[issue7212] Retrieve an arbitrary element from a set without removing it
Willi Richert w.rich...@gmx.net added the comment: No particular reason, besides that it is ripped off of pop(). Your solution (omitting register) gives the same performance. Looks cleaner, of course. The patch tries to provide a clean way of for x in some_set: break, as explained above. See the recent python-dev mailing list musings. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7212 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7212] Retrieve an arbitrary element from a set without removing it
Changes by Willi Richert w.rich...@gmx.net: Removed file: http://bugs.python.org/file15207/setobject_get.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7212 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7212] Retrieve an arbitrary element from a set without removing it
Changes by Willi Richert w.rich...@gmx.net: Added file: http://bugs.python.org/file15211/setobject_get.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7212 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7212] Retrieve an arbitrary element from a set without removing it
Willi Richert w.rich...@gmx.net added the comment: added tests for get() to test_set.py -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7212 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7212] Retrieve an arbitrary element from a set without removing it
New submission from Willi Richert w.rich...@gmx.net: Sometimes, a non-removing pop() is needed. In current Python versions, it can achieved by one of the following ways: 1. x = some_set.pop() some_set.add(x) 2. for x in some_set: break 3. x = iter(some_set).next() More native and clean would, however, be some_set.get() The attached patch does this for set(). If this is accepted by the community, frozenset should be extended as well. -- components: Library (Lib) files: setobject_get.patch keywords: patch messages: 94508 nosy: wrichert severity: normal status: open title: Retrieve an arbitrary element from a set without removing it type: feature request versions: Python 3.1, Python 3.2 Added file: http://bugs.python.org/file15207/setobject_get.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7212 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: what IDE is the best to write python?
Hi, I used eclipse/pydev quite some time. What pulled me back into the arms of emacs was: - ability to save bookmarks (meaning a point in a file) at all the keystrokes. Never found out how to do that in eclipse. In emacs I have now all the times j save at the current working position, f at the last failure I have to work on, and so on. - just faster then pydev. Once pydev tries to understand your python code (refactoring) you can go and get a coffee - ecb, tabbar, psvn provide the same functionality of eclipse you use in everyday. Of course, it takes some time to use emacs. But it pays back with a nice Python integration and the advantage to customize everything you want. wr On Montag, 2. Februar 2009 11:18:48 Jeroen Ruigrok van der Werven wrote: -On [20090201 15:18], Craig (fasteliteprogram...@yahoo.com) wrote: eclipse With the pydev plugin of course. Personally I prefer to just use vim and (i)python. But at work I am using Eclipse with pydev as well. -- http://mail.python.org/mailman/listinfo/python-list
Re: Integrating awk in Python
Hi, take a look at the 5th link at http://tinyurl.com/7s8kfq It's called pyawk. Regards, wr Am Freitag, 16. Januar 2009 13:02:59 schrieb Alfons Nonell-Canals: Hello, I'm developing a software package using python. I've programmed all necessary tools but I have to use other stuff from other people. Most of these external scripts are developed using awk. At the beggining I thought to translate them and program them in python but I prefer to avoid it because it means a lot of work and I should do it after each new version of this external stuff. I would like to integrate them into my python code. I know I can call them using the system environment but it is slower than if I call them inside the package. I know it is possible with C, do you have experience on integrate awk into python calling these awk scripts from python? Thanks in advance! Regards, Alfons. -- http://mail.python.org/mailman/listinfo/python-list
Re: initialising a class by name
Hi,
try the following exemplarily for the os module
import os, types
[(c, klass) for (c,klass) in os.__dict__.items() if
type(klass)==types.ClassType]
will print: [('_Environ', class os._Environ at 0xb7d8114c)]
Regards,
wr
Am Mittwoch, 14. Januar 2009 10:55:27 schrieb Krishnakant:
On Wed, 2009-01-14 at 00:39 -0800, Chris Rebert wrote:
On Wed, Jan 14, 2009 at 12:36 AM, Krishnakant krm...@gmail.com wrote:
On Wed, 2009-01-14 at 00:20 -0800, Chris Rebert wrote:
Aside from Steven's excellent idea, to use the getattr() technique
with your module scheme you'd probably also need to use __import__()
to dynamically import the right module.
I would generally import all the modules I would need at the top of the
main module.
then would use getattr(module,class_name) will that work?
Yes, that is how you'd do it in that case.
By the way, is there a kind of global list of modules/classes which are
maintained in a package once the program is loaded into memory?
happy hacking.
Krishnakant.
Cheers,
Chris
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Re: Multiple values for one key
Hi,
try defaultdict:
In [1]: from collections import defaultdict
In [2]: d=defaultdict(list)
In [3]: d[1].append(7)
In [4]: d[1].append(8)
In [5]: d
Out[5]: defaultdict(type 'list', {1: [7, 8]})
In [6]: d[1]
Out[6]: [7, 8]
Regards,
wr
Am Donnerstag 28 August 2008 19:02:55 schrieb Ron Brennan:
I have another question.
How would like to be able to add the contents on the values for one key.
key['20001']:[978, 345]
How can I do this?
Thanks,
Ron
On Thu, Aug 28, 2008 at 11:56 AM, Bruno Desthuilliers
[EMAIL PROTECTED] wrote:
norseman a écrit :
Terry Reedy wrote:
Ron Brennan wrote:
Hello,
How would I create a dictionary that contains multiple values for
one key.
Make the value a collection object (set or list if you plan to add and
delete).
I'd also like the key to be able to have duplicate entries.
Dict keys must be hashable and unique.
tjr
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First part I understand, second is still giving me a problem.
For some reason I still want keys to be dbf column headers.
like:
name:address:zip so forth
--- --- --
guy: unknown:0
girl: 123 tiny street:12345
boy:321 here:3
gal:999 over there: 5
so forth
Thus one key has many values. And you can then index on whatever key(s)
you wish - name,zip...
You can either use 1/ a list of dicts, or 2/ a dict mapping keys to
lists.
1/
records = [
{name:guy, address:unknown,zip:0},
{name:girl, address:123 tiny street,zip:12345},
{name:boy, address:321 here,zip:3},
{name:gal, address:999 over there,zip:5},
]
keys = (name, address, zip)
print :.join(keys)
print - * len(:.join(keys))
for record in records:
data = [record[key] for key in keys]
print :.join(data)
2/
records = dict(
name=[guy, girl, boy, gal],
address=[unknown,123 tiny street,321 there,999 over there],
zip=[0, 12345, 3, 5]
)
keys = (name, address, zip)
nb_records = len(records[keys[0]])
print :.join(keys)
print - * len(:.join(keys))
for i in xrange(nb_records):
data = [data[key][i] for key in keys]
print :.join(data)
You are of course entitled the right to prefer the second solution, but
then I hope I'll never have to maintain your code, since it's obviously
not an appropriate data structure.
With billions plus records,
With billions plus records, it may be time to move to a serious RDBMS.
Which btw will provide solution 1, or a lighter version of it using a
list of tuples, ie:
cursor = connection.cursor()
cursor.execute(select name, address, zip from peoples)
records = cursor.fetchall()
# at this time, you have :
#records = [
# (guy, unknown,0,),
# (girl, 123 tiny street,12345,),
# (boy, 321 here,3,),
# (gal, 999 over there, 5,),
#]
(snip)
OK - I know I missed the whole concept of a Python Dictionary.
Bad thing for you, since it's the central datastructure in Python.
I haven't read anything as yet that gives a clear picture of what it is
and
what it is for.
Then you failed to read the FineManual's tutorial, which is where you
should have started:
http://docs.python.org/tut/node7.html#SECTION00750
Do yourself a favour : read the above first, then if you still have
questions about dicts, we'll gladly try to help.
And do yourself another favour : learn about SQL, relational model and
RDBMS.
(snip description of why the OP *really* wants a RDBMS)
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Re: Getting pid of a remote process
Hallo, if the remote machines allow ssh login, you might try my SSHRemoteController (a combination of ssh and pexpect). Basically, it simulates a user typing something at the console. Then you can conveniently issue commands at the remote machine like ps ax | grep cmd. http://www.richert.de/free/sshrc/SSHRemoteController-0.1.tar.bz2 Regards, wr srinivasan srinivas2008-08-1906:47:44 HI, I am using Solaris and subprocess.Popen to spawn a process on a remote machine. Thanks, Srini - Original Message From: Diez B. Roggisch [EMAIL PROTECTED] To: python-list@python.org Sent: Monday, 18 August, 2008 9:23:20 PM Subject: Re: Getting pid of a remote process srinivasan srinivas schrieb: Hi, Could you please suggest me a way to find pid of a process started on a remote machine by the current process?? I should get pid in the current process environment. The approach should be somewhat generic. It shouldn't expect the remote process to print its pid. Without information about - the OS you use - the technique you use for spawning processes remote there is no answer to this. Diez -- http://mail.python.org/mailman/listinfo/python-list Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/ -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Development for dual core machine
Andy wrote: Thanks guys for the suggestions. Andy It might be that you have to set the CPU affinity for your python process so that it works at all. I had that problem on a dual core machine with hyperthread enabled. Using taskset (http://www.linuxcommand.org/man_pages/taskset1.html) helped solving the problem: taskset -c CPU# python ... Best regards, wr -- pinkrose.dhis.org, -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting to an SSH account over a HTTP proxy
Am Dienstag, 23. Januar 2007 02:16 schrieb Nanjundi:
BJörn Lindqvist wrote:
I want to use Python to connect to a SSH account over a HTTP proxy to
automate some operations. I thought paramiko would be able to do that,
but it can not (it seems).
Is there some other Python module that can do what I want?
--
mvh Björn
Did you take a look at twisted library?
twistedmatrix.com
http://twistedmatrix.com/projects/core/documentation/howto/clients.html
I haven't tried to connect over port 80, but its worth a try.
-N
If you need it for automation you might want to use pexpect:
http://pexpect.sourceforge.net/
It listens to the tty-stream and simulates a user typing in commands. It is
very useful, e.g. if you want to start processes on many machines over ssh.
If there are gateways/firewalls between - no problem just use a
second sendline('ssh [EMAIL PROTECTED]')
The only problem is the regular expression: If e.g. you use a custom $PS1
variable for your prompt you have to account for that.
Regards,
wr
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Pythonic A*-Algorithm
Hi, I'm looking for an A* implementation in Python (at least some wrapper around a C lib). So far I've only found http://arainyday.se/projects/python/AStar/ which looks not so promising. http://wiki.python.org/moin/PythonGraphApi lists all major available graph libraries in Python, hoping to find a path to some standard Python graph library (as DBAPI). But none of them seems to have a decent A*-implementation (at least with Fibonacci-heap, as pqueue is supposed to be). I know I could implement it myself as it is not that complicated, but I would rather like to align my project to some already existing and well established graph library containing A*. Thanks, wr -- http://mail.python.org/mailman/listinfo/python-list
Priority based concurrent execution
Hi, I have a simulation application (PlayerStage) in which the robot is asked every ~200ms for an action. In the meantime the robot has to do some calculation with the perception. As the calculation gets more and more time consuming I am thinking about outsourcing it into a concurrently running method. If the calculation takes too long it would be ok for the result to be incorporated in some future cycle of the main loop, resulting in the calculation being done less and less often and the main loop executing some stop behavior. My question: Is there a possibility in Python (either with the threading module or with Twisted's non-threading style) to prioritize the two (pseudo-)concurrent methods so that the main tread is further on executed every ~200ms and the calculation thread being executed only in idle time slots? Thanks, wr -- http://mail.python.org/mailman/listinfo/python-list
