[Tutor] resetting the python interpreter through manipulating globals()
Hi, I have a program that talks to a python interpreter through pexpect (don't bother asking why ;). What I would like to do is occasionally reset the interpreter to the state it would be in if it had just been launched. I assumed I could simply clear out the globals() dictionary, minus '__builtins__' and some other important stuff, and recreate the globals. But even a simple attempt has failed quite badly: def reset_interpreter(): rThis method will reset a python interpreters globals dictionary with the one provided as the input parameter. # This will just try to delete all non important keys in globals for k in globals().keys(): print k if k == '__builtins__': continue else: try: del globals()[k] del locals()[k] except: continue print globals() This does not seem to work at all, any suggestions? Yi ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] hardware specs from python on OSX
Hi, I am trying to get some basic information about the computer's hardware specs in OSX in python. In linux I can get most of what I need from the /proc filesystem. Is there an equivalent in OSX? If not, where else can I get information about the system from? I need CPU model, # of cpus, cpu speed, physical memory, etc. Thanks, Yi ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] problem with unpickling an object
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi list, I am pickling a dictionary that has as one of it's values an object I create on the fly. When I try to unpickle that object, cPickle attempts to recreate that object but of course that module is not present anymore. How can I just make it skip over that particular key and just set the value to None? Thanks, - -- Yi Qiang ([EMAIL PROTECTED]) Web: http://www.yiqiang.net Tel: (206) 661-8469 PGP: 0xB515564B -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEg8k0tXlIMrUVVksRAt2tAJ4hq/3KmDo6BbS3p3AwhKf4Ga52DQCfXFtx GERJqs3IcLXuKaRcq/zuRUE= =SEZ6 -END PGP SIGNATURE- ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem with unpickling an object
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Kent Johnson wrote, On 06/05/2006 03:12 AM: From a quick read of the docs, it looks like you should set the unpickler's find_global attribute to a function you define. This function can first attempt to load the desired class (see pickle.find_class() for an example). If the load fails, then return a placeholder class that you define. This won't give exactly the result you ask for, instead of None in the dictionary you will have instances of the placeholder. You could then post-process the dict to change the placeholder instances to None if you like. Interesting, so if I used this method I won't be able to use cPickle anymore. The documentation just says that cPickle is faster, but can anyone quantify how much speed I am losing if I move to the regular pickle module? - -- Yi Qiang ([EMAIL PROTECTED]) Web: http://www.yiqiang.net Tel: (206) 661-8469 PGP: 0xB515564B -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEhDw0tXlIMrUVVksRApzBAJ427uRcMuQk6TgqGfWGZu8GjlZWBgCbBTBP 83oVZ9NNswfGrzk58Bat57k= =J5gs -END PGP SIGNATURE- ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem with unpickling an object
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Kent Johnson wrote, On 06/05/2006 07:25 AM: No, the find_global() hook is for cPickle. See the next-to-last paragraph on this page: http://docs.python.org/lib/pickle-sub.html Sorry, I don't follow. How does one get access to the find_global attribute for cPickle? I created an cPickle.Unpickler object, and the only attributes that I have access to are .load and .noload. What am I missing here? - -- Yi Qiang ([EMAIL PROTECTED]) Web: http://www.yiqiang.net Tel: (206) 661-8469 PGP: 0xB515564B -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEhJKWtXlIMrUVVksRAhCYAJ9NFNc601e0QdqUAWOFi1yUrKSvNQCdE/eE NJGCtVG6kYx89bsuLnCmIeo= =CRYn -END PGP SIGNATURE- ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] problem with unpickling an object
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Yi Qiang wrote, On 06/05/2006 01:22 PM: Kent Johnson wrote, On 06/05/2006 07:25 AM: No, the find_global() hook is for cPickle. See the next-to-last paragraph on this page: http://docs.python.org/lib/pickle-sub.html Sorry, I don't follow. How does one get access to the find_global attribute for cPickle? I created an cPickle.Unpickler object, and the only attributes that I have access to are .load and .noload. What am I missing here? Ok, it looks I have to create that attribute. Now, the next confusing part is that the documentation says: 'If it [find_global] is None then any attempts to unpickle instances will raise an UnpicklingError.' What exactly is considered an instance in this context? I tried unpickling a dictionary, and it unpickled just fine. Please, someone explain :) - -- Yi Qiang ([EMAIL PROTECTED]) Web: http://www.yiqiang.net Tel: (206) 661-8469 PGP: 0xB515564B -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEhJUOtXlIMrUVVksRAm8lAJwI1IKZlwiXDRVC+1c73c+ieOmYewCghceY F8Pqth3M/1ufF3hdkPufHv0= =Uavt -END PGP SIGNATURE- ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] crontab or python mistake
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Daniel McQuay wrote, On 05/25/2006 09:24 PM:
Traceback (most recent call last):
File /root/scripts/boxster_school_smtp.py, line 19, in ?
mssg = open('mssg.txt', 'r').read()
IOError: [Errno 2] No such file or directory: ' emmssg.txt'
/snip
Right, but I don't think the CWD for cron is in /root. Try giving it an
absolute path.
- --
Yi Qiang ([EMAIL PROTECTED])
Web: http://www.yiqiang.net
Tel: (206) 661-8469
PGP: 0xB515564B
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[Tutor] question regarding subprocess.Popen
Hi list, I am launching another python program in my python daemon like this: pobj = subprocess.Popen(tlsmd, stdin = subprocess.PIPE, stdout = subprocess.PIPE, stderr = subprocess.STDOUT, close_fds = True, bufsize = 0) I want to detect when the process has exited abnormally (or when I ctrl+c it)so I thought I could use pobj.returncode. However after fiddling with it for a while my KeyboardInterrupt does not seem to be sent to pobj (i tried re-raising a KeyboardInterrupt there as well) nor did testing for pobj.returncode yield any results. Any ideas? Thanks ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] decimal floating point?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 michel maho wrote, On 05/02/2006 07:33 AM: To all I have the following calculation: Je Body Mass Index is,gewicht/lengte**2 The result is a (digital?)floating point figure with with 10 decimal numbers. For = example 27.2345678487 Did I mis something? I would like to reduce it to one or two decimal = numbers.(27.2) but round(_,1) does not work. What exactly doesn't work? n = 27.2345678487 round(n) 27.0 round(n, 2) 27.23 Yi -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.2.2 (GNU/Linux) iD8DBQFEV3C7tXlIMrUVVksRAgBGAJ963EK8jkngIr53NNuT1e1NvoU97gCffslK W/+Q4+/A2hoq3VXC0pR3J+Y= =3RAJ -END PGP SIGNATURE- ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
