On Thu, May 19, 2011 at 10:11 PM, Navkirat Singh wrote:
> Thanks Guys...I will look deeper into this. I thought I read somewhere that
> it was required in older python releases, but in newer releases it is not. I
> might be wrong though.
In Python 3.x all classes inherit from object by default, s
On Wed, 18 May 2011 07:19:08 +0200, Pascal J. Bourguignon wrote:
> Roland Hutchinson writes:
>
>> Sorry to have to contradict you,
>
> Don't be sorry.
>
>
>> but it really is a textbook example of recursion. Try this psuedo-code
>> on for size:
>>
>> FUNCTION DIR-DELETE (directory)
>> FOR
On Thu, 19 May 2011 22:13:14 -0700, rusi wrote:
> [I agree with you Xah that recursion is a technical word that should not
> be foisted onto lay users.]
I think that is a patronizing remark that under-estimates the
intelligence of lay people and over-estimates the difficulty of
understanding re
On Fri, 20 May 2011 05:48:50 +0100, Hans Georg Schaathun wrote:
> Either way, the assumption that your system will not be handled by
> idiots is only reasonable if you yourself is the only user.
Nonsense. How do you (generic "you", not any specific person) know that
you are not an idiot?
If you
〈English Idiom in Unix: Directory Recursively〉
http://xahlee.org/comp/idiom_directory_recursively.html
--
English Idiom in Unix: Directory Recursively
Xah Lee, 2011-05-17
Today, let's discuss something in the category of lingustics.
You know how in unix
A client wants to 'be lectured' on extending and embedding python on
windows.
I am familiar with this (or was until python2.3 or thereabouts) on
linux -- never done it on windows.
Can some kind soul point me to some link on the issues/pitfalls re
this?
I see three choices:
1. Us MS C for the C ex
AFAICS what emacs calls "recursive delete" is what the ordinary person
would simply call "delete". Presumably the non-recursive delete is
called simply "delete" but is actually something more complicated than
delete, and you're supposed to know what that is.
The "non-recursive delete" would be
On Wed, 18 May 2011 12:59:45 -0500, Victor Eijkhout wrote:
> Recursion: (N). See recursion. See also tail recursion.
caching proxy (n): If you already know what recursion is, this is the
same. Otherwise, see recursion.
ChrisA
--
http://mail.python.org/mailman/listinfo/python-list
On Thu, 19 May 2011 17:56:12 -0700, geremy condra wrote:
> TL;DR version: large systems have indeed been verified for their
> security properties.
How confident are we that the verification software is sufficiently bug-
free that we should trust their results?
How confident are we that the verif
Ethan Furman wrote:
> Several folk have said that objects that compare equal must hash equal,
> and the docs also state this
> http://docs.python.org/dev/reference/datamodel.html#object.__hash__
>
> I'm hoping somebody can tell me what horrible thing will happen if this
> isn't the case?
If you w
On Thu, May 19, 2011 at 11:58 PM, Steven D'Aprano
wrote:
> Sure, which is why the above fib() function will become increasing
> inaccurate beyond some given n, by memory about n=71 or so. Er, at least
> the fib() function that *was* above until you deleted most of it :)
>
> If you want an *accurat
2011/5/20 Ian Kelly :
> def fib_decimal(n):
> with localcontext() as ctx:
> ctx.prec = n // 4 + 1
> sqrt_5 = Decimal('5').sqrt()
> phi = (1 + sqrt_5) / 2
> numerator = (phi ** n) - (1 - phi) ** n
> return int((numerator / sqrt_5).to_integral_value())
Note that
Christoph Scheingraber wrote:
> On 2011-05-15, Thomas 'PointedEars' Lahn wrote:
>> Obviously. `signal' refers to an `int' object, probably by something
>> like
>>
>> signal = 42
>>
>> before. E.g. `print' or a debugger will tell you, as you have not showed
>> the relevant parts of the code.
>
I think what happens is that the “recursive” has become a idiom associated with
directory to such a degree that the unix people don't know what the fuck they
are talking about. They just simply use the word to go with directory whever
they mean the whole directory.
In the emacs case: “Recursiv
On 19/05/2011 21:40, Andrew Berg wrote:
On 2011.05.19 03:08 PM, Tim Golden wrote:
* A R_OK check always succeeds if the file's attributes can be read
at all
So is this the same as F_OK then, or does it return false if the user
isn't allowed to read permissions?
* A W_OK check fails if the
On 20/05/2011 09:21, Tim Golden wrote:
[... re os.access on Windows ...]
(Sorry; just got back to this this morning). I might raise this on
python-dev.
If you want to follow, my post is here:
http://mail.python.org/pipermail/python-dev/2011-May/111530.html
TJG
--
http://mail.python.org/ma
On 20 May 2011 06:55:35 GMT, Steven D'Aprano
wrote:
: On Thu, 19 May 2011 22:13:14 -0700, rusi wrote:
:
: > [I agree with you Xah that recursion is a technical word that should not
: > be foisted onto lay users.]
:
: I think that is a patronizing remark that under-estimates the
: intellige
On 20 May 2011 07:04:27 GMT, Steven D'Aprano
wrote:
: On Fri, 20 May 2011 05:48:50 +0100, Hans Georg Schaathun wrote:
:
: > Either way, the assumption that your system will not be handled by
: > idiots is only reasonable if you yourself is the only user.
:
: Nonsense. How do you (generic "yo
On 20.5.2011 3:38, Pascal J. Bourguignon wrote:
t...@sevak.isi.edu (Thomas A. Russ) writes:
"Pascal J. Bourguignon" writes:
t...@sevak.isi.edu (Thomas A. Russ) writes:
This will only work if there is a backpointer to the parent.
No, you don't need backpointers; some cases have been menti
On Mon, May 16, 2011 at 9:06 AM, Littlefield, Tyler wrote:
> I'm putting lots of work into this. I would rather not have some script
> kiddy dig through it, yank out chunks and do whatever he wants. I just want
> to distribute the program as-is, not distribute it and leave it open to
> being hacke
> Hi,
> I'm using python2.5 in maya 2009 x64 (in linux).
For Maya/Python stuff you'll probably have more success at
http://www.tech-artists.org/
Cheers,
Drea
--
http://mail.python.org/mailman/listinfo/python-list
> def turnOffMonitor():
> SC_MONITORPOWER = 0xF170
> win32gui.SendMessage(win32con.HWND_BROADCAST,
> win32con.WM_SYSCOMMAND, SC_MONITORPOWER, 2)
This code does not return control to you, so programm still locked. In my
opinion it due broadcasting message. But I do not know how to send message
@Astan
If you really want to turn your monitor on and off, you should probably try
pyserial are pyparrallel(http://pyserial.sourceforge.net/pyparallel.html),
along with a solid state relay. That worked for me on linux not sure about
windowXP,but it should work.
On Sat, May 14, 2011 at 1:08 AM, As
There is a nice matrix representation of consecutive Fibonacci
numbers: [[1, 1], [1, 0]] ** n = [[F_n+1, F_n], [F_n, F_n-1]]. Using
the third party mpmath module, which uses arbitrary precision floating
point arithmetic, we can calculate the n'th Fibonacci number for an
arbitrary n as follows:
imp
Hi Tim,
Thanks for the reply and suggestions. I followed the patch provided by
you in issue 2528, but the code looks very tricky to me. Anyways I wrote
my Test.py script & tried only the def test_access_w(self): test case
which is defined under class FileTests(unittest.TestCase) by providing
my
Many times when I am writing some program in python, I notice that I
could transform my list into set, then use the set methods like union,
intersection, set equality etc. , and it will solve my problem easily.
But then I realize that if I transform my list into set, it will
remove duplicates of el
> Many times when I am writing some program in python, I notice that I
> could transform my list into set, then use the set methods like union,
> intersection, set equality etc. , and it will solve my problem easily.
> But then I realize that if I transform my list into set, it will
> remove duplic
> For example, I was writing a program to detect whether two strings are
> anagrams of each other. I had to write it like this:
>
> def isAnagram(w1, w2):
> w2=list(w2)
> for c in w1:
> if c not in w2:
> return False
> else:
> w2.remove(c)
> return True
>
> But if there
On Fri, May 20, 2011 at 9:37 PM, ErichCart ErichCart
wrote:
> For example, I was writing a program to detect whether two strings are
> anagrams of each other. I had to write it like this:
>
> def isAnagram(w1, w2):
> w2=list(w2)
> for c in w1:
> if c not in w2:
> return False
> else:
I see! How could I overlook sorting ))
It seems that collections.Counter is what I was talking about. It
seems to support all the set operations.
Also I realized that the data structure which i was describing is
called miltiset, and collections.Counter is python implementation of
multiset.
--
ht
Miki Tebeka wrote:
> The best module for doing such things is subprocess. And the Popen object
> has a pid attribute
I knew that, it's my fault that I'm not good to manage with popen. I found
simplier to use subprocess.getstatusoutput. Maybe this function doesn't
return the child pid, so I shou
On 20/05/2011 07:33, Ulrich Eckhardt wrote:
Ethan Furman wrote:
Several folk have said that objects that compare equal must hash equal,
and the docs also state this
http://docs.python.org/dev/reference/datamodel.html#object.__hash__
I'm hoping somebody can tell me what horrible thing will happe
On Sat, May 21, 2011 at 1:50 AM, MRAB wrote:
> [snip]
> Is this strictly true? I thought that the hash value, an integer, is
> moduloed (Is that how you spell it? Looks weird!) with the number of
> array elements to give an index into the array, so different hashes
> could give the same index, and
On Fri, May 20, 2011 at 12:10 AM, Steven D'Aprano
wrote:
> On Thu, 19 May 2011 17:56:12 -0700, geremy condra wrote:
>
>> TL;DR version: large systems have indeed been verified for their
>> security properties.
>
> How confident are we that the verification software is sufficiently bug-
> free that
On Fri, May 20, 2011 at 9:20 AM, Chris Angelico wrote:
> On Sat, May 21, 2011 at 1:50 AM, MRAB wrote:
> > [snip]
> > Is this strictly true? I thought that the hash value, an integer, is
> > moduloed (Is that how you spell it? Looks weird!) with the number of
> > array elements to give an index i
I thought this essay on why one startup chose Python was interesting.
http://www.quora.com/Why-did-Quora-choose-Python-for-its-development
PHP was out of the question. Facebook is stuck on that for legacy
reasons, not because it's the best choice right now.[1] Our main
takeaway from that experien
On Fri, 20 May 2011 16:54:06 +1000, Chris Angelico wrote:
> If someone has time to kill (as if!), it'd be awesome to get a new
> numeric type that uses bc's code; any other numeric type (int, long,
> float) could autopromote to it, removing the dilemma of which to promote
> out of long and float.
On May 20, 1:48 pm, Hans Georg Schaathun wrote:
> On 20 May 2011 06:55:35 GMT, Steven D'Aprano
> wrote:
>
> : On Thu, 19 May 2011 22:13:14 -0700, rusi wrote:
> :
> : > [I agree with you Xah that recursion is a technical word that should not
> : > be foisted onto lay users.]
> :
> : I think th
Chris Rebert wrote:
On Thu, May 19, 2011 at 10:43 PM, Ethan Furman wrote:
Several folk have said that objects that compare equal must hash equal, and
the docs also state this
http://docs.python.org/dev/reference/datamodel.html#object.__hash__
I'm hoping somebody can tell me what horrible thing
Peter Otten wrote:
Ethan Furman wrote:
Several folk have said that objects that compare equal must hash equal,
and the docs also state this
http://docs.python.org/dev/reference/datamodel.html#object.__hash__
I'm hoping somebody can tell me what horrible thing will happen if this
isn't the case
On Fri, 20 May 2011 07:10:45 +, Steven D'Aprano wrote:
> How confident are we that the verification software tests every possible
> vulnerability,
Formal verification is based upon mathematical proof, not empirical
results.
As Dijkstra said: "Program testing can be used to show the presence
This is probably somewhat off-topic, but where would I find a list of
what each error code in WindowsError means? WindowsError is so broad
that it could be difficult to decide what to do in an except clause.
Fortunately, sys.exc_info()[1][0] holds the specific error code, so I
could put in an if...
On Fri, May 20, 2011 at 10:36 AM, Chris Kaynor wrote:
> I think the question was: can this dummy code ever produce a set containing
> less then itemCount items (for 0 < itemCount < 2**32)?
In CPython, no. Even when you get a hash collision, the code checks
to see whether the hashes are actually
On 20 May 2011 18:21, rusi wrote:
> On May 20, 1:48 pm, Hans Georg Schaathun wrote:
> > On 20 May 2011 06:55:35 GMT, Steven D'Aprano <
> steve+comp.lang.pyt...@pearwood.info> wrote:
> >
> > : On Thu, 19 May 2011 22:13:14 -0700, rusi wrote:
> > :
> > : > [I agree with you Xah that recursion is
I've just done an update to my system here to Ubuntu 11.04. Mostly no
problems ... but I have an important (to me) python/TK program that's
stopped working. Well, it works ... mostly.
The python version is 2.7.1+ (no idea what the + means!).
I _think_ I have traced the problem to certain menus wh
Ulrich Eckhardt wrote:
Ethan Furman wrote:
Several folk have said that objects that compare equal must hash equal,
and the docs also state this
http://docs.python.org/dev/reference/datamodel.html#object.__hash__
I'm hoping somebody can tell me what horrible thing will happen if this
isn't the c
hello,
using datetimes from a lot of different sources,
in many languages,
I had about 30 python helper routines,
which I now packed in one class,
much simpler.
Although I used the Delphi date-format as the base,
it shouldn't be difficult to rewrite the class for another type.
The input can be on
Ethan Furman wrote:
Several folk have said that objects that compare equal must hash equal,
and the docs also state this
http://docs.python.org/dev/reference/datamodel.html#object.__hash__
Two things I didn't make clear originally:
I'm using Python3.
My objects (of type Wierd) obey the prem
On Fri, May 20, 2011 at 10:07 AM, Steven D'Aprano
wrote:
> On Fri, 20 May 2011 16:54:06 +1000, Chris Angelico wrote:
>
>> If someone has time to kill (as if!), it'd be awesome to get a new
>> numeric type that uses bc's code; any other numeric type (int, long,
>> float) could autopromote to it, re
On Fri, May 20, 2011 at 10:56 AM, Ethan Furman wrote:
> Chris Rebert wrote:
>> On Thu, May 19, 2011 at 10:43 PM, Ethan Furman wrote:
>>> Several folk have said that objects that compare equal must hash equal,
>>> and
>>> the docs also state this
>>> http://docs.python.org/dev/reference/datamodel.
Am 20.05.2011 17:50, schrieb MRAB:
> Is this strictly true? I thought that the hash value, an integer, is
> moduloed (Is that how you spell it? Looks weird!) with the number of
> array elements to give an index into the array, so different hashes
> could give the same index, and objects with differ
The current ABC implementation in Python implies that the class of a
conformant instance complies with the ABC. The implication does not carry
down to the compliance of the instance itself.
This means that if you inherit from an ABC that has an abstract property,
your subclass must have a matchin
On Fri, May 20, 2011 at 12:03 PM, bvdp wrote:
> All this is fine (and worked perfectly before my upgrade). The menu
> items which are ordinary functions continue to work. BUT the callbacks
> which are classes are just ignored when they are clicked.
I'm not a tk user, but it sounds like it has reg
In article ,
Chris Angelico wrote:
>On Sat, May 7, 2011 at 7:21 PM, Gregory Ewing
> wrote:
>> Hans Georg Schaathun wrote:
>>
>>> You cannot reference nor manipulate a reference in python, and that IMHO
>>> makes them more abstract.
>>
>> You can manipulate them just fine by moving them
>> from on
In article <4dc7fa2f$0$29991$c3e8da3$54964...@news.astraweb.com>,
Steven D'Aprano wrote:
>On Mon, 09 May 2011 12:52:27 +1200, Gregory Ewing wrote:
>
>> Steven D'Aprano wrote:
>>
>>> Since you haven't explained what you think is happening, I can only
>>> guess.
>>
>> Let me save you from guessing.
On 20/05/2011 18:56, Andrew Berg wrote:
This is probably somewhat off-topic, but where would I find a list of
what each error code in WindowsError means?
Assuming it's a Win32 error code, winerror.h from the Platform SDK holds
the answer. One version is linked below, it's in theory out of date
On 20/05/2011 20:01, Christian Heimes wrote:
Am 20.05.2011 17:50, schrieb MRAB:
Is this strictly true? I thought that the hash value, an integer, is
moduloed (Is that how you spell it? Looks weird!) with the number of
array elements to give an index into the array, so different hashes
could give
On 20/05/2011 18:56, Andrew Berg wrote:
This is probably somewhat off-topic, but where would I find a list of
what each error code in WindowsError means? WindowsError is so broad
that it could be difficult to decide what to do in an except clause.
Fortunately, sys.exc_info()[1][0] holds the speci
Ethan Furman wrote:
> Peter Otten wrote:
>> Ethan Furman wrote:
>>
>>> Several folk have said that objects that compare equal must hash equal,
>>> and the docs also state this
>>> http://docs.python.org/dev/reference/datamodel.html#object.__hash__
>>>
>>> I'm hoping somebody can tell me what horr
Steven D'Aprano wrote:
Nonsense. How do you (generic "you", not any specific person) know that
you are not an idiot?
lol Sum, ergo Idiot cogitat.
Reminds me of a philosophical story I heard one time from my religion
professor...
... as it goes, De Carte leads his horse into town ;-)
On Fri, May 20, 2011 at 19:39, Beliavsky wrote:
> I thought this essay on why one startup chose Python was interesting.
>
> http://www.quora.com/Why-did-Quora-choose-Python-for-its-development
>
> PHP was out of the question. Facebook is stuck on that for legacy
> reasons, not because it's the bes
Peter Otten wrote:
Ethan Furman wrote:
Peter Otten wrote:
Ethan Furman wrote:
Several folk have said that objects that compare equal must hash equal,
and the docs also state this
http://docs.python.org/dev/reference/datamodel.html#object.__hash__
--> class Wierd():
... def __init__(self
On 2011.05.20 02:47 PM, Genstein wrote:
> On 20/05/2011 18:56, Andrew Berg wrote:
> > This is probably somewhat off-topic, but where would I find a list of
> > what each error code in WindowsError means?
>
> Assuming it's a Win32 error code, winerror.h from the Platform SDK holds
> the answer. One
> I'm not a tk user, but it sounds like it has regressed from accepting
> arbitrary callables as callbacks to accepting functions specifically.
>
> What happens if you replace:
>
> ("Favorites", selectFav),
>
> with:
>
> ("Favorites", lambda: selectFav()),
Okay, this works. Great and thanks! Seem
On Fri, May 20, 2011 at 4:12 PM, bvdp wrote:
> Okay, this works. Great and thanks! Seems to me that the way I was
> doing it should be alright ... and I've got some other programs
> exhibiting the same problem.
>
> Before I go "fixing" the issue ... is this known or even a bug?
The docs [1] say t
On Fri, May 20, 2011 at 1:24 PM, harrismh777 wrote:
> Steven D'Aprano wrote:
>>
>> Nonsense. How do you (generic "you", not any specific person) know that
>> you are not an idiot?
>
> lol Sum, ergo Idiot cogitat.
>
>
> Reminds me of a philosophical story I heard one time from my religion
> pro
On Thu, May 19, 2011 at 11:33 PM, Eric Snow wrote:
> Thinking about class APIs and validating a class against an API. The abc
> module provides the tools to do some of this. One thing I realized, that I
> hadn't noticed before, is that the abstractness of a class is measured when
> instances of
Probably the fix is to use a function :)
> The docs [1] say that a callback is a function, so I guess that if it
> worked before it was just luck. You should bring it up on the tkinter
> list and see what they have to say about it, though.
>
> I'm a bit confused about why you would want to use a
On Fri, May 20, 2011 at 5:07 PM, bvdp wrote:
> You mention the tkinter group. Ummm, what group is that???
http://tkinter.unpythonic.net/wiki/TkinterDiscuss
--
http://mail.python.org/mailman/listinfo/python-list
On May 20, 4:29 pm, Ian Kelly wrote:
> On Fri, May 20, 2011 at 5:07 PM, bvdp wrote:
> > You mention the tkinter group. Ummm, what group is that???
>
> http://tkinter.unpythonic.net/wiki/TkinterDiscuss
Thanks. New one for me. I'll subscribe and see if they know about
this.
Best,
--
http://mail.
On May 20, 6:07 pm, bvdp wrote:
> Probably the fix is to use a function :)
>
> > The docs [1] say that a callback is a function, so I guess that if it
> > worked before it was just luck. You should bring it up on the tkinter
> > list and see what they have to say about it, though.
>
> > I'm a bit
On Fri, May 20, 2011 at 4:55 PM, Eric Snow wrote:
>
> I have revised this and made a recipe for it:
>
>
> http://code.activestate.com/recipes/577711-validating-classes-and-objects-against-an-abstract/
>
>
I also added this:
http://code.activestate.com/recipes/577712-adding-__implements__-to-subcl
On Sat, May 21, 2011 at 3:07 AM, Steven D'Aprano
wrote:
> On Fri, 20 May 2011 16:54:06 +1000, Chris Angelico wrote:
>
>> If someone has time to kill (as if!), it'd be awesome to get a new
>> numeric type that uses bc's code; any other numeric type (int, long,
>> float) could autopromote to it, rem
On Fri, 20 May 2011 21:17:29 +0100, MRAB wrote:
> On 20/05/2011 20:01, Christian Heimes wrote:
>> Am 20.05.2011 17:50, schrieb MRAB:
>>> Is this strictly true? I thought that the hash value, an integer, is
>>> moduloed (Is that how you spell it? Looks weird!) ...
>>
>> I don't think 'moduloed' is
Hello to all you Pythoneers and Pythonistas,
I'm happy to announce the availability of Python 2.6.7 release candidate 2.
Release candidate 1 was not widely announced due to a mismatch between the
Mercurial and Subversion branches. Barring any unforeseen issues, this will
be the last release candi
On Fri, 20 May 2011 15:45:03 -0700, geremy condra wrote:
> On Fri, May 20, 2011 at 1:24 PM, harrismh777
> wrote:
>> ... as it goes, De Carte leads his horse into town ;-) and having
>> hitched it to the rail outside the local saloon and sauntering up to
>> the bar, the tender asks, "Would yo
On 21/05/2011 01:47, Steven D'Aprano wrote:
On Fri, 20 May 2011 21:17:29 +0100, MRAB wrote:
On 20/05/2011 20:01, Christian Heimes wrote:
Am 20.05.2011 17:50, schrieb MRAB:
Is this strictly true? I thought that the hash value, an integer, is
moduloed (Is that how you spell it? Looks weird!) ..
On Sat, 21 May 2011 02:02:48 +0100, MRAB wrote:
> On 21/05/2011 01:47, Steven D'Aprano wrote:
>> On Fri, 20 May 2011 21:17:29 +0100, MRAB wrote:
>>
>>> On 20/05/2011 20:01, Christian Heimes wrote:
Am 20.05.2011 17:50, schrieb MRAB:
> Is this strictly true? I thought that the hash value, a
Barry Warsaw wrote:
We will support Python 2.6 in security-fix only mode until
October 2013.
Where can I read about the criteria for security-fix only?
Who decides whether the security fix is critical?
thanks,
kind regards,
m harris
--
http://mail.python.org/mailman/listinfo/python-list
Steven D'Aprano wrote:
... as it goes, De Carte leads his horse into town;-)and having
>> hitched it to the rail outside the local saloon and sauntering up to
>> the bar, the tender asks, "Would you be hav'in an ale sir?"
>>
>> ... De Carte replies, "I think not..." ... and then disap
On Thu, May 19, 2011 at 9:32 PM, TheSaint wrote:
> hello,
>
> I'm using to launch a program by subprocess.getstatusoutput. I'd like to
> know whether I can get the program ID, in order to avoid another launch.
>
> For clarity sake, I'm calling aria2 (the download manager for linux) and I
> wouldn'
On 11May2011 13:37, James Mills wrote:
| On Tue, May 10, 2011 at 7:34 PM, Jean-Michel Pichavant
| wrote:
| > You can reraise the exception without loosing the stack trace.
| >
| > try:
| > ...
| > except SomeException, exc:
| > log(exc)
| > print 'Hello world'
| > raise # "raise exc" would loose
In article ,
harrismh777 wrote:
> Barry Warsaw wrote:
> > We will support Python 2.6 in security-fix only mode until
> > October 2013.
> Where can I read about the criteria for security-fix only?
You can read about the Python development cycle and security branches in
the Python Developer's
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