothing* about names they are bound to.
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Re: How to store "3D" data? (data structure question)

[Cyril Bazin]

The question of the type of the data sutructure depends of your use of the data. 
You could avoid some confusion without naming your columns "lines"...

Anyway, here is a piece of code that read the file and count the star on the fly:
(The result is a dict of dict of int.)

-
import itertools
import csv

f = open("toto.data") #change your file name
lineReader = csv.reader(f)
  
#Set the lines titles (RHA280, etc)
l = lineReader.next() 
linesTitles = l[2:]

#We construct the data structure and count the stars on the fly
datas = {}
for l in lineReader:
    name, allele = l[:2]
    if not allele: #empty line
    continue
    if name: #new block defining a TD*
    currentName = name
    d = dict.fromkeys(linesTitles, 0)
    datas[currentName] = d
    lines = l[2:]
    #add 1 to the lines not empty (<=> with a star)
    for title, value in itertools.izip(linesTitles,lines): 
    if value:
    d[title] += 1
    
#little tests
print datas
print datas["TDF1"]["RHA280"]
print datas["TDF3"]["RHA280"]
-
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Re: How to store "3D" data? (data structure question)

[Sebastian Bassi]

On 7/20/05, Cyril Bazin <[EMAIL PROTECTED]> wrote:
> The question of the type of the data sutructure depends of your use of the
> data. 
>  You could avoid some confusion without naming your columns "lines"...

Yes, that is because they are "plant lines", that is why is called "lines" :)

>  Anyway, here is a piece of code that read the file and count the star on
> the fly:
>  (The result is a dict of dict of int.)

THANK YOU, I will check it out!

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Re: Printing a variable's name not its value

[travislspencer]

Bruno Desthuilliers wrote:
> [EMAIL PROTECTED] a écrit :
> > globals = {}
>
> globals() is a builtin function, you should no shadow it.

Oh, woops.  I'll fix that.

> def printVerbose(*args, **kwargs):
>
> > if VERBOSE in globals:
> > for a in args:
> > if a in globals:
> > value = globals[a]
>
>   for k, v in kwargs:
> > print "%s: %s" % (k, v)
> >

Perfect.  Thanks for the pointer.

> > I've been told on #python that there isn't a way to get a variable's
> > name.  I hope this isn't so.
>
> It is so. In fact, there is nothing like a 'variable' in Python. What we
> have are names bound to objects. Names 'knows' what objects are bound to
> them, but objects knows *nothing* about names they are bound to.

OK.  This seems like it might take some getting used to.  Thanks again
for the help.

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Re: Printing a variable's name not its value

[travislspencer]

Simon Dahlbacka wrote:
> as you have been told, there is no way to get a variable's name, take a
> look at http://effbot.org/zone/python-objects.htm to find out why this
> is so.

Thanks, Simon, for the link.

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Re: is this pythonic?

[Caleb Hattingh]

Wow, I didn't know about enumerate.

Many thanks
Caleb

On Wed, 20 Jul 2005 15:19:50 +0200, Simon Brunning  
<[EMAIL PROTECTED]> wrote:

> On 7/20/05, Mage <[EMAIL PROTECTED]> wrote:
>> Or is there better way?
>>
>> for (i, url) in [(i,links[i]) for i in range(len(links))]:
>
> for i, url in enumerate(links):
>

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mod_python Apache/2.0.52 (Win32) Python 2.4

[Dieter Raber]

Hi there,

I am wondering if there is a mod_python for the above configuration. I
downloaded mod_python-3.1.3.win32-py2.3.exe, which of course as the
name implies keeps on asking me for a python 2.3 installation. I
imagine one could cheat a little bit with a fake registry entry that
says it was about python 2.3 but that points to python 2.4. Then again
I don't know what entry mod_python's installer is looking for.

Thanks for your help

Dieter
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Lots of pdf files

[Greg Lindstrom]

Hello-
I'm running Python 2.3 on a Linux system and have lots (about 2000) 
files in pdf format to print each day.  If I just wind up and fire all 
the files at the printer at once (as 2000 separate print jobs), the 
print server throws a fit and our system admin comes down and slaps me 
around for a few minutes (which, I guess, is fair).

There does not appear to be a simple way to merge many pdf's into one.  
I could, for example, merge all of the files for a particular provider 
into one pdf for that provider and then print it (or, better 
yet...encrypt it and ship it!), but I do not see a way.

Any suggestions?  As it stands now, I'm printing sending 200 files, 
waiting until the queue is clear, then another 200, and so forth.  
Eventually we will be paperless (if for no other reason this seems 
insane to me), but what can I do in the meantime?

Thanks for your help!

--greg

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returning list of strings from Python COM to Visual basic 6

[Philippe C. Martin]

Hi,

Is it possible ?

ex: return ['1','2']

If so which type should I use in VB ?

dim res as ???

Set testObj = CreateObject("")

res = testObj.AMethodThatReturnsAListOfStrings()


Thanks,

Philippe

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Re: wxPython && wxGlade

[Simon Dahlbacka]

basically, you can just stack an outer vertical box sizer with two
items and in the upper "slot" you put a horizontal box sizer with your
two buttons and in the bottom slot you put the big button

hope this helps

/Simon

ps. as this is a wxpython related question, you might get better
answers on the wxpython mailinglist (but afaik, this is the way this
particular thing is done).

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Re: convert ascii escapes into binary form

[Hans-Peter Jansen]

Hi Robert,

Hans-Peter Jansen wrote:
> Robert Kern wrote:
> 
> That did the trick, thanks a lot, Peter. Unfortunately, on the
s/Peter/Robert/g

Sorry, Robert. That's the price to pay for doing multiple replies at 
the same time. Mea culpa.. 

> target system, there's still python 2.0 running :-( Looks like
> I've to bite the apple..
> 
> Pete

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Re: is this pythonic?

[Bill Mill]

On 7/20/05, Simon Brunning <[EMAIL PROTECTED]> wrote:
> On 7/20/05, Mage <[EMAIL PROTECTED]> wrote:
> > Or is there better way?
> >
> > for (i, url) in [(i,links[i]) for i in range(len(links))]:
> 
> for i, url in enumerate(links):
> 

+2 for creating seeing a need and crafting a reasonable solution, but
-1 for not reading the section on builtins to see if it existed
already.

(As for its pythonicity, I would have recommended isolating it into a
function and making it a generator:

def my_enumerate(enumerable):
i = 0
for elt in enumerable:
yield (i, elt)
i += 1

for i, url in my_enumerate(links):

but it's not too bad as it is. Also, my function is completely
untested - it's close to right though.)

Peace
Bill Mill
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Re: is this pythonic?

[Bill Mill]

On 7/20/05, Bill Mill <[EMAIL PROTECTED]> wrote:
> On 7/20/05, Simon Brunning <[EMAIL PROTECTED]> wrote:
> > On 7/20/05, Mage <[EMAIL PROTECTED]> wrote:
> > > Or is there better way?
> > >
> > > for (i, url) in [(i,links[i]) for i in range(len(links))]:
> >
> > for i, url in enumerate(links):
> >
> 
> +2 for creating seeing a need and crafting a reasonable solution, but
> -1 for not reading the section on builtins to see if it existed
> already.
> 

-1 for me for not reading over my email before sending. "creating
seeing" should be "seeing".

Peace
Bill Mill
bill.mill at gmail.com
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Re: returning list of strings from Python COM to Visual basic 6

[Philippe C. Martin]

Sorry, it was in the book: Variant !

Regards;

Philippe



Philippe C. Martin wrote:

> Hi,
> 
> Is it possible ?
> 
> ex: return ['1','2']
> 
> If so which type should I use in VB ?
> 
> dim res as ???
> 
> Set testObj = CreateObject("")
> 
> res = testObj.AMethodThatReturnsAListOfStrings()
> 
> 
> Thanks,
> 
> Philippe

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Re: Printing a variable's name not its value

[tiissa]

Simon Dahlbacka wrote:
> as you have been told, there is no way to get a variable's name

Well, if you really want to, you can get all the names bound to a given 
object:


def get_names(obj):
 g = globals()
 names = []
 for name in g:
 if g[name] is obj:
 names.append(name)
 return names


Then you can play around:

  >>> list1 = []
  >>> list2 = [list1]
  >>> get_names(list2)
  ['list2']
  >>> list3 = list2
  >>> get_names(list2)
  ['list3', 'list2']
  >>> get_names(1)
  []
  >>> a = 1
  >>> get_names(1)
  ['a']
  >>> b = 1
  >>> get_names(1)
  ['a', 'b']
  >>> get_names(a)
  ['a', 'b']
  >>> c = 4/3.
  >>> d = 4/3.
  >>> get_names(c)
  ['c']
  >>> get_names(d)
  ['d']
  >>> get_names(4/3.)
  []
  >>>


But I wouldn't do it. If I want a name to be attached to some objects, I 
usually include it as a member/property of my class.
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Re: python certification

[Adrian Flanagan]

[EMAIL PROTECTED] wrote:
> i want to get a small certificate or diploma in python.

I can recommend brainbench.com (http://www.brainbench.com, of course)
for certifications that are both respected and reasonably priced.  Only
drawback:  their Python certification is for version 1.5!  They have
got to update that.

Lloyd Flanagan (Brainbench Master Certified in Python)

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Re: Lots of pdf files

[Wojciech Mula]

Greg Lindstrom wrote:
> There does not appear to be a simple way to merge many pdf's into one.  

Program pdftk can merge pdf's, but I have never tried it.
You may also use pdflatex --- there is a package called pdfpages
provides powerful command \includepdf.

w.
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Re: Printing a variable's name not its value

[travislspencer]

[EMAIL PROTECTED] wrote:
> Bruno Desthuilliers wrote:
> > def printVerbose(*args, **kwargs):
> >
> > > if VERBOSE in globals:
> > > for a in args:
> > > if a in globals:
> > > value = globals[a]
> >
  for k, v in kwargs.iteritems():
> > > print "%s: %s" % (k, v)
> > >
>
> Perfect.  Thanks for the pointer.

Well, almost perfect ;)

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looking for an introduction to python book

[David Fickbohm]

People,
I am looking for an introduction to python book.  Hopefully with a windows orientation
ThanksDaveDave FickbohmUse Technology to the Fullest1250 45th st suite 200Emeryville, CA, 94608510 594 4151 voice
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Re: What does "::" mean?

[Rob Williscroft]

Robert Kern wrote in news:mailman.1954.1121875043.10512.python-
[EMAIL PROTECTED] in comp.lang.python:

> [EMAIL PROTECTED] wrote:
>> Hi Robert,
>> I didn't succeed in reversing a string with the "full form" you
>> proposed:
>> live[len(live)-1:-1:-1] # where live="live"
>> The result is an empty string.
>> To  reverse "live" (in a "full form"), I have to put a char in front of
>> the string and...:
>> ('x'+live)[len(live)+1:0:-1]   # --> "evil"
>> Is it due to the Python's version (I still have 2.3.4)?
> 
> No, it's because I am stupid. There isn't a full form. 
> live[len(live)::-1] is the closest expansion.
> 

import sys

live = 'live'

print live[ sys.maxint  :  : -1 ]
print live[ len(live)-1 :  : -1 ]

print live[ len(live)-1 : -len(live)-1 : -1 ]
print live[ len(live)-1 : -sys.maxint  : -1 ]
print live[ sys.maxint  : -sys.maxint  : -1 ]
print live[ -1  : -len(live)-1 : -1 ]

Of course there is only one obvious way to do it, but alas
as I'm not Dutch I can't tell which it is.

Rob.
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Dr. Dobb's Python-URL! - weekly Python news and links (Jul 20)

[Simon Brunning]

QOTW: "Discussing goto statements and Microsoft together is like mixing
dynamite and gasoline." - DH

'"Spaghetti" doesn't quite describe it. I've settled on "Lovecraftian":
reading the code, you can't help but get the impression of writhing
tentacles and impossible angles.' - Robert Kern


Highlight of the week; Jython 2.2a1:

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/9c3b6b2e10d8a490

Nearly-highlight of the week; Simon Willison introduces Django, the
web framework for perfectionists with deadlines:
http://simon.incutio.com/archive/2005/07/17/django

But Jeff Shell remains more impressed with Subway:
http://griddlenoise.blogspot.com/2005/07/python-off-rails.html

CherryPy-2.1.0-beta released:

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/18f2e97ab515891

With all this web framework activity, what are people using?

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/63bdf6b93e1704d3

Bob Ippolito wonders; what happened to YAML?
http://bob.pythonmac.org/archives/2005/07/19/what-happened-to-yaml/

MKoool (!) is looking for the simplest way of stripping non-printable
characters from text:

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/23d6fdc3c9148725

Discovering WSGI and XSLT as middleware

http://www.decafbad.com/blog/2005/07/18/discovering_wsgi_and_xslt_as_middleware

Is there any worthwhile Python certification available? Is there any
worthwhile certification at all?

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/49dc79507ca4567d

Microsoft's very own Python scripts:

http://www.microsoft.com/technet/scriptcenter/scripts/python/pyindex.mspx

Another notable release; python-dateutil 1.0:

http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/7d0f044f1a3c8959



Everything Python-related you want is probably one or two clicks away in
these pages:

Python.org's Python Language Website is the traditional
center of Pythonia
http://www.python.org
Notice especially the master FAQ
http://www.python.org/doc/FAQ.html

PythonWare complements the digest you're reading with the
marvelous daily python url
 http://www.pythonware.com/daily  
Mygale is a news-gathering webcrawler that specializes in (new)
World-Wide Web articles related to Python.
 http://www.awaretek.com/nowak/mygale.html 
While cosmetically similar, Mygale and the Daily Python-URL
are utterly different in their technologies and generally in
their results.

For far, FAR more Python reading than any one mind should
absorb, much of it quite interesting, several pages index
much of the universe of Pybloggers.
http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
http://www.planetpython.org/
http://mechanicalcat.net/pyblagg.html

comp.lang.python.announce announces new Python software.  Be
sure to scan this newsgroup weekly.

http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous
tradition early borne by Andrew Kuchling, Michael Hudson and Brett
Cannon of intelligently summarizing action on the python-dev mailing
list once every other week.
http://www.python.org/dev/summary/

The Python Package Index catalogues packages.
http://www.python.org/pypi/

The somewhat older Vaults of Parnassus ambitiously collects references
to all sorts of Python resources.
http://www.vex.net/~x/parnassus/   

Much of Python's real work takes place on Special-Interest Group
mailing lists
http://www.python.org/sigs/

Python Success Stories--from air-traffic control to on-line
match-making--can inspire you or decision-makers to whom you're
subject with a vision of what the language makes practical.
http://www.pythonology.com/success

The Python Software Foundation (PSF) has replaced the Python
Consortium as an independent nexus of activity.  It has official
responsibility for Python's development and maintenance. 
http://www.python.org/psf/
Among the ways you can support PSF is with a donation.
http://www.python.org/psf/donate.html

Kurt B. Kaiser publishes a weekly report on faults and patches.
http://www.google.com/groups?as_usubject=weekly%20python%20patch
   
Cetus collects Python hyperlinks.
http://www.cetus-links.org/oo_python.html

Python FAQTS
http://python.faqts.com/

The Cookbook is a collaborative effort to capture useful and
interesting recipes.