🌐 Mailman 3 March 2010 - Python-list - python.org

timeout restart in pexpect
by Pankaj March 3, 2010

March 3, 2010

I am using pexpect to automate some procedures. My procedures are time cosuming, some messages coming out from that, in failure cases it will not output anything. So I would like to give small timeout value but when some message is received, it should restart the timeout, similar like "restart_timeout_upon_receive" in perl. Is it possible in Python using pexpect ?

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посмотреть порно фильм про кунилингус
by EVZYN March 3, 2010

March 3, 2010

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Need bluez/python ( PyBluez) method to access BlueZ data- Please Help!
by Isaac March 3, 2010

March 3, 2010

Hi, I need to access data that is handled and stored in the BlueZ file system, but is, unfortunately, not available via the current BlueZ D-Bus API. That is, the data I need is parsed by BlueZ, but not provided in the current D-Bus signal. I need a method or interface that does not rely on the D-Bus API and can directly access the BlueZ file system to get this parsed data. Can PyBlueZ do this? If not, any suggestions would be immensely appreciated. Thanks! Isaac

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Re: Draft PEP on RSON configuration file format
by Patrick Maupin March 3, 2010

March 3, 2010

On Mar 2, 11:59 am, Terry Reedy <tjre...(a)udel.edu> wrote: > To me, comparing object notation with programming language is not > helpful to the OP's purpose. Yes, I agree, it was a distraction. I fell into the trap of responding to the ludicrous claim that "if X is a superset of Y, then X cannot possibly look better than Y" (a claim made by multiple people all thinking it was clever) by showing that Y has other supersets that do in fact look better than Y. In doing this, I made the mistake of choosing a superset of an analogue to Y, rather than to Y itself. When called out on it, I showed that, in fact, the actual X that IS a superset of Y can be used in a way that looks better. However, you are right that JSON is such a small subset of JS that it's really pretty ridiculous to even compare them, but that still makes the point that the original argument I was trying to refute is completely specious. In retrospect, though, I should have chosen a better way to make that point, because I let myself get caught up in making and then defending a flippant statement that I don't really care about one way or the other. > His main claim is that JSON can be usefully > extended but that YAML is too much, so that perhaps he, with help, can > find a 'sweet spot' in between. An excellent summary of my position. Thanks, Pat

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How to use python to register a service (an existing .exe file)
by News123 March 3, 2010

March 3, 2010

Hi, Is there a python way to register new windows services. I am aware of the instsrv.exe program, which can be used to install services. I could use subprocess.Popen to call instsrv.exe "service_name" program.exe but wondered, whether there's already an existing function. Thans in advance and bye N

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Python 2.6.5 release candidate 1 now available
by Barry Warsaw March 3, 2010

March 3, 2010

Hello everyone, The source tarballs and Windows installer for Python 2.6.5 release candidate 1 are now available: http://www.python.org/download/releases/2.6.5/ Please download them, install them, and try to use them with your favorite projects and environments. If no regressions are found, we will do the final release on Monday March 15, 2010. Please test the release candidate as much as possible in the meantime, and help make 2.6.5 a rock solid release! Thanks, -Barry P.S. The Mac installer will hopefully be available soon.

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Xgyxkcxxpy
by ftp-wg-owner＠hethmon.com March 3, 2010

March 3, 2010

Dear user of python.org, We have received reports that your e-mail account was used to send a large amount of spam during this week. Most likely your computer was compromised and now contains a trojaned proxy server. We recommend you to follow instruction in order to keep your computer safe. Best wishes, python.org technical support team.

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Challenge: escape from the pysandbox
by Victor Stinner March 3, 2010

March 3, 2010

Hi, pysandbox is a new Python sandbox project under development. By default, untrusted code executed in the sandbox cannot modify the environment (write a file, use print or import a module). But you can configure the sandbox to choose exactly which features are allowed or not, eg. import sys module and read the file /etc/issue. I think that the project reached the "testable" stage. I launch a new challenge: try to escape from the sandbox. I'm unable to write strict rules. The goal is to access objects outside the sandbox. Eg. write into a file, import a module which is not in the whitelist, modify an object outside the sandbox, etc. To test the sandbox, you have 3 choices: - interpreter.py: interactive interpreter executed in the sandbox, use: --verbose to display the whole sandbox configuration, --features=help to enable help() function, --features=regex to enable regex, --help to display the help. - execfile.py <your_script.py>: execute your script in the sandbox. It has also --features option: use --features=stdout to be able to use the print instruction :-) - use directly the Sandbox class: use methods call(), execute() or createCallback() Don't use "with sandbox: ..." because there is known but with local frame variables. I think that I will later drop this syntax because of this bug. Except of debug_sandbox, I consider that all features are safe and so you can enable all features :-) There is no prize, it's just for fun! But I will add the name of hackers founding the best exploits. pysandbox is not ready for production, it's under heavy development. Anyway I *hope* that you will quickly find bugs! -- Use tests.py to found some examples of how you can escape a sandbox. pysandbox is protected against all methods described in tests.py ;-) See the README file to get more information about how pysandbox is implemented and get a list of other Python sandboxes. pysandbox is currently specific to CPython, and it uses some ugly hacks to patch CPython in memory. In the worst case it will crash the pysandbox Python process, that's all. I tested it under Linux with Python 2.5 and 2.6. The portage to Python3 is not done yet (is someone motivated to write a patch? :-)). -- Victor Stinner http://www.haypocalc.com/

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Re: Challenge: escape from the pysandbox
by aahz＠pythoncraft.com March 3, 2010

March 3, 2010

In article <mailman.330.1267292249.4577.python-list(a)python.org>, Daniel Fetchinson <fetchinson(a)googlemail.com> wrote: > >I guess they also have some kind of a sandbox if they let people run >python on their machines, I'm not sure if it's open source though. Thing is, I'm sure that Google uses a critical backstop to any Python-based sandbox: something like a chroot jail. The Python sandbox is mostly there to inform you about what you can and can't do; the real security is provided by the OS. -- Aahz (aahz(a)pythoncraft.com) <*> http://www.pythoncraft.com/ "Many customs in this life persist because they ease friction and promote productivity as a result of universal agreement, and whether they are precisely the optimal choices is much less important." --Henry Spencer

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Multiprocessing.Pipe is not concurrently bi-directional (design flaw?)
by Metalone March 3, 2010

March 3, 2010

I wanted to use Multiprocessing.Pipe and Multiprocessing.Process to peform Actor style communication. However, I just can't get what I need done, and I think it is due to inherit problems with the design of Pipe. If I have a process like this def process1(conn): while True: msg = conn.recv() if msg == 'go': res = go() # this is a long running function conn.send(res) # send result back to caller elif msg == 'stop': stop() # this is intended to stop the go() function, for example using deciding to abort operation. In this code the 'stop' message cannot be received, because the code is in the long running go() function. So lets change it. def process1(conn): while True: msg = conn.recv() if msg == 'go': t = threading.Thread(target=go, args=(conn,)) t.start() elif msg == 'stop': stop() # this is intended to stop the go() function. Now the thread-1 is waiting on the blocking recv(). If the go() function completes on thread-2, it wants to send its result via the connection object, but it can't because the connection is in use. Trying to work around this gets complicated. For example, using a second process and a second connection object to read the 'stop' message, and then changing a shared memory flag to stop the go() function. Pipes not being concurrently bi-directional appears to be a design flaw to me. pyCSP appears to be an interesting approach, but it does not support communication across O.S. processes on Win32.

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