Chris Angelico wrote:
> Sure, and that's all well and good. But what I just cited there *is* a
> shipping product. That's a live server that runs a game that I'm admin
> of. So it's possible to do without the resource safety net of periodic
> restarts.
Nice that the non-Python server you administe
dieter wrote:
> As you see from the description, memory compaction presents a heavy burden
> for all extension writers.
Particularly because many CPython extensions are actually interfaces to
pre-existing libraries. To leverage the system's facilities CPython has to
follow the system's conventio
Chris Angelico wrote:
> This is why a lot of long-duration processes are built to be restarted
> periodically. It's not strictly necessary, but it can be the most
> effective way of solving a problem. I tend to ignore that, though, and
> let my processes just keep on running... for 88 wk 4d 23:56:2
b.kris...@gmail.com wrote:
> I got a chance to build an university website, within very short period of
> time.
> I know web2py, little bit of Django, so please suggest me the best to build
> rapidly.
Web2py rocks like nothing else for getting up fast. If you already know it,
problem solved.
Chris Angelico wrote:
> Bas wrote:
> > Still trying to figure out your algorithm ...
>
> It's pretty simple. (That's a bad start, I know!) Like the Sieve of
> Eratosthenes, it locates prime numbers, then deems every multiple of
> them to be composite. Unlike the classic sieve, it does the "deem"
>
MrsEntity wrote:
> Based on heapy, a db based solution would be serious overkill.
I've embraced overkill and my life is better for it. Don't confuse overkill
with cost. Overkill is your friend.
The facts of the case: You need to save some derived strings for each of 2M
input lines. Even half th
I wrote:
> And here's a thread example, based on Benjamin's code:
[...]
Doh! Race condition. Make that:
import subprocess
import thread
import Queue
def readtoq(pipe, q):
q.put(pipe.read())
cat = subprocess.Popen('cat', shell=True, stdin=subprocess.PIPE,
stdout=subpr
Floris Bruynooghe wrote:
> Benjamin Watine wrote:
> > Could you give me more information / examples about the two solutions
> > you've proposed (thread or asynchronous I/O) ?
>
> The source code of the subprocess module shows how to do it with
> select IIRC. Look at the implementation of the commu
Marko Rauhamaa wrote:
> This tiny program hangs:
>
>
> #!/usr/bin/env python
> import subprocess
> a = subprocess.Popen('cat',shell = True,stdin = subprocess.PIPE,
> stdout = subprocess.PIPE)
> b = subproc
On Sep 17, 6:39 am, Laurent Pointal
> May use simple file in known place:
> $HOME/.myprefs
> $HOME/.conf/myprefs
>
> Or host specific configuration API:
> WindowsRegistry HKEY_CURRENT_USER\Software\MySociety\MyApp\myprefs
>
> See os.getenv, and _winreg Windows specific module.
> See also standard C
ohn Machin wrote:
> [EMAIL PROTECTED] wrote:
> > "For each nibble n of x" means to take each 4 bit piece of the BCD
> > integer as a value from zero to sixteen (though only 0 through 9
> > will appear), from most significant to least significant.
> The OP's input, unvaryingly through the whole thre
Sybren Stuvel wrote:
> John Salerno enlightened us with:
> > But of course I still agree with you that in either case it's not a
> > judgment you can fairly make 30 years after the fact.
>
> I don't see Microsoft changing it the next 30 years either... Apple
> moved from \r to \n as EOL character.
John Machin wrote:
> [EMAIL PROTECTED] wrote:
> > "For each nibble n of x" means to take each 4 bit piece of the BCD
> > integer as a value from zero to sixteen (though only 0 through 9
> > will appear), from most significant to least significant.
> The OP's input, unvaryingly through the whole t
John Machin wrote:
> [EMAIL PROTECTED] wrote:
>
> >My version assumes three subroutines: extracting
> > nibbles, shifting, and adding, Those are pretty simple, so I asked
> > if he needed them rather than presenting them.
> > Assuming we have
> > them, the algorithm is three lines long.
>
> Perhap
Guyon Morée wrote:
> i have a big list of tuples like this:
>
> [ (host, port, protocol, startime, endtime), .. ] etc
>
> now i have another big(ger) list of tuples like this:
>
> [(src_host, src_port, dest_src, dest_port, protocol, time), ... ] etc
>
> now i need to find all the items in the seco
John Machin wrote:
> [EMAIL PROTECTED] wrote:
> > John Machin wrote:
> > > [EMAIL PROTECTED] wrote:
> > > > To turn BCD x to binary integer y,
> > > >
> > > > set y to zero
> > > > for each nibble n of x:
> > > > y = (((y shifted left 2) + y) shifted left 1) + n
> > >
> > > Yeah yeah yeah
northband wrote:
> Hi, I am interested in re-writing my website in Python vs PHP but have
> a few questions. Here are my specs, please advise as to which
> configuration would be best:
>
> 1.Dell Poweredge Server, w/IIS, currently Windows but considering
> FreeBSD
> 2. Site consists of result page
John Machin wrote:
> [EMAIL PROTECTED] wrote:
> > Philippe Martin wrote:
> > > Yes, I came here for the "algorithm" question, not the code result.
> >
> > To turn BCD x to binary integer y,
> >
> > set y to zero
> > for each nibble n of x:
> > y = (((y shifted left 2) + y) shifted left 1)
Philippe Martin wrote:
> Yes, I came here for the "algorithm" question, not the code result.
To turn BCD x to binary integer y,
set y to zero
for each nibble n of x:
y = (((y shifted left 2) + y) shifted left 1) + n
Do you need instruction on extracting nibbles, and shifting and
adding
Philippe Martin wrote:
> Philippe Martin wrote:
> > You need to have you server in a separate thread.
> PS:
>
> http://wiki.wxpython.org/index.cgi/LongRunningTasks
And here's an important bit from the wxWindows doc:
For communication between secondary threads and the main thread,
you may us
[EMAIL PROTECTED] wrote:
> My server.py looks like this
>
> -CODE--
> #!/usr/bin/env python
> import socket
> import sys
> import os
>
> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> host = ''
> port = 2000
>
> s
sturlamolden wrote:
> A noteable exception is a toy OS from a manufacturer in Redmond,
> Washington. It does not do COW fork. It does not even fork.
>
> To make a server system scale well on Windows you need to use threads,
> not processes.
Here's one to think about: if you have a bunch of thread
Simon Forman wrote:
> alf wrote:
> > Hi,
> >
> > I have one thread app using SocketServer and use server_forever() as a
> > main loop. All works fine, but now I need certain timer checking let's
> > say every 1 second something and stopping the main loop. So questions are:
> > -how to stop ser
alf wrote:
> I have one thread app using SocketServer and use server_forever() as a
> main loop. All works fine, but now I need certain timer checking let's
> say every 1 second something and stopping the main loop. So questions are:
> -how to stop serve_forever
Override serve_forever() and
Paul Rubin wrote:
> Actually I don't understand the need for SSH.
Who are you and what have you done with the real Paul Rubin?
> This is traffic over a
> LAN, right? Is all of the LAN traffic encrypted? That's unusual; SSH
> is normally used to secure connections over the internet, but the
> l
mark wrote:
> The debate should not be about "threads vs processes", it should be
> about "threads vs events".
We are so lucky as to have both debates.
> Dr. John Ousterhout (creator of Tcl,
> Professor of Comp Sci at UC Berkeley, etc), started a famous debate
> about this 10 years ago with the f
Carl J. Van Arsdall wrote:
[...]
> I actually do use pickle (not for this, but for other things), could you
> elaborate on the safety issue?
>From http://docs.python.org/lib/node63.html :
Warning: The pickle module is not intended to be secure
against erroneous or maliciously constructed
Carl J. Van Arsdall wrote:
> Ah, alright, I think I understand, so threading works well for sharing
> python objects. Would a scenario for this be something like a a job
> queue (say Queue.Queue) for example. This is a situation in which each
> process/thread needs access to the Queue to get the
Carl J. Van Arsdall wrote:
> [EMAIL PROTECTED] wrote:
> > Carl J. Van Arsdall wrote:
> >
> >> [EMAIL PROTECTED] wrote:
> >>
> >>> Carl J. Van Arsdall wrote:
> >>>
> >>> I don't get what threading and Twisted would to do for
> >>> you. The problem you actually have is that you sometimes
> >>> need
Gerhard Fiedler wrote:
> Carl J. Van Arsdall wrote:
> > Well, I guess I'm thinking of an event driven mechanism, kinda like
> > setting up signal handlers. I don't necessarily know how it works under
> > the hood, but I don't poll for a signal. I setup a handler, when the
> > signal comes, if it
Carl J. Van Arsdall wrote:
> Alright, based a on discussion on this mailing list, I've started to
> wonder, why use threads vs processes.
In many cases, you don't have a choice. If your Python program
is to run other programs, the others get their own processes.
There's no threads option on that.
Paul Rubin wrote:
> Have you looked at POSH yet? http://poshmodule.sf.net
Paul, have you used POSH? Does it work well? Any major
gotchas?
I looked at the paper... well, not all 200+ pages, but I checked
how they handle a couple parts that I thought hard and they
seem to have good ideas. I didn
[EMAIL PROTECTED] wrote:
[...]
> def f1() :
> x=88
> f2()
> def f2() :
> print 'x=',x
> f1()
>
> that returns an error saying that "NameError: global name 'x' is not
> defined". I expected f2 to "see" the value of x defined in f1 since it
> is nested at runtime.
Ah, no, Python uses "s
Carl J. Van Arsdall wrote:
> [EMAIL PROTECTED] wrote:
> > Carl J. Van Arsdall wrote:
> >
> > I don't get what threading and Twisted would to do for
> > you. The problem you actually have is that you sometimes
> > need terminate these other process running other programs.
> > Use spawn, fork/exec*
Carl J. Van Arsdall wrote:
> Unfortunately this is due to the nature of the problem I am tasked with
> solving. I have a large computing farm, these os.system calls are often
> things like ssh that do work on locations remote from the initial python
> task. I suppose eventually I'll end up using
Dennis Lee Bieber wrote:
> On Mon, 24 Jul 2006 10:27:08 -0700, "Carl J. Van Arsdall"
> > My problem with the fact that python doesn't have some type of "thread
> > killer" is that again, the only solution involves some type of polling
> > loop. I.e. "if your thread of execution can be written so
Carl J. Van Arsdall wrote:
[...]
> My problem with the fact that python doesn't have some type of "thread
> killer" is that again, the only solution involves some type of polling
> loop.
A polliing loop is neither required nor helpful here.
[...]
> #Just pretend for the sake of arguement that 'o
Mark rainess wrote:
[...]
> It runs perfectly for about 4 hours, then freezes.
> I'm stuck. How do I debug this?
[...]
> Can anyone suggest techniques to help me learn what is going on.
By inspection: "errcode" is undefined; I expect you stripped the
example
a bit too far. If it is set to somethi
Hans wrote:
> Hi all,
>
> Is there a way that the program that created and started a thread also stops
> it.
> (My usage is a time-out).
>
> E.g.
>
> thread = threading.Thread(target=Loop.testLoop)
> thread.start() # This thread is expected to finish within a second
> thread.join(2)# Or ti
Boris Borcic wrote:
> does
>
> x.sort(cmp = lambda x,y : cmp(random.random(),0.5))
>
> pick a random shuffle of x with uniform distribution ?
>
> Intuitively, assuming list.sort() does a minimal number of comparisons to
> achieve the sort, I'd say the answer is yes.
You would be mistaken (except
Grant Edwards wrote:
> If the server has closed the connection, then a recv() on the
> socket will return an empty string "",
after returning all the data the remote side had sent, of course.
> and a send() on the
> socket will raise an exception.
Send() might, and in many cases should, raise a
I wrote:
> I prefer the tread solution. You can see my exmaple
> in message <[EMAIL PROTECTED]>.
>
>http://groups.google.com/group/comp.lang.python/msg/ffd0159eb52c1b49
[...]
> you should send the shutdown
> across, much like you copy data across: shutdown writing on the
> other socket.
Whic
BranoZ wrote:
> "132443" is a 'subsubstring' "0134314244133" because:
For the record, that's called a "subsequence".
http://www.google.com/search?hl=en&q=subsequence
--
--Bryan
--
http://mail.python.org/mailman/listinfo/python-list
Chris Curvey wrote:
> I need to ensure that there is only one instance of my python class on
> my machine at a given time. (Not within an interpreter -- that would
> just be a singleton -- but on the machine.) These instances are
> created and destroyed, but there can be only one at a time.
>
> S
Tom Anderson wrote:
> On Mon, 15 Aug 2005, Chris Curvey wrote:
>
> > Is there a better pattern to follow than using a __del__ method? I just
> > need to be absolutely, positively sure of two things:
>
> An old hack i've seen before is to create a server socket - ie, make a
> socket and bind it to
Damir Hakimov wrote:
> I found a strange bug in base64.encode and decode, when I try to encode
> - decode a file 1728512 bytes lenth.
> Is somebody meet with this? I don't attach the file because it big, but
> can send to private.
I agree the file is too big, but can you show a small
Python prog
Michael Hudson wrote:
> Bryan Olson writes:
> In some sense; it certainly does what I intended it to do.
[...]
> I'm not going to change the behaviour. The docs probably aren't
> especially clear, though.
The docs and the behavior contradict:
[...] these are the /start/ and /stop/ indices
Michael P. Soulier wrote:
> On 13/08/05 Bryan Olson said:
>
> > The seperate thread-or-process trick should work. Start a deamon
> > thread to do the gethostbyname, and have the main thread give up
> > on the check if the deamon thread doesn't report (via a lock or
> > another socket) within, say,
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