Paul Rubin wrote:
> Steven D'Aprano writes:
>> I'm sorry, but the instant somebody says "eliminate the GIL", they lose
>> credibility with me. Yes yes, I know that in *your* specific case you've
>> done your research and (1) multi-threaded code is the best solution for
>> your application and (2)
On Mon Feb 23 2015 at 4:15:42 PM Paul Rubin wrote:
>
> What do you mean about Queues working with processes? I meant
> Queue.Queue. There is multiprocessing.Queue but that's much less
> capable, and it uses cumbersome IPC like pipes or sockets instead of a
> lighter weight lock. Threads can als
On Sun, Feb 22, 2015 at 7:22 AM, Cem Karan wrote:
>
> On Feb 22, 2015, at 5:15 AM, Gregory Ewing
> wrote:
>
>> Frank Millman wrote:
>>> "In order to inform users that certain bits of state have changed, I
>>> require them to register a callback with my code."
>>> This sounds to me like a pub/su
Terry Reedy :
> On 2/22/2015 4:25 PM, Marko Rauhamaa wrote:
>> This is a true statement:
>>
>> If X is Y, then id(X) == id(Y).
>>
>> However, this is generally not a true statement:
>>
>> If X is Y, then id(X) is id(Y).
>
> If X and Y exist at the *same time*, then (X is Y) == (id(X) is id
On 2/22/2015 7:45 AM, Dave Farrance wrote:
As an engineer, I can quickly knock together behavioural models of
electronic circuits, complete units, and control systems in Python, then
annoyingly in a few recent cases, have to re-write in C for speed.
I've tried PyPy, the just-in-time compiler fo
On 02/22/2015 10:02 PM, Terry Reedy wrote:
On 2/22/2015 4:25 PM, Marko Rauhamaa wrote:
LJ :
id(b[0])
4582
[...]
id(b[2])
4582
Please correct me if I am wrong, but according to this b[2] and b[0]
are the same object. Now,
b[0] is b[2]
False
This is a true statement:
If
Ryan Stuart writes:
> I think that is a pretty accurate summary. In fact, the article even
> says that. So, just to iterate its point, if you are using
> non-blocking Queues to communicate to these threads, then you just
> have a communicating event loop. Given that Queues work perfectly with
> wi
On 2/22/2015 12:53 PM, LJ wrote:
Hi everyone. Quick question here. Lets suppose if have the
following numpy array:
b=np.array([[0]*2]*3)
and then:
id(b[0])
4582
id(b[1])
45857512
id(b[2])
4582
Please correct me if I am wrong,
You are, as other explained
> but according to th
On 2/22/2015 4:25 PM, Marko Rauhamaa wrote:
LJ :
id(b[0])
4582
[...]
id(b[2])
4582
Please correct me if I am wrong, but according to this b[2] and b[0]
are the same object. Now,
b[0] is b[2]
False
This is a true statement:
If X is Y, then id(X) == id(Y).
However, this
On Mon Feb 23 2015 at 1:50:40 PM Paul Rubin wrote:
> That article is about the hazards of mutable state shared between
> threads. The key to using threads safely is to not do that. So the
> "transfer" example in the article would instead be a message handler in
> the thread holding the account
Ryan Stuart writes:
> Many people have written at length about why it's bad. The most recent
> example I have come across is here ->
> https://glyph.twistedmatrix.com/2014/02/unyielding.html
That article is about the hazards of mutable state shared between
threads. The key to using threads safel
Chris Angelico writes:
> That said, though, there's probably a lot of code out there that
> depends on backslashes being non-special, so it's quite probably
> something that can't be changed. But it'd be nice to be able to turn
> on a warning for it.
If you're motivated to see such warnings, an
On Mon, Feb 23, 2015 at 2:16 PM, Ryan Stuart wrote:
> Many people have written at length about why it's bad. The most recent
> example I have come across is here ->
> https://glyph.twistedmatrix.com/2014/02/unyielding.html
>
> It's not a specific Python problem. I must be in the limited crowd that
On Mon, Feb 23, 2015 at 1:41 PM, Ben Finney wrote:
> Right. Text strings literals are documented to work that way
> https://docs.python.org/3/library/stdtypes.html#text-sequence-type-str>,
> which refers the reader to the language reference
> https://docs.python.org/3/reference/lexical_analysis.ht
On Mon Feb 23 2015 at 12:05:46 PM Paul Rubin
wrote:
> I don't see what the big deal is. I hear tons of horror stories about
> threads and I believe them, but the thing is, they almost always revolve
> around acquiring and releasing locks in the wrong order, forgetting to
> lock things, stuff lik
On 02/22/2015 09:38 PM, Dave Angel wrote:
On 02/22/2015 08:13 PM, jkuplin...@gmail.com wrote:
OK (1) sorry about for/from
That's not what you should be sorry about. You should be sorry you
didn't use cut&paste.
(2) print() sounds nice, but fact is , no matter what I try, i always
get C:\\a
On 02/22/2015 09:41 PM, Ben Finney wrote:
Chris Angelico writes:
In Python, unrecognized escape sequences are treated literally,
without (as far as I can tell) any sort of warning or anything.
Right. Text strings literals are documented to work that way
https://docs.python.org/3/library/stdt
On Mon, Feb 23, 2015 at 1:41 PM, Ben Finney wrote:
> Chris Angelico writes:
>
>> Why is it that Python interprets them this way, and doesn't even give
>> a warning?
>
> Because the interpretation of those literals is unambiguous and correct.
And it also implies that never, in the entire infinite
Laura Creighton writes:
> And given that Lennart is a friend, well really a good friend of my
> lover and a something-better- than-an-acquaintance with me I
> should make the effort to get these two under the same roof (mine, by
> preference) for the fun of the experience.
Oh cool, right, I
On 02/22/2015 09:29 PM, Chris Angelico wrote:
In Python, unrecognized escape sequences are treated literally,
without (as far as I can tell) any sort of warning or anything. This
can mask bugs, especially when Windows path names are used:
'C:\sqlite\Beginner.db'
'C:\\sqlite\\Beginner.db'
'c:\
Chris Angelico writes:
> In Python, unrecognized escape sequences are treated literally,
> without (as far as I can tell) any sort of warning or anything.
Right. Text strings literals are documented to work that way
https://docs.python.org/3/library/stdtypes.html#text-sequence-type-str>,
which r
On 02/22/2015 08:13 PM, jkuplin...@gmail.com wrote:
OK (1) sorry about for/from
That's not what you should be sorry about. You should be sorry you
didn't use cut&paste.
(2) print() sounds nice, but fact is , no matter what I try, i always get
C:\\apps instead of c:\apps. So in this sense
In Python, unrecognized escape sequences are treated literally,
without (as far as I can tell) any sort of warning or anything. This
can mask bugs, especially when Windows path names are used:
>>> 'C:\sqlite\Beginner.db'
'C:\\sqlite\\Beginner.db'
>>> 'c:\sqlite\beginner.db'
'c:\\sqlite\x08eginner.
On Mon, Feb 23, 2015 at 1:04 PM, Paul Rubin wrote:
>> if you're running single-thread code on a single-core machine and
>> still complaining about the GIL, you have no clue.
>
> Even the Raspberry Pi has 4 cores now, and fancy smartphones have had
> them for years. Single core cpu's are specializ
Steven D'Aprano writes:
> I'm sorry, but the instant somebody says "eliminate the GIL", they lose
> credibility with me. Yes yes, I know that in *your* specific case you've
> done your research and (1) multi-threaded code is the best solution for
> your application and (2) alternatives aren't suit
LJ wrote:
> Hi everyone. Quick question here. Lets suppose if have the following numpy
> array:
>
> b=np.array([[0]*2]*3)
>
> and then:
>
id(b[0])
> 4582
id(b[1])
> 45857512
id(b[2])
> 4582
>
> Please correct me if I am wrong, but according to this b[2] and b[0] are
> th
On Mon, Feb 23, 2015 at 12:13 PM, wrote:
> (2) print() sounds nice, but fact is , no matter what I try, i always get
> C:\\apps instead of c:\apps. So in this sense print() doesn't help much.
> Obviously i'm doing something wrong -- which is what you perhaps call shotgun
> debugging; but that'
Paul Rubin wrote:
> Laura Creighton writes:
>> Because one thing we do know is that people who are completely and
>> utterly ignorant about whether having multiple cores will improve
>> their code still want to use a language that lets them use the
>> multiple processors. If the TM dream of havi
On Sunday, February 22, 2015 at 5:22:24 PM UTC-5, Chris Angelico wrote:
> On Mon, Feb 23, 2015 at 9:06 AM, wrote:
> > I thought this would be easy:
> >
> >
> > for subprocess import call
> > call (['cd', r'C:\apps'], shell = True)
> >
> >
> > It doesn't work -- tried with/without prefix r, escape
On Sat, 21 Feb 2015 16:22:36 +0100, Peter Otten <__pete...@web.de>
wrote:
>
>Why would you care about a few lines? You don't repeat them, do you? Put the
>code into a function or a context manager and invoke it with
Thanks for the suggestions that followed.
--
https://mail.python.org/mailman/li
On Sun, 22 Feb 2015 13:15:09 -0600, Skip Montanaro
wrote:
>
>Sorry, I haven't paid careful attention to this thread, so perhaps
>this has already been suggested, however... Can't you write your own
>class which delegates to the necessary sqlite3 bits and has a context
>manager with the desired be
On Sun, 22 Feb 2015 19:07:03 +, Mark Lawrence
wrote:
>
>Looks like you're correct. Knock me down with a feather, Clevor Trevor.
It took me by surprise when I first encountered it too. The rationale
apparently is that the context manager is strictly a transactional
feature, allowing for mult
On Mon, Feb 23, 2015 at 9:29 AM, Laura Creighton wrote:
> But that is not so surprising. How many people use WeakSets for
> _anything_? I've never used them, aside from 'ooh! cool shiny
> new language feature! Let's kick it around the park!' That people
> aren't familiar with WeakSets doesn't
In a message of Sun, 22 Feb 2015 17:09:01 -0500, Cem Karan writes:
>Documentation is a given; it MUST be there. That said, documenting
>something, but still making it surprising, is a bad idea. For
>example, several people have been strongly against using a WeakSet to
>hold callbacks because the
On Mon, Feb 23, 2015 at 9:06 AM, wrote:
> I thought this would be easy:
>
>
> for subprocess import call
> call (['cd', r'C:\apps'], shell = True)
>
>
> It doesn't work -- tried with/without prefix r, escaped backslashes, triple
> quotes, str(), .. nothing seems to work (it doesn't complain, but
On 22/02/2015 22:06, jkuplin...@gmail.com wrote:
Hi,
I thought this would be easy:
for subprocess import call call (['cd', r'C:\apps'], shell = True)
It doesn't work -- tried with/without prefix r, escaped backslashes,
triple quotes, str(), .. nothing seems to work (it doesn't complain,
but
In a message of Sun, 22 Feb 2015 12:14:45 -0800, Paul Rubin writes:
>Laura Creighton writes:
>> The GIL isn't going away from PyPy any time real soon, alas.
>
>I thought the GIL's main purpose was to avoid having to lock all the
>CPython refcount updates, so if PyPy has tracing GC, why is there st
Hi,
I thought this would be easy:
for subprocess import call
call (['cd', r'C:\apps'], shell = True)
It doesn't work -- tried with/without prefix r, escaped backslashes, triple
quotes, str(), .. nothing seems to work (it doesn't complain, but it doesn't
change directories either) -- what am
On Feb 22, 2015, at 4:34 PM, Marko Rauhamaa wrote:
> Cem Karan :
>
>> My goal is to make things as pythonic (whatever that means in this
>> case) and obvious as possible. Ideally, a novice can more or less
>> guess what will happen with my API without really having to read the
>> documentation
Good news -- it seems to be working fine with PyPy.
https://travis-ci.org/hugovk/Pillow/builds
for me, not extensively tested, it just seems to be working.
I have several pypy's floating around here, each within its own
virtualenv. If you aren't familiar with virtualenv, read all
about it here:
On Mon, Feb 23, 2015 at 8:25 AM, Marko Rauhamaa wrote:
> This is a true statement:
>
>If X is Y, then id(X) == id(Y).
>
> However, this is generally not a true statement:
>
>If X is Y, then id(X) is id(Y).
Irrelevant, because the identities of equal integers didn't come into this.
ChrisA
Cem Karan :
> My goal is to make things as pythonic (whatever that means in this
> case) and obvious as possible. Ideally, a novice can more or less
> guess what will happen with my API without really having to read the
> documentation on it.
If you try to shield your user from the complexities o
LJ :
id(b[0])
> 4582
[...]
id(b[2])
> 4582
>
> Please correct me if I am wrong, but according to this b[2] and b[0]
> are the same object. Now,
>
b[0] is b[2]
> False
This is a true statement:
If X is Y, then id(X) == id(Y).
However, this is generally not a true statem
pfranke...@gmail.com:
> I have some functions which are reading values from hardware. If one
> of the values changes, I want a corresponding notification to the
> connected clients. The network part shouldn't be the problem. Here is
> what I got so far:
>
> @asyncio.coroutine
> def check():
> ol
On Feb 22, 2015, at 4:02 PM, Ethan Furman wrote:
> On 02/22/2015 05:13 AM, Cem Karan wrote:
>
>> Output:
>> From Evil Zombie: Surprise!
>> From Your Significant Other: Surprise!
>>
>> In this case, the user made an error (just as Marko said in his earlier
>> message),
>> and forgot about the
On 02/22/2015 05:13 AM, Cem Karan wrote:
> Output:
> From Evil Zombie: Surprise!
> From Your Significant Other: Surprise!
>
> In this case, the user made an error (just as Marko said in his earlier
> message),
> and forgot about the callback he registered with the library. The callback
> isn't
Laura Creighton writes:
> The GIL isn't going away from PyPy any time real soon, alas.
I thought the GIL's main purpose was to avoid having to lock all the
CPython refcount updates, so if PyPy has tracing GC, why is there still
a GIL? And how is TM going to help with parallelism if the GIL is st
Ooops, I missed the numpy, so I thought that it was the contents
of the array that was causing the problem. My very bad. Apologies.
Laura
--
https://mail.python.org/mailman/listinfo/python-list
In a message of Sun, 22 Feb 2015 11:02:29 -0800, Paul Rubin writes:
>Laura Creighton writes:
>> Because one thing we do know is that people who are completely and
>> utterly ignorant about whether having multiple cores will improve
>> their code still want to use a language that lets them use the
On Sun, Feb 22, 2015 at 12:41 PM, Mario Figueiredo wrote:
> The sqlite context manager doesn't close a database connection on
> exit. It only ensures, commits and rollbacks are performed.
Sorry, I haven't paid careful attention to this thread, so perhaps
this has already been suggested, however..
Dave Farrance wrote:
>Steven D'Aprano wrote:
>
>>I assume you're talking about drawing graphics rather than writing text. Can
>>you tell us which specific library or libraries won't run under PyPy?
>
>Yes, mainly the graphics. I'm a hardware engineer, not a software
>engineer, so I might well b
On 02/22/2015 09:53 AM, LJ wrote:
Hi everyone. Quick question here. Lets suppose if have the following numpy
array:
b=np.array([[0]*2]*3)
and then:
id(b[0])
4582
id(b[1])
45857512
id(b[2])
4582
Please correct me if I am wrong, but according to this b[2] and b[0] are the
same o
On Mon, Feb 23, 2015 at 5:13 AM, Laura Creighton wrote:
> In a message of Sun, 22 Feb 2015 09:53:33 -0800, LJ writes:
>>Hi everyone. Quick question here. Lets suppose if have the following numpy
>>array:
>>
>>b=np.array([[0]*2]*3)
>>
>>and then:
>>
> id(b[0])
>>4582
> id(b[1])
>>45857
On 2015-02-22 20:29, Jacob Kruger wrote:
> jaws, doesn't always cooperate perfectly with command line/console
> interface
I've heard that on multiple occasions. Since I mostly work with
Linux, the only terminal-with-screen-reader hints I've heard involve
using TeraTerm as the SSH client with NVDA
On 22/02/2015 18:41, Mario Figueiredo wrote:
On Sat, 21 Feb 2015 12:22:58 +, Mark Lawrence
wrote:
Use your context manager at the outer level.
import sqlite3 as lite
try:
with lite.connect('data.db') as db:
try:
db.execute(sql, parms)
except lite.IntegrityError:
Laura Creighton writes:
> Because one thing we do know is that people who are completely and
> utterly ignorant about whether having multiple cores will improve
> their code still want to use a language that lets them use the
> multiple processors. If the TM dream of having that just happen,
> se
On Sat, 21 Feb 2015 12:22:58 +, Mark Lawrence
wrote:
>
>Use your context manager at the outer level.
>
>import sqlite3 as lite
>
>try:
> with lite.connect('data.db') as db:
> try:
> db.execute(sql, parms)
> except lite.IntegrityError:
> raise ValueError('invalid da
- Original Message -
From: "Tim Chase"
Subject: Re: Accessible tools
While my experience has shown most of your items to be true, I'd
contend that
• Do not, have access to debugging tools.
is mistaken or at least misinformed. For Python, I use the "pdb"
module all the time, and
On Sunday, February 22, 2015 at 2:42:48 PM UTC+5:30, Laura Creighton wrote:
> In a message of Sat, 21 Feb 2015 22:07:30 -0800, write
> >Dear Sir,
> >
> >Thank you for your kind suggestion. Let me traverse one by one.
> >My special feature is generally Semantic Search, but I am trying to build
> >
In a message of Sun, 22 Feb 2015 09:53:33 -0800, LJ writes:
>Hi everyone. Quick question here. Lets suppose if have the following numpy
>array:
>
>b=np.array([[0]*2]*3)
>
>and then:
>
id(b[0])
>4582
id(b[1])
>45857512
id(b[2])
>4582
>
>Please correct me if I am wrong, but ac
Hi everyone. Quick question here. Lets suppose if have the following numpy
array:
b=np.array([[0]*2]*3)
and then:
>>> id(b[0])
4582
>>> id(b[1])
45857512
>>> id(b[2])
4582
Please correct me if I am wrong, but according to this b[2] and b[0] are the
same object. Now,
>>> b[0] is b[2]
Hello!
I am just trying to get familiar with asyncio. It seems to be a good thing,
however, I am still having troubles and feel pretty puzzled although I think I
got the point what async IO means. This is the problem I am trying to
accomplish:
I have some functions which are reading values fro
In a message of Sun, 22 Feb 2015 15:36:42 +, Dave Farrance writes:
>Laura Creighton wrote:
>
>>I don't understand 'an interpreter rather than a JIT'. PyPy has a
>>JIT, that sort of is the whole point.
>
>Yes. I meant that from my end-user, non-software-engineer perspective, it
>looked as tho
On 21/02/15 19:46, TommyVee wrote:
> Start off with sets of elements as follows:
>
> 1. A,B,E,F
> 2. G,H,L,P,Q
> 3. C,D,E,F
> 4. E,X,Z
> 5. L,M,R
> 6. O,M,Y
>
> Note that sets 1, 3 and 4 all have the element 'E' in common, therefore
> they are "related" and form the following superset:
>
> A,B,C
On Sat, 21 Feb 2015 14:46:26 -0500, TommyVee wrote:
> Start off with sets of elements as follows:
>
> 1. A,B,E,F
> 2. G,H,L,P,Q
> 3. C,D,E,F
> 4. E,X,Z
> 5. L,M,R
> 6. O,M,Y
>
> Note that sets 1, 3 and 4 all have the element 'E' in common, therefore they
> are "related" and form the following supe
Steven D'Aprano wrote:
>I assume you're talking about drawing graphics rather than writing text. Can
>you tell us which specific library or libraries won't run under PyPy?
Yes, mainly the graphics. I'm a hardware engineer, not a software
engineer, so I might well be misunderstanding PyPy's curr
Laura Creighton wrote:
>I don't understand 'an interpreter rather than a JIT'. PyPy has a
>JIT, that sort of is the whole point.
Yes. I meant that from my end-user, non-software-engineer perspective, it
looked as though CPython was proceeding with leaps and bounds and that
PyPy remained mostly
jkn wrote:
> I'm curious what ...behavioural... models you are creating quickly in
> Python that then need rewriting in C for speed. SPICE? some other CAD?
> Might be interesting to learn more about what and how you are actually
> doing.
The convert-to-C cases were complex filtering functions.
Skip Montanaro wrote:
> On Thu, Feb 19, 2015 at 10:27 AM, Phillip Fleming
> wrote:
>> In my opinion, Python will not take off like C/C++ if there is no ANSI
>> standard.
>
> On one side of your statement, what makes you think Python ever wanted
> to "take off like C/C++"? On the other side, ther
On 2015-02-19 22:55, Jason Friedman wrote:
> > If you're going to call listdir, you probably want to use fnmatch
> > directly.
> >
> > fnmatch seems to be silent on non-existent directories:
> python -c 'import fnmatch; fnmatch.fnmatch("/no/such/path", "*")'
a better test would be glob.glob as f
On Feb 22, 2015, at 5:15 AM, Gregory Ewing wrote:
> Frank Millman wrote:
>> "In order to inform users that certain bits of state have changed, I require
>> them to register a callback with my code."
>> This sounds to me like a pub/sub scenario. When a 'listener' object comes
>> into existence
On Feb 22, 2015, at 7:46 AM, Marko Rauhamaa wrote:
> Cem Karan :
>
>> On Feb 21, 2015, at 12:08 PM, Marko Rauhamaa wrote:
>>> Maybe the logic of the receiving object isn't prepared for the callback
>>> anymore after an intervening event.
>>>
>>> The problem then, of course, is in the logic an
On 19/02/2015 16:27, Phillip Fleming wrote:
In my opinion, Python will not take off like C/C++ if there is no ANSI
standard.
Python has already taken off because it doesn't have a standard as such.
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our
On Feb 22, 2015, at 7:52 AM, Laura Creighton wrote:
> In a message of Sun, 22 Feb 2015 07:16:14 -0500, Cem Karan writes:
>
>> This was PRECISELY the situation I was thinking about. My hope was
>> to make the callback mechanism slightly less surprising by allowing
>> the user to track them, rel
Dave Farrance wrote:
> As an engineer, I can quickly knock together behavioural models of
> electronic circuits, complete units, and control systems in Python, then
> annoyingly in a few recent cases, have to re-write in C for speed.
>
> I've tried PyPy, the just-in-time compiler for Python, and
Steven D'Aprano :
> I don't know about Java's Hotspot, but I do know that CPython's ref counting
> garbage collector has at least one advantage over the GC used by Jython and
> IronPython: unlike them, open files are closed as soon as they are no
> longer in use.
You can't depend on that kind of
On Mon, Feb 23, 2015 at 12:45 AM, Steven D'Aprano
wrote:
>> No no no. It's the other way around. _Something_ has to be doing those
>> callbacks, and it's that _something_ that should be keeping them
>> alive. The fact that it's a registered callback should itself *be* a
>> reference (and not a wea
Marko Rauhamaa wrote:
> Chris Angelico :
>
>> On Sun, Feb 22, 2015 at 7:34 PM, Marko Rauhamaa wrote:
>>> Refloops are not to be worried about, let alone removed.
>>
>> Why?
>
> Because the whole point of GC-languages is that you should stop worrying
> about memory. Trying to mastermind and micr
Cem Karan :
> You were saying that you move your objects into a zombie state. I
> assumed that you meant you marked them in some manner (e.g., setting
> 'is_zombie' to True),
Yes, but even better:
self.set_state(ZOMBIE)
> so that anything that has a strong reference to the object knows th
On Feb 22, 2015, at 7:24 AM, Chris Angelico wrote:
> On Sun, Feb 22, 2015 at 11:07 PM, Cem Karan wrote:
>>> Correct. The GUI engine ultimately owns everything. Of course, this is
>>> a very simple case (imagine a little notification popup; you don't
>>> care about it, you don't need to know whe
Chris Angelico wrote:
> On Sun, Feb 22, 2015 at 9:32 PM, Steven D'Aprano
> wrote:
>> Why? Do you expect that the Python garbage collector special cases
>> callbacks to keep them alive even when there are no references to them?
>> How would it distinguish a callback from some other function?
>
>
On Feb 22, 2015, at 7:12 AM, Marko Rauhamaa wrote:
> Cem Karan :
>
>> On Feb 21, 2015, at 11:03 AM, Marko Rauhamaa wrote:
>>> I use callbacks all the time but haven't had any problems with strong
>>> references.
>>>
>>> I am careful to move my objects to a zombie state after they're done so
>
In a message of Sun, 22 Feb 2015 12:45:03 +, Dave Farrance writes:
>Maybe there's not enough people like me that have really felt the need for
>the speed. Or maybe it's simply the accident of the historical
>development path that's set-in-stone an interpreter rather than a JIT.
>Anybody got a
On Feb 21, 2015, at 3:57 PM, Grant Edwards wrote:
> On 2015-02-21, Cem Karan wrote:
>>
>> On Feb 21, 2015, at 12:42 AM, Chris Angelico wrote:
>>
>>> On Sat, Feb 21, 2015 at 1:44 PM, Cem Karan wrote:
In order to inform users that certain bits of state have changed, I
require them
On Feb 21, 2015, at 12:27 PM, Steven D'Aprano
wrote:
> Cem Karan wrote:
>
>>
>> On Feb 21, 2015, at 8:15 AM, Chris Angelico wrote:
>>
>>> On Sun, Feb 22, 2015 at 12:13 AM, Cem Karan wrote:
OK, so it would violate the principle of least surprise for you.
Interesting. Is this a g
On Thu, Feb 19, 2015 at 10:27 AM, Phillip Fleming wrote:
> In my opinion, Python will not take off like C/C++ if there is no ANSI
> standard.
On one side of your statement, what makes you think Python ever wanted
to "take off like C/C++"? On the other side, there are other languages
(Java, PHP, P
On Sunday, 22 February 2015 12:45:15 UTC, Dave Farrance wrote:
> As an engineer, I can quickly knock together behavioural models of
> electronic circuits, complete units, and control systems in Python, then
> annoyingly in a few recent cases, have to re-write in C for speed.
>
> I've tried PyPy,
In a message of Sun, 22 Feb 2015 07:16:14 -0500, Cem Karan writes:
>This was PRECISELY the situation I was thinking about. My hope was
>to make the callback mechanism slightly less surprising by allowing
>the user to track them, releasing them when they aren't needed
>without having to figure out
Cem Karan :
> On Feb 21, 2015, at 12:08 PM, Marko Rauhamaa wrote:
>> Maybe the logic of the receiving object isn't prepared for the callback
>> anymore after an intervening event.
>>
>> The problem then, of course, is in the logic and not in the callbacks.
>
> This was PRECISELY the situation I
As an engineer, I can quickly knock together behavioural models of
electronic circuits, complete units, and control systems in Python, then
annoyingly in a few recent cases, have to re-write in C for speed.
I've tried PyPy, the just-in-time compiler for Python, and that is
impressively, hugely fa
On Sun, Feb 22, 2015 at 11:07 PM, Cem Karan wrote:
>> Correct. The GUI engine ultimately owns everything. Of course, this is
>> a very simple case (imagine a little notification popup; you don't
>> care about it, you don't need to know when it's been closed, the only
>> event on it is "hit Close t
On Feb 21, 2015, at 12:08 PM, Marko Rauhamaa wrote:
> Steven D'Aprano :
>
>> Other than that, I cannot see how calling a function which has *not*
>> yet been garbage collected can fail, just because the only reference
>> still existing is a weak reference.
>
> Maybe the logic of the receiving
Cem Karan :
> On Feb 21, 2015, at 11:03 AM, Marko Rauhamaa wrote:
>> I use callbacks all the time but haven't had any problems with strong
>> references.
>>
>> I am careful to move my objects to a zombie state after they're done so
>> they can absorb any potential loose callbacks that are linger
On Feb 21, 2015, at 11:03 AM, Marko Rauhamaa wrote:
> Chris Angelico :
>
>> On Sat, Feb 21, 2015 at 1:44 PM, Cem Karan wrote:
>
>>> In order to inform users that certain bits of state have changed, I
>>> require them to register a callback with my code. The problem is that
>>> when I store th
On Feb 21, 2015, at 10:55 AM, Chris Angelico wrote:
> On Sun, Feb 22, 2015 at 2:45 AM, Cem Karan wrote:
>> OK, so if I'm reading your code correctly, you're breaking the cycle in your
>> object graph by making the GUI the owner of the callback, correct? No other
>> chunk of code has a refere
On 22.02.2015 00:20, alb wrote:
I finally upgraded! And I'm currently trying out xfce!
Thanks again for the suggestions.
Al
p.s.: now pandoc works as expected.
I don't want to sound insistent, but as a Linux user I personnaly
recommend not to use "apt" to install and use python packages. Ins
somebody, I got confused with the indent level wrote:
>> They force the use of the much slower cycle-detecting GC, rather than
>> the quick and efficient CPython refcounter.
Somebody has misunderstood something here. When it comes to efficient
garbage collectors, refcounting is a turtle. The CP
On Sun, Feb 22, 2015 at 9:32 PM, Steven D'Aprano
wrote:
> Why? Do you expect that the Python garbage collector special cases callbacks
> to keep them alive even when there are no references to them? How would it
> distinguish a callback from some other function?
No no no. It's the other way aroun
Hi,
I'm a Computer Science undergraduate student who like to participate in
GSOC this year.
Do you have any projects willing to publish for gsoc 2015.
I am more familiar with Python.
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> If you're going to call listdir, you probably want to use fnmatch directly.
>
> fnmatch seems to be silent on non-existent directories:
python -c 'import fnmatch; fnmatch.fnmatch("/no/such/path", "*")'
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