On Sun, Oct 16, 2011 at 3:44 PM, <tutor-requ...@python.org> wrote:
> Send Tutor mailing list submissions to
> tutor@python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mail.python.org/mailman/listinfo/tutor
> or, via email, send a message with subject or body 'help' to
> tutor-requ...@python.org
>
> You can reach the person managing the list at
> tutor-ow...@python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Tutor digest..."
>
>
> Today's Topics:
>
> 1. Re: Bounded Linear Search (tog...@users.sourceforge.net)
> 2. Re: Can I set LD_LIBRARY_PATH within a .py file?
> (Albert-Jan Roskam)
> 3. Re: Socket and Ports (Jacob Bender)
> 4. 6 random numbers (ADRIAN KELLY)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 16 Oct 2011 19:04:41 +0200
> From: tog...@users.sourceforge.net
> To: tutor@python.org
> Subject: Re: [Tutor] Bounded Linear Search
> Message-ID: <j7f2ra$7dp$1...@dough.gmane.org>
> Content-Type: text/plain; charset="ISO-8859-1"
>
> Peter Otten wrote:
>
> > To verify that the algorithm is correct now you could walk through
> > increasingly more complex sample data, which may be possible in this
> case,
> > but rarely ever for an entire script. Instead the common approach is to
> > pick a few samples along with the expected outcomes, feed them to your
> > function and verify that they give the expected output
> >
> > def unique_values(items):
> > ...
> > return uniq
> >
> > assert unique_values([42, 42]) == [42]
> > assert unique_values([1, 2, 3, 2]) == [1, 2, 3]
>
> Thanks for the tip and where I was failing to see
>
> Togan
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 16 Oct 2011 11:25:44 -0700 (PDT)
> From: Albert-Jan Roskam <fo...@yahoo.com>
> To: Hugo Arts <hugo.yo...@gmail.com>
> Cc: Python Mailing List <tutor@python.org>
> Subject: Re: [Tutor] Can I set LD_LIBRARY_PATH within a .py file?
> Message-ID:
> <1318789544.84883.yahoomail...@web110709.mail.gq1.yahoo.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Hugo,
> ?
> You are absolutely right. Thank you! It took me a lot of reading and
> tinkering to find out that typing the following in the terminal works:
> export LD_LIBRARY_PATH=\path\to\the\lib
> python main.py # contains import to my program + calls to the functions in
> it.
> ?
> I find it strange though, that ctypes.CDLL() does not accept library names
> *with the full path*. In Linux, you could do it, but it seems that all the
> dependencies of the libary in that non-standard location are looked for ONLY
> in that non-standard location.
>
> Cheers!!
> Albert-Jan
>
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> All right, but apart from the sanitation, the medicine, education, wine,
> public order, irrigation, roads, a fresh water system, and public health,
> what have the Romans ever done for us?
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> From: Hugo Arts <hugo.yo...@gmail.com>
> >To: Albert-Jan Roskam <fo...@yahoo.com>
> >Cc: Python Mailing List <tutor@python.org>
> >Sent: Sunday, October 16, 2011 1:22 AM
> >Subject: Re: [Tutor] Can I set LD_LIBRARY_PATH within a .py file?
> >
> >On Sat, Oct 15, 2011 at 9:51 PM, Albert-Jan Roskam <fo...@yahoo.com>
> wrote:
> >> Hello,
> >> Can I set the LD_LIBRARY_PATH environment variable (on-the-fly) within a
> .py
> >> file?
> >> I would like to use an .so-file that lives in a non-standard location.
> >>
> >> This does not work:
> >> try:
> >> ?? os.environ["LD_LIBRARY_PATH"]? += (":" + path)
> >> except KeyError:
> >> ?? os.environ["LD_LIBRARY_PATH"] = path
> >> Currently, I can only run the program in the terminal:
> >> export LD_LIBRARY_PATH=/home/dude/Desktop/test
> >> python /home/dude/Desktop/testLoadLibLinux.py
> >> This works (yaaayy!), but I'd like to run the .py file directly.
> >> Is this possible? I also don't? like the fact that I can't test the .py
> file
> >> in Idle.
> >> Perhaps a complicating factor is a bug in LD_LIBRARY_PATH
> >> in Linux Ubuntu 10 (the version I'm using):
> >> https://bugs.edge.launchpad.net/ubuntu/+source/xorg/+bug/366728
> >> https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/366728/comments/21
> >> solution:
> >> sudo gedit /etc/X11/Xsession.options
> >> (change "use-ssh-agent" into "no-use-ssh-agent")
> >>
> >> Thank you in advance for your thoughts!
> >>
> >> Cheers!!
> >> Albert-Jan
> >>
> >
> >Alright, I'm not going to pretend to be an expert on this one, a bit
> >of this is speculation and inference from what I know about dynamic
> >linking. In short, I don't think you can modify LD_LIBRARY_PATH on the
> >fly and have it actually work. The reason for this is that the linker
> >runs and finds all the libraries *before* the python process actually
> >starts. So by the time you go and modify the environment, all
> >libraries have already been linked, and your modified variable is
> >never even read by the linker.
> >
> >So the best you can do is write a tiny wrapper to set LD_LIBRARY_PATH
> >and then run your actual script through it. Or you could set the
> >environment variable and then fork(), I suppose, since the child will
> >inherit the modified environment. But the wrapper is your simplest
> >option.
> >
> >HTH,
> >Hugo
> >
> >
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <
> http://mail.python.org/pipermail/tutor/attachments/20111016/792dc422/attachment-0001.html
> >
>
> ------------------------------
>
> Message: 3
> Date: Sun, 16 Oct 2011 15:00:04 -0400
> From: Jacob Bender <benderjaco...@gmail.com>
> To: Hugo Arts <hugo.yo...@gmail.com>
> Cc: Python Tutor <tutor@python.org>, bob gailer <bgai...@gmail.com>
> Subject: Re: [Tutor] Socket and Ports
> Message-ID:
> <cacub+d0y_juphufxgnd9qtgystzcjegt73yuxwtslchykly...@mail.gmail.com
> >
> Content-Type: text/plain; charset="iso-8859-1"
>
> Thank you, and I'm not planning on executing any data I receive from
> anybody. So I should be pretty safe...
>
> On Sun, Oct 16, 2011 at 10:48 AM, Hugo Arts <hugo.yo...@gmail.com> wrote:
>
> > On Sun, Oct 16, 2011 at 4:20 PM, bob gailer <bgai...@gmail.com> wrote:
> > > On 10/16/2011 8:28 AM, Jacob Bender wrote:
> > >>
> > >> Dear Tutors,
> > >>
> > >> I've been having an issue with socket. I wanted to use it for
> > >> transmitting strings over the Internet.
> > >
> > > That's good, because strings is all you can transmit.
> > >
> > >> The problem is that my friend insists that allowing python to transmit
> > and
> > >> receive information via an Internet port is a bad idea. He claimed
> that
> > I
> > >> could(and probably would) receive information that wouldn't
> necessarily
> > do
> > >> my computer any good(in a nutshell).
> > >
> > > I am not the expert on this issue. My view:
> > >
> > > once you establish a socket connection then you wait to receive data.
> All
> > > the socket software (Python or other) does is receive a string. What
> you
> > do
> > > with it is up to you. If you apply eval or exec to it than anything
> could
> > > happen. No one can IMHO cause any action via socket.
> > >
> >
> > vulnerabilities in the lower level stack notwithstanding, of course.
> > But in essence, using sockets in python is not any more dangerous than
> > using sockets in any other language. You have to watch what you're
> > doing and be careful with the data you receive, but as long as you do
> > that you shouldn't be in any danger.
> >
> > Hugo
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <
> http://mail.python.org/pipermail/tutor/attachments/20111016/a2d911bb/attachment-0001.html
> >
>
> ------------------------------
>
> >Message: 4
> >Date: Sun, 16 Oct 2011 19:43:06 +0000
> >From: ADRIAN KELLY <kellyadr...@hotmail.com>
> >To: <tutor@python.org>
> >Subject: [Tutor] 6 random numbers
> >Message-ID: <dub103-w54ebdc0822317f0df7e1bfa9...@phx.gbl>
> >Content-Type: text/plain; charset="iso-8859-1"
> >
> >
> >hello all,
> >anyone know how i would go about printing 6 random numbers, i know i could
> copy and paste 6 times (which would work) but i was >thinking about a while
> loop, ie. while lottery_numbers.count is <7.
> >Is it possible to code this? is it possible to count random variables? i
> am trying to keep the program as simple as possible, cheers
> >
> >any help would be welcome,
> >
> >import random
> >lottery_numbers=random.randrange(1,42)
> >print lottery_numbers
>
In fact it is. I notice, however, that you include 2 arguments in the
randrange method, which only takes 1 argument. To do this, this code should
work:
times = 1
while times < 7:
import random
lottery_numbers=random.randrange(1, 42)
print lottery_numbers
times+=1
>
>
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <
> http://mail.python.org/pipermail/tutor/attachments/20111016/4c9e4d5c/attachment.html
> >
>
> ------------------------------
>
> _______________________________________________
> Tutor maillist - Tutor@python.org
> http://mail.python.org/mailman/listinfo/tutor
>
>
> End of Tutor Digest, Vol 92, Issue 77
> *************************************
>
_______________________________________________
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
