ANN: SciPy 2009 early registration ends today
Today is the last day to register for SciPy 2009 at the early bird rates. Please register (http://conference.scipy.org/to_register ) by the end of the day to take advantage of the reduced early registration rate. The conference schedule is available here: http://conference.scipy.org/schedule The special group rate for the Marriot Hotel is no longer available. However, there are a number of closer and less expensive choices still available: http://admissions.caltech.edu/visiting/accommodations I've been staying at the Vagabond Inn for the last several years: http://www.vagabondinn-pasadena-hotel.com/ It is within easy walking distance of the conference and has just been completely renovated. Rooms at the Vagabond start at $79/night. About the conference SciPy 2009, the 8th Python in Science conference, will be held from August 18-23, 2009 at Caltech in Pasadena, CA, USA. The conference starts with two days of tutorials to the scientific Python tools. There will be two tracks, one for introduction of the basic tools to beginners, and one for more advanced tools. The tutorials will be followed by two days of talks. Both days of talks will begin with a keynote address. The first day’s keynote will be given by Peter Norvig, the Director of Research at Google; while, the second keynote will be delivered by Jon Guyer, a Materials Scientist in the Thermodynamics and Kinetics Group at NIST. The program committee will select the remaining talks from submissions to our call for papers. All selected talks will be included in our conference proceedings edited by the program committee. After the talks each day we will provide several rooms for impromptu birds of a feather discussions. Finally, the last two days of the conference will be used for a number of coding sprints on the major software projects in our community. For the 8th consecutive year, the conference will bring together the developers and users of the open source software stack for scientific computing with Python. Attendees have the opportunity to review the available tools and how they apply to specific problems. By providing a forum for developers to share their Python expertise with the wider commercial, academic, and research communities, this conference fosters collaboration and facilitates the sharing of software components, techniques, and a vision for high level language use in scientific computing. For further information, please visit the conference homepage: http://conference.scipy.org. Important Dates --- * Friday, July 3: Abstracts Due * Wednesday, July 15: Announce accepted talks, post schedule * Wednesday, July 22: Early Registration ends * Tuesday-Wednesday, August 18-19: Tutorials * Thursday-Friday, August 20-21: Conference * Saturday-Sunday, August 22-23: Sprints * Friday, September 4: Papers for proceedings due Executive Committee --- * Jarrod Millman, UC Berkeley, USA (Conference Chair) * Gaël Varoquaux, INRIA Saclay, France (Program Co-Chair) * Stéfan van der Walt, University of Stellenbosch, South Africa (Program Co-Chair) * Fernando Pérez, UC Berkeley, USA (Tutorial Chair) -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
ANN: easygconf 0.01
I'm happy to announce easygconf 0.01
Get it at http://www.florian-diesch.de/software/easygconf/
easygconf provids an easy, pythonic way to access GConf
http://projects.gnome.org/gconf/ through a dict-like interface.
Example
---
from easygconf import GConfDict
gc=GConfDict('/apps/test-application')
gc['title']
gc['title']='Hello world!'
gc['title']
'Hello world!'
gc['list']=range(3)
gc['list']
(0, 1, 2)
gc.unset('title')
gc.unset('list')
gc['title']
gc['list']
gc.sync()
Florian
--
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Support the Python Software Foundation:
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[ANN] EuroSciPy 2009 - first slides
EuroSciPy 2009 - First Slides Available === The first slides for the talks at EuroSciPy are available: http://www.euroscipy.org/presentations/slides/index.html The abstracts of all talks can be found here: http://www.euroscipy.org/presentations/abstracts/index.html EuroSciPy 2009 == We're pleased to announce the EuroSciPy 2009 Conference to be held in Leipzig, Germany on July 25-26, 2009. http://www.euroscipy.org This is the second conference after the successful conference last year. Again, EuroSciPy will be a venue for the European community of users of the Python programming language in science. Presentation Schedule - The schedule of presentations for the EuroSciPy conference is online: http://www.euroscipy.org/presentations/schedule.html We have 16 talks from a variety of scientific fields. All about using Python for scientific work. Registration The registration fee is 150.00 € and will increase to 200.00 € for on-site registration and registration after July 23, 2009. Registration will include snacks and lunch for Saturday and Sunday. Please register here: http://www.euroscipy.org/registration.html Important Dates --- March 21Registration opens May 8 Abstract submission deadline May 15 Acceptance of presentations May 30 Announcement of conference program June 15 Early bird registration deadline July 15 Slides submission deadline July 20 - 24Pre-Conference courses July 25/26 Conference August 15 Paper submission deadline Venue - mediencampus Poetenweg 28 04155 Leipzig Germany See http://www.euroscipy.org/venue.html for details. Help Welcome You would like to help make the EuroSciPy 2009 a success? Here are some ways you can get involved: * attend the conference * submit an abstract for a presentation * give a lightning talk * make EuroSciPy known: - distribute the press release (http://www.euroscipy.org/media.html) to scientific magazines or other relevant media - write about it on your website - in your blog - talk to friends about it - post to local e-mail lists - post to related forums - spread flyers and posters in your institution - make entries in relevant event calendars - anything you can think of * inform potential sponsors about the event * become a sponsor If you're interested in volunteering to help organize things or have some other idea that can help the conference, please email us at mmueller at python-academy dot de. Sponsorship --- Do you like to sponsor the conference? There are several options available: http://www.euroscipy.org/sponsors/become_a_sponsor.html Pre-Conference Courses -- Would you like to learn Python or about some of the most used scientific libraries in Python? Then the Python Summer Course [1] might be for you. There are two parts to this course: * a two-day course Introduction to Python [2] for people with programming experience in other languages and * a three-day course Python for Scientists and Engineers [3] that introduces some of the most used Python tools for scientists and engineers such as NumPy, PyTables, and matplotlib Both courses can be booked individually [4]. Of course, you can attend the courses without registering for EuroSciPy. [1] http://www.python-academy.com/courses/python_summer_course.html [2] http://www.python-academy.com/courses/python_course_programmers.html [3] http://www.python-academy.com/courses/python_course_scientists.html [4] http://www.python-academy.com/courses/dates.html -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
Re: comments? storing a function in an object
In article f3d88edf-b5d3-43e4-89a3-b05ef0f55...@p28g2000vbn.googlegroups.com, Carl Banks pavlovevide...@gmail.com wrote: You have to be REALLY REALLY careful not to pass any user-supplied data to it if this is a server running on your computer, of course. Unless, of course, your users are paying for this service. -- Aahz (a...@pythoncraft.com) * http://www.pythoncraft.com/ The volume of a pizza of thickness 'a' and radius 'z' is given by pi*z*z*a -- http://mail.python.org/mailman/listinfo/python-list
Re: JavaScript toolkits (was Re: ANN: Porcupine Web Application Server 0.6 is released!)
In article mailman.3451.1248139114.8015.python-l...@python.org, D'Arcy J.M. Cain da...@druid.net wrote: On 20 Jul 2009 17:10:55 -0700 a...@pythoncraft.com (Aahz) wrote: I understand what you want but I can't see how a toolkit can do that. How do you program graceful? It seems pretty application specific. Presumably the JS toolkit generates both code and HTML. Actions that normally get executed by JS should degrade to plain HTML links and form submits (or possibly not display at all if it's a pure convenience). As I said, I do understand what you are after but I still think it is a judgement call. What defines convenience? How does the library know what is essential and what is pretty? Presumably a JS toolkit designed for this purpose would have an API to specify the handling of such issues. -- Aahz (a...@pythoncraft.com) * http://www.pythoncraft.com/ The volume of a pizza of thickness 'a' and radius 'z' is given by pi*z*z*a -- http://mail.python.org/mailman/listinfo/python-list
Re: JavaScript toolkits (was Re: ANN: Porcupine Web Application Server 0.6 is released!)
In article 1c994086-8c58-488f-b3b3-6161c4b2b...@k30g2000yqf.googlegroups.com, Paul Boddie p...@boddie.org.uk wrote: On 20 Jul, 18:00, a...@pythoncraft.com (Aahz) wrote: Out of curiosity, are there any JavaScript toolkits that generate code that degrades gracefully when JavaScript is disabled? You mean Web toolkits which use JavaScript, I presume. I have written (and use myself) a toolkit/framework called XSLForms (part of the XSLTools distribution) which supports in-page updates (AJAX, effectively) that degrade to vanilla whole-page requests if JavaScript is switched off: http://www.boddie.org.uk/python/XSLTools.html Thanks! I'll take a look after OSCON. -- Aahz (a...@pythoncraft.com) * http://www.pythoncraft.com/ The volume of a pizza of thickness 'a' and radius 'z' is given by pi*z*z*a -- http://mail.python.org/mailman/listinfo/python-list
MySQLdb for Python 3.1 getting close?
Is MySQLdb available for Python 3.1 yet? http://sourceforge.net/projects/mysql-python/ says the last supported Python version is 2.5. Any progress in sight? John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Help understanding the decisions *behind* python?
En Wed, 22 Jul 2009 11:36:51 -0300, Inky 788 inky...@gmail.com escribió: On Jul 22, 2:36 am, Hendrik van Rooyen hend...@microcorp.co.za wrote: The good reason is the immutability, which lets you use a tuple as a dict key. Thanks for the reply Hendrik (and Steven (other reply)). Perhaps I'm just not sophisticated enough, but I've never wanted to use a list/ tuple as a dict key. This sounds like obscure usage, and a bit contrived as a reason for having *both* lists and tuples. Many people posted useful examples of tuples as dictionary keys in this thread. Just to add another one (emulate SQL GROUP BY): ope_by_dept = defaultdict(int) total_times = defaultdict(float) for dept_name, ope_name, ope_date, engineer in list_of_operations: ope_by_dept[dept_name, ope_start.month] += 1 total_times[dept_name, engineer] += ope_end - ope_start print Operations per department per month for dept_name, month in sorted(ope_by_dept): print dept_name, month, ope_by_dept[dept_name, month] -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: logging outgoing HTTP POST message and incoming response message
En Wed, 22 Jul 2009 18:18:37 -0300, scriptlear...@gmail.com
scriptlear...@gmail.com escribió:
On Jul 22, 1:54 pm, Diez B. Roggisch de...@nospam.web.de wrote:
You can use proxy-tools such as tcpmon or sniff traffic using wireshark.
Thanks,
but I am trying to enable some debug mode to log all outgoing and
incoming messages for certain period of time, and running another
proxy-tool is not very ideal. It would be great to log it in some log
file.
You may install a custom HTTPHandler:
class LoggingHTTPConnection(httplib.HTTPConnection):
def request(self, method, url, body=None, headers={}):
print method, url, headers
httplib.HTTPConnection.request(self, method, url, body, headers)
def getresponse(self):
response = httplib.HTTPConnection.getresponse(self)
print response.status, response.msg
return response
class LoggingHTTPHandler(urllib2.HTTPHandler):
def http_open(self, req):
return self.do_open(LoggingHTTPConnection, req)
opener = urllib2.build_opener(LoggingHTTPHandler, ...)
--
Gabriel Genellina
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Re: python function for retrieving key and encryption
On Jul 21, 8:59 pm, Piet van Oostrum p...@cs.uu.nl wrote:
jayshree jayshree06c...@gmail.com (j) wrote:
j M2Crypto package not showing the 'recipient_public_key.pem' file at
j linux terminal .how do i get/connect with recipient public key.
j exactly i need to check how can i open this file through linux
j commands.
j import M2Crypto def encrypt(): recip = M2Crypto.RSA.load_pub_key(open
j ('recipient_public_key.pem','rb').read()) print recip; plaintext =
j whatever i need to encrypt msg = recip.public_encrypt
j (plaintext,RSA.pkcs1_padding) print msg;
j after calling the function its not giving any output and even any
j error
j i also tried as 'Will' said
j pk = open('public_key.pem','rb').read() print pk; rsa =
j M2Crypto.RSA.load_pub_key(pk)
j whats the mistake i am not getting .will somebody help me out.
j is something wrong in opening 'recipient_public_key.pem'. is M2Crypto
j contain this file inbuilt .from where this file taking public key of
j the recipient i'. what this file contain and how it will work .should
j i need to create such a file for my purpose.if it is then how can i
j create this and how it will retrieve the key,where i recognize my
j recipient to get his public key .is something like database at server.
j please give me a quick response..
j looking for your answer.
Please:
1. Type your python code with newlines and proper indentation.
2. Show the error messages that your code gives when you run it.
3. Use proper capital letters at the beginning of your sentences.
4. Don't fire so many questions in rapid succession.
The recipient_public_key.pem file is the public key of the recipient
which means the person that is going to receive the encrypted message.
You should get it from the recipient him/herself or from some key store
where s/he has deposited it.
--
Piet van Oostrum p...@cs.uu.nl
URL:http://pietvanoostrum.com[PGP 8DAE142BE17999C4]
Private email: p...@vanoostrum.org- Hide quoted text -
- Show quoted text -
Here is the code that i used
import M2Crypto
from M2Crypto import RSA
def encrypt():
recip = M2Crypto.RSA.load_pub_key(open
('recipient_public_key.pem','rb').read())
#recip = M2Crypto.RSA.load_pub_key('recipient_public_key.pem')
print recip;
plaintext = whatever i need to encrypt
msg = recip.public_encrypt(plaintext,RSA.pkcs1_padding)
print msg;
encrypt()
error coming like - IOError: [Errno 2] No such file or directory:
'recipient_public_key.pem'
Is this not the inbuilt file.
How should i create such type of file.
--
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Re: ANN: Shed Skin 0.2, an experimental (restricted) Python-to-C++ compiler
On 23-07-2009, Kurt Smith wrote: On Wed, Jul 22, 2009 at 2:48 AM, Bearophilebearophileh...@lycos.com wrote: greg: Posting benchmark times for Pyrex or Cython is pretty meaningless without showing the exact code that was used, since times can vary enormously depending on how much you C-ify things. Was this link, shown by William, not enough? http://hg.flibuste.net/libre/games/cheval/file/46797c3a5136/chevalx.pyx#l1 I took a stab at converting the recent psyco-optimized code to cython, and got a speedup. thanks, i updated my repo with litle more tips. -- William Dodé - http://flibuste.net Informaticien Indépendant -- http://mail.python.org/mailman/listinfo/python-list
Re: binary literal
On Wednesday 22 July 2009 12:03:44 superpollo wrote:
can i do something like the above, but using a *binary* number? (e.g.
00101101 instead of 45) ?
00101101 is not hex 45.
hex 45 is 01000101
chr(int('01000101',2))
'E'
- Hendrik
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[Unblocking VoIP in UAE] for freedom!
Please view this newsletter online at: http://www.mynewsletterbuilder.com/tools/view_newsletter.php?newsletter_id=1409985533 SpeedVoIP Communication Technology Co., LTD. - 600, 6th Avenue S.W. - Calgary - Alberta - T2P 0S5 Subscribe to this newsletter: https://www.mynewsletterbuilder.com/tools/subscription.php?username=svsalessend_id=712043215l=snewsletter_id=1409985533 Unsubscribe python-list@python.org: https://www.mynewsletterbuilder.com/tools/subscription.php?username=svsalessend_id=712043215l=uemail=python-l...@python.org Change your preferences: https://www.mynewsletterbuilder.com/tools/subscription.php?username=svsalessend_id=712043215l=pemail=python-l...@python.org Forward to a friend: http://www.mynewsletterbuilder.com/tools/forward.php?username=svsalesnewsletter_id=1409985533email=python-l...@python.orgsend_id=712043215 Report this email as spam: https://www.mynewsletterbuilder.com/tools/abuse_report.php?username=svsalessend_id=712043215email=python-l...@python.org This email was sent using MyNewsletterBuilder.com. -- http://mail.python.org/mailman/listinfo/python-list
Re: Changing the private variables content
Ryniek90 wrote:
Got it:
exec('self.' + attr + '=\'' + val + '\'')
That worked. I think it'll do what you want now ;)
Ching-Yun Xavier Ho, Technical Artist
Contact Information
Mobile: (+61) 04 3335 4748
Skype ID: SpaXe85
Email: cont...@xavierho.com mailto:cont...@xavierho.com
Website: http://xavierho.com/
To bad, that didn't worked in my class. Still the same error:
mod.print_module('socket')
Traceback (most recent call last):
File pyshell#121, line 1, in module
mod.print_module('socket')
File pyshell#118, line 51, in print_module
module_open = open(self._this_module, 'rb')
IOError: [Errno 2] No such file or directory: ''
:-/
What is the point of the _SetVar method?
Instead of:
self._SetVar(self._this_module, os.path.join(root, f))
just do:
self._this_module = os.path.join(root, f)
(unless I'm misunderstanding what you're trying to do!)
Of course i;ve tried, but still get the same error:
mod.print_module('socket')
Traceback (most recent call last):
File pyshell#121, line 1, in module
mod.print_module('socket')
File pyshell#118, line 51, in print_module
module_open = open(self.this_module, 'rb')
IOError: [Errno 2] No such file or directory: ''
It looks like private variable have specific naure, that prevent from
traditional editing them.
Still searching for some tuts about private methods and variables.
No. There is nothing special about variables with a leading underscore.
_number
is treated by Python *exactly* the same as
number
. The specific problem in your code above is your _SetVar function,
among the more general problem of not yet having a good understanding of
classes in Python. Keep studying, Python is an awesome language.
I was able to make this work -- hope it helps.
8---
import os
import sys
class ModPrint(object):
uThis will be the doc.
def __init__(self):
self._default_search_path = sys.exec_prefix
def _search_for_module(self, chosen_module, search_path):
for root, dirs, files in os.walk(search_path):
for f in files:
if f == (%s.py % chosen_module):
return os.path.join(root, f)
def print_module(self, chosen_module, user_search_path=''):
search_path = user_search_path or self._default_search_path
module = self._search_for_module(chosen_module, search_path)
if module is not None:
module_open = open(module, 'rb')
module_text = module_open.read()
module_open.close()
return module_text
return 'Module not found...'
8---
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how two join and arrange two files together
Hi, I have two large files: FileA 15 ALA H = 8.05 N = 119.31 CA = 52.18 HA = 4.52 C = 21 ALA H = 7.66 N = 123.58 CA = 54.33 HA = C = 179.35 23 ALA H = 8.78 N = CA = HA = C = 179.93. and FileB 21 ALA helix (helix_alpha, helix2) 23 ALA helix (helix_alpha, helix3) 38 ALA helix (helix_alpha, helix3)... now what i want that i will make another file in which i will join the two file in such a way that only matching entries will come like here 21 and 23 ALA is in both files, so the output will be something like:- 21 ALA H = 7.66 N = 123.58 CA = 54.33 HA = C = 179.35| 21 ALA helix (helix_alpha, helix2) 23 ALA H = 8.78 N = CA = HA = C = 179.93|23 ALA helix (helix_alpha, helix3) and further i will make another file in which i will be able to put those lines form this file based on the missing atom value, like for 21 ALA HA is not defined so i will put it another file based on its HA missing value similarly i will put 23 ALA on another file based on its missing N,CA and HA value. I tried to join the two file based on their matching entries by:--- from collections import defaultdict if __name__ == __main__: ... a = open(/home/amrita/alachems/chem100.txt) ... c = open(/home/amrita/secstr/secstr100.txt) ... def source(stream): ... return (line.strip() for line in stream) ... ... def merge(sources): ... for m in merge([source(a),source(c)]): ... print |.join(c.ljust(10) for c in m) ... but it is not giving any value. Thanks, Amrita Kumari Research Fellow IISER Mohali Chandigarh INDIA -- http://mail.python.org/mailman/listinfo/python-list
Re: Help understanding the decisions *behind* python?
On Wednesday 22 July 2009 16:36:51 Inky 788 wrote: On Jul 22, 2:36 am, Hendrik van Rooyen hend...@microcorp.co.za wrote: The good reason is the immutability, which lets you use a tuple as a dict key. Thanks for the reply Hendrik (and Steven (other reply)). Perhaps I'm just not sophisticated enough, but I've never wanted to use a list/ tuple as a dict key. This sounds like obscure usage, and a bit contrived as a reason for having *both* lists and tuples. Steven showed why you cannot have a mutable thing as a key in a dict. if you think it is contrived, then please consider how you would keep track of say the colour of a pixel on a screen at position (x,y) - this is about the simplest natural tuple format and example. There are other equally valid examples, as has been pointed out. (may have been in another thread - am a bit confused about that right now) - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
Re: Ideas for problem with chat server application!
David Adamo Jr. wrote: cut My attempt was to create a windows service that start automatically and runs this batch file using a Network Service account on the server system. Although, I'm having a hard time with this (temporarily), I would love to ask if there are any alternatives to using a windows service. Suggestions are highly appreciated. This is definitely the right way to go, perhaps reviewing a template which I use for windows services may help you: http://blog.dcuktec.com/2009/07/python-windows-service-template.html -- MPH http://blog.dcuktec.com 'If consumed, best digested with added seasoning to own preference.' -- http://mail.python.org/mailman/listinfo/python-list
Re: how two join and arrange two files together
On Thu, Jul 23, 2009 at 12:22 AM, amr...@iisermohali.ac.in wrote: Hi, I have two large files: FileA 15 ALA H = 8.05 N = 119.31 CA = 52.18 HA = 4.52 C = 21 ALA H = 7.66 N = 123.58 CA = 54.33 HA = C = 179.35 23 ALA H = 8.78 N = CA = HA = C = 179.93. and FileB 21 ALA helix (helix_alpha, helix2) 23 ALA helix (helix_alpha, helix3) 38 ALA helix (helix_alpha, helix3)... now what i want that i will make another file in which i will join the two file in such a way that only matching entries will come like here 21 and 23 ALA is in both files, so the output will be something like:- 21 ALA H = 7.66 N = 123.58 CA = 54.33 HA = C = 179.35| 21 ALA helix (helix_alpha, helix2) 23 ALA H = 8.78 N = CA = HA = C = 179.93|23 ALA helix (helix_alpha, helix3) and further i will make another file in which i will be able to put those lines form this file based on the missing atom value, like for 21 ALA HA is not defined so i will put it another file based on its HA missing value similarly i will put 23 ALA on another file based on its missing N,CA and HA value. I tried to join the two file based on their matching entries by:--- from collections import defaultdict if __name__ == __main__: ... a = open(/home/amrita/alachems/chem100.txt) ... c = open(/home/amrita/secstr/secstr100.txt) ... def source(stream): ... return (line.strip() for line in stream) ... ... def merge(sources): ... for m in merge([source(a),source(c)]): ... print |.join(c.ljust(10) for c in m) ... but it is not giving any value. You never actually called any of your expletive deleted functions. Slightly corrected version: from collections import defaultdict def source(stream): return (line.strip() for line in stream) def merge(sources): for m in sources: print |.join(c.ljust(10) for c in m) if __name__ == __main__: a = open(/home/amrita/alachems/chem100.txt) c = open(/home/amrita/secstr/secstr100.txt) merge([source(a), source(c)]) It's still not sophisticated enough to give the exact output you're looking for, but it is a step in the right direction. You really should try asking someone from your CS Dept to help you. It would seriously take a couple hours, at most. - Chris -- Still brandishing a cluestick a vain... http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: comments? storing a function in an object
On Jul 22, 8:38 pm, a...@pythoncraft.com (Aahz) wrote: In article f3d88edf-b5d3-43e4-89a3-b05ef0f55...@p28g2000vbn.googlegroups.com, Carl Banks pavlovevide...@gmail.com wrote: You have to be REALLY REALLY careful not to pass any user-supplied data to it if this is a server running on your computer, of course. Unless, of course, your users are paying for this service. Well, yes, but I assume that by the time you're deliberately letting users pay to run their programs on your server, you will already have deployed a full-blown, multi-tiered security strategy that includes validation by the server process. That was sort of beyond the scope of the OP's question. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: PyQt GUI
I believe I now have vtkpython.exe. However, my 'import vtk' statement in my python code is not working. The error says something like no module named vtk. Where do I find modules for vtk in pyqt? Do they exist? They must, right? Because there are people using vtk in pyqt? Or do I have to use OpenGL? Confused... Helvin -- http://mail.python.org/mailman/listinfo/python-list
Re: How to document Python code properly for Pydoc
Thanks very much for your help On Wed, Jul 22, 2009 at 6:43 PM, Lie Ryan lie.1...@gmail.com wrote: jorma kala wrote: Hi, Do you know where I can find the rules for documenting Python code, so that automatic document generation with Pydoc makes the most of the comments inserted in the code? I know about documenting class and method through triple quote just under the class definition. But how do you comment a specific field or variable, or how do you document function arguments so that they are extracted like in javadoc? Thanks very much pydoc is a simple tool, and doesn't do much. You write in freeform, although generally you'll do something like this: def myfunc(a, b): ''' short description of myfunc longer description of myfunc, if necessary, and typically includes description of the arguments and the behaviors. Also includes the description of the return value. ''' pass pydoc doesn't recognize any special markups. If you want to get more from the docstring, you need other documentation generator such as epydoc, Doxygen, or Sphinx. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: binary literal
Hendrik van Rooyen wrote:
On Wednesday 22 July 2009 12:03:44 superpollo wrote:
can i do something like the above, but using a *binary* number? (e.g.
00101101 instead of 45) ?
00101101 is not hex 45.
hex 45 is 01000101
whoopsie daisie!
chr(int('01000101',2))
'E'
much obliged.
bye
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strange error when trying to log something
Hi,
I've recently reinstalled Python 2.6 (from DMG) on my Mac, and I am
running into very strage errors. Namely, logging seems to be badly
broken. When I open the interpreter through Django's manage.py shell
and try to use logging, I get the following error:
logging.critical('ala')
Traceback (most recent call last):
File ipython console, line 1, in module
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 1416, in critical
root.critical(*((msg,)+args), **kwargs)
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 1074, in critical
self._log(CRITICAL, msg, args, **kwargs)
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 1142, in _log
record = self.makeRecord(self.name, level, fn, lno, msg, args,
exc_info, func, extra)
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 1117, in makeRecord
rv = LogRecord(name, level, fn, lno, msg, args, exc_info, func)
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 272, in __init__
from multiprocessing import current_process
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/multiprocessing/__init__.py, line 64, in module
from multiprocessing.util import SUBDEBUG, SUBWARNING
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/multiprocessing/util.py, line 121, in module
_afterfork_registry = weakref.WeakValueDictionary()
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/weakref.py, line 51, in __init__
UserDict.UserDict.__init__(self, *args, **kw)
TypeError: unbound method __init__() must be called with UserDict
instance as first argument (got WeakValueDictionary instance instead)
I was able to silence the error (and be able to work normally) by
making UserDict.UserDict inherit from object.
Any ideas what is causing the error? Before I updated Python
everything was fine. Am I breaking a lot of things by making
UserDict.UserDict a new style class?
Thanks in advance for any insight.
-- Ryszard Szopa
--
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Re: What is file.encoding convention?
What is file.encoding convention? If I want to write a unicode string to a file(-like) that have encoding attribute, I should do (1) try: file.write(unicode_str), (2) except UnicodeEncodeError: file.write(unicode_str.encode (file.encoding)) like logging? It seems agly. s/agly/ugly/ -- http://mail.python.org/mailman/listinfo/python-list
Re: strange error when trying to log something
Ryszard Szopa wrote:
Hi,
I've recently reinstalled Python 2.6 (from DMG) on my Mac, and I am
running into very strage errors. Namely, logging seems to be badly
broken. When I open the interpreter through Django's manage.py shell
and try to use logging, I get the following error:
logging.critical('ala')
Traceback (most recent call last):
File ipython console, line 1, in module
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 1416, in critical
root.critical(*((msg,)+args), **kwargs)
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 1074, in critical
self._log(CRITICAL, msg, args, **kwargs)
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 1142, in _log
record = self.makeRecord(self.name, level, fn, lno, msg, args,
exc_info, func, extra)
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 1117, in makeRecord
rv = LogRecord(name, level, fn, lno, msg, args, exc_info, func)
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/logging/__init__.py, line 272, in __init__
from multiprocessing import current_process
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/multiprocessing/__init__.py, line 64, in module
from multiprocessing.util import SUBDEBUG, SUBWARNING
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/multiprocessing/util.py, line 121, in module
_afterfork_registry = weakref.WeakValueDictionary()
File /Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/weakref.py, line 51, in __init__
UserDict.UserDict.__init__(self, *args, **kw)
TypeError: unbound method __init__() must be called with UserDict
instance as first argument (got WeakValueDictionary instance instead)
I was able to silence the error (and be able to work normally) by
making UserDict.UserDict inherit from object.
Any ideas what is causing the error? Before I updated Python
everything was fine. Am I breaking a lot of things by making
UserDict.UserDict a new style class?
Thanks in advance for any insight.
-- Ryszard Szopa
I have a hunch that you are triggering a reload() somewhere. Example:
Python 2.6.2 (release26-maint, Apr 19 2009, 01:58:18)
[GCC 4.3.3] on linux2
Type help, copyright, credits or license for more information.
import weakref
weakref.WeakValueDictionary()
WeakValueDictionary at 140598938447312
import UserDict
reload(UserDict)
module 'UserDict' from '/usr/lib/python2.6/UserDict.pyc'
weakref.WeakValueDictionary()
Traceback (most recent call last):
File stdin, line 1, in module
File /usr/lib/python2.6/weakref.py, line 51, in __init__
UserDict.UserDict.__init__(self, *args, **kw)
TypeError: unbound method __init__() must be called with UserDict instance
as first argument (got WeakValueDictionary instance instead)
Try restarting the interpreter after any change to source files.
Peter
--
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Re: If Scheme is so good why MIT drops it?
On Wed, 22 Jul 2009 15:17:52 -0700, Carl Banks wrote: So do all these OSes have some kind of __mega_unifying_poll system call that works for anything that might possibly block, that you can exploit from a user process? Threads ;) They also have the advantage that one thread can run while another is waiting on disk I/O, which isn't something which can be done with a select/poll interface (even if select/poll worked for files, it doesn't help for mapped files). -- http://mail.python.org/mailman/listinfo/python-list
Re: challenging problem for changing to a dedicated non-privileged user within a script.
On Thu, 2009-07-23 at 00:17 +0200, Piet van Oostrum wrote: Being a sudoer is not a privilege to issue the os.setuid system call. It is only a permission to use the sudo command. Yes, So I would like to know if python can change the user to some other non-privileged user during the script execution? K I tryed using subprocess but that did not help me either. I tryed sudo K su into the Popen command but it throws me into the terminal (shell) K with postgres as the user. You could execute the command: sudo -u postgres required_command with subprocess. Ok, but the problem is much more complex. What if I want to do the following. 1, change the user for a particular script to the postgres user. 2. now execute the python code for connecting to the postgresql database. In the second point I actually want to execute python code not shell level command so will the sudo -u in the subprocess.Popen change the user in the script? In short I would just like to have the script run under another user let's say postgres as long as a certain action is going on, for example connecting to the postgresql database. You have another problem then: your password must be supplied unless the NOPASSWD flag is set in the sudoers file. That is clear, the only problem is that I want the script to run as postgres user although it was started by the user kk. happy hacking. Krishnakant. -- http://mail.python.org/mailman/listinfo/python-list
available formats and params for Image.save()
Hi, Somehow I have difficulties reading the documentation for PIL (Image) Is there an easy way to know which formats are supported and what their names are? Is there an easy way to know which parameters are supported by Image.save(). How can I list them where are they documented? Somehow I consider the documentation to be a little weak on this points. all the documentation says (at least where I looked) is: class Image | Methods defined here: . . . save(self, fp, format=None, **params) | Save image to file or stream In order to find out how the format name for a .jpg file I did following: import Image img = Image.open(afile.jpg) print img.format Then I saw, that the result was 'JPEG' and not 'JPG' as I tried first I'm at a complete loss at finding out what parameters the save function accepts for saving a JPG file or a PNG file Is there an easy way of finding this in any doc or do I have to dive into the sources. If there's no easy way: Wouldn't a better documentation increase the 'user experience'? Thanks in advance for any pointers N -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple versions of python
On Tue, 21 Jul 2009 10:19:42 -0400, Dave Angel wrote: The other thing you may want to do in a batch file is to change the file associations so that you can run the .py file directly, without typing python or pythonw in front of it. The relevant Windows commands are: assoc and ftype However: assoc and ftype modify the registry keys under HKLM\Software\Classes. This works fine if these are the only relevant keys, but if you also have settings under HKCU\Software\Classes, those will take precedence, so assoc and/or ftype won't have any effect. Also, you typically need at least Power User status in order to modify the keys under HKLM, while any user should be able to modify those under HKCU (HKCU is a virtual key, corresponding to HKU\interactive user). -- http://mail.python.org/mailman/listinfo/python-list
raster (PIL)
hi. i wrote a program which transforms a string of zeroes ando ones into a png file. #!/usr/bin/env python import Image import sys bits_in_a_byte = 8 raster_string = \ 0010010000101000 00100100101010100100 00001110001010100100 00100100101010100100 0010010000000000 0010 10101001 1010 10101000 00001000 raster_lines = raster_string.splitlines() high = len(raster_lines) wide = len(raster_lines[0]) bytes_in_a_row = wide/bits_in_a_byte bitmap = for raster_line in raster_lines: for byte_count in range(bytes_in_a_row): first_bit = byte_count*bits_in_a_byte bitmap += chr(int(raster_line[first_bit:first_bit+bits_in_a_byte] , 2)) im = Image.fromstring(1, (wide , high) , bitmap) im.save(sys.stdout , PNG) any suggestions for improvement? bye -- http://mail.python.org/mailman/listinfo/python-list
Re: Help understanding the decisions *behind* python?
2009/7/22 Inky 788 inky...@gmail.com: Thanks for the reply Hendrik (and Steven (other reply)). Perhaps I'm just not sophisticated enough, but I've never wanted to use a list/ tuple as a dict key. This sounds like obscure usage, and a bit contrived as a reason for having *both* lists and tuples. If you are used to working in a language that doesn't allow it then you'll probably carry on using the work-arounds that you have always used. It almost certainly only seems obscure because you're not considering it when it would be a natural solution. In a language that builds *very* heavily on the concept of dictionaries it's not obscure at all! -- Tim Rowe -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: Shed Skin 0.2, an experimental (restricted) Python-to-C++ compiler
srepmub mark.duf...@gmail.com wrote: please send any program that doesn't work with shedskin (it still is experimental after all) to me, or create an issue at shedskin.googlecode.com, and I will have a look at the problem. I divided and conquered the program as suggested and eventually I got it to compile and run correctly :-) I learnt that if you have lots of variables with indeterminate type then shedskin takes a very long time indeed before blowing up! I also learnt that shedskin doesn't support the idiom I'd been using for creating shallow copies, namely the Board.__new__(Board) below. shedskin compiles it ok, but the C++ won't compile complaning about not being able to find __init__ methods Producing these warnings *WARNING* rush_hour_solver_cut_down.py:71: class 'Vehicle' has no method '__new__' *WARNING* rush_hour_solver_cut_down.py:72: variable 'new' has no type *WARNING* rush_hour_solver_cut_down.py:236: variable 'new_vehicle' has no type And these compile errors rush_hour_solver_cut_down.cpp:94: error: ‘__new__’ is not a member of ‘__rush_hour_solver_cut_down__::Vehicle’ rush_hour_solver_cut_down.cpp:95: error: expected type-specifier before ‘;’ token rush_hour_solver_cut_down.cpp: In member function ‘void* __rush_hour_solver_cut_down__::Board::move(int, int)’: rush_hour_solver_cut_down.cpp:276: error: ‘void*’ is not a pointer-to-object type rush_hour_solver_cut_down.cpp:276: error: ‘void*’ is not a pointer-to-object type rush_hour_solver_cut_down.cpp:279: error: ‘void*’ is not a pointer-to-object type rush_hour_solver_cut_down.cpp:279: error: ‘void*’ is not a pointer-to-object type rush_hour_solver_cut_down.cpp:281: error: invalid conversion from ‘void*’ to ‘__rush_hour_solver_cut_down__::Vehicle*’ def copy(self): new = Board.__new__(Board) new.me_x = self.me_x new.me_y = self.me_y new.depth = self.depth new.parent = self new.best_child = None new.board = [self.board[i][:] for i in range(WIDTH)] new.rep = self.rep[:] new.vehicles = self.vehicles[:] return new I changed to using copy.copy which did work, but I couldn't name my copy methods copy otherwise I got this error from the C++ compile rush_hour_solver_cut_down.cpp: In member function '__rush_hour_solver_cut_down__::Vehicle* __rush_hour_solver_cut_down__::Vehicle::copy()': rush_hour_solver_cut_down.cpp:94: error: no matching function for call to '__rush_hour_solver_cut_down__::Vehicle::copy(__rush_hour_solver_cut_down__::Vehicle* const)' rush_hour_solver_cut_down.cpp:89: note: candidates are: __rush_hour_solver_cut_down__::Vehicle* __rush_hour_solver_cut_down__::Vehicle::copy() rush_hour_solver_cut_down.cpp: In member function '__rush_hour_solver_cut_down__::Board* __rush_hour_solver_cut_down__::Board::copy()': rush_hour_solver_cut_down.cpp:135: error: no matching function for call to '__rush_hour_solver_cut_down__::Board::copy(__rush_hour_solver_cut_down__::Board* const)' rush_hour_solver_cut_down.cpp:129: note: candidates are: __rush_hour_solver_cut_down__::Board* __rush_hour_solver_cut_down__::Board::copy() So I renamed them to pycopy, and they ended up looking like def pycopy(self): new = copy(self) new.parent = self new.best_child = None new.board = [self.board[i][:] for i in range(WIDTH)] new.rep = self.rep[:] new.vehicles = self.vehicles[:] return new After all that - some timing results! Python: 9.3 seconds Psyco:5.8 seconds ShedSkin: 1.0 seconds Impressive! I put the code http://www.craig-wood.com/nick/pub/rush_hour_solver_cut_down.py I left in the commented out bits of code I had to change. This is only part of the project (375 lines) - it solves Rush Hour boards. There is another part which I haven't attempted to compile yet which finds the most difficult possible boards using a combination of back tracking and a genetic algorithm. -- Nick Craig-Wood n...@craig-wood.com -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
sqlite3 performance problems only in python
hello, until now I used only small / simple databases in Python with sqlite3. Now I've a large and rather complex database. The most simple query (with just a result of 100 rows), takes about 70 seconds. And all that time is consumed in cursor.fetchall Using the same database in Delphi, using the same query, takes less than 5 seconds (including displaying the full table in a grid). Are there in Python faster ways to get the query results ? Would it be faster if I used an ODBC coupling and PyODBC to interface the database ? thanks, Stef Mientki -- http://mail.python.org/mailman/listinfo/python-list
Re: challenging problem for changing to a dedicated non-privileged user within a script.
Krishnakant schrieb: On Thu, 2009-07-23 at 00:17 +0200, Piet van Oostrum wrote: Being a sudoer is not a privilege to issue the os.setuid system call. It is only a permission to use the sudo command. Yes, So I would like to know if python can change the user to some other non-privileged user during the script execution? If the user running python program is allowed to call setuid() then yes. K I tryed using subprocess but that did not help me either. I tryed sudo K su into the Popen command but it throws me into the terminal (shell) K with postgres as the user. You could execute the command: sudo -u postgres required_command with subprocess. Ok, but the problem is much more complex. No. What if I want to do the following. 1, change the user for a particular script to the postgres user. Did you try running sudo -u postgres blabla with subprocess? 2. now execute the python code for connecting to the postgresql database. In the second point I actually want to execute python code not shell level command so will the sudo -u in the subprocess.Popen change the user in the script? No, as the name subprocess suggests you are spawning a new process which gets another uid through sudo. This does not affect the parent process. hth Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: raster (PIL)
superpollo wrote: hi. i wrote a program which transforms a string of zeroes ando ones into a png file. #!/usr/bin/env python import Image import sys bits_in_a_byte = 8 raster_string = \ 0010010000101000 00100100101010100100 00001110001010100100 00100100101010100100 0010010000000000 0010 10101001 1010 10101000 00001000 raster_lines = raster_string.splitlines() high = len(raster_lines) wide = len(raster_lines[0]) bytes_in_a_row = wide/bits_in_a_byte This will give you the wrong result if not divideable by bits_in_a_byte. bitmap = for raster_line in raster_lines: for byte_count in range(bytes_in_a_row): first_bit = byte_count*bits_in_a_byte bitmap += chr(int(raster_line[first_bit:first_bit+bits_in_a_byte] , 2)) im = Image.fromstring(1, (wide , high) , bitmap) im.save(sys.stdout , PNG) any suggestions for improvement? Instead of res = for ...: res += ... use res = [] for ...: res.append(...) .join(res) There are some optimizations for the +=-op on strings, but I'm not sure how far they go, and the other form is safer. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Copy/paste through LAN
Jun junh...@gmail.com (J) wrote: J Hello, J I've a client/server application which uses Pyro to communicate each J other. J Now i try to implement copy/paste through LAN between server J controlled J filesystem to my local windows machine (I could list files in client's J window). J How can i pass the url information through Pyro ? What do you mean? Do you want to copy a file or copy file names? Copying a file between two machines can best be done by a specialized protocol, like HTTP or scp. Pasting a file doesn't make sense IMHO. And URLs are just strings. -- Piet van Oostrum p...@cs.uu.nl URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
Re: challenging problem for changing to a dedicated non-privileged user within a script.
Krishnakant hackin...@gmail.com (K) wrote: K On Thu, 2009-07-23 at 00:17 +0200, Piet van Oostrum wrote: Being a sudoer is not a privilege to issue the os.setuid system call. It is only a permission to use the sudo command. K Yes, So I would like to know if python can change the user to some other K non-privileged user during the script execution? As I said you can't (unless you are root). It would be a security leak if an arbitrary user could suddenly run as another user. Sudo is the escape mechanism but it runs commands, and is not for changing the uid in the middle of a process. K I tryed using subprocess but that did not help me either. I tryed sudo K su into the Popen command but it throws me into the terminal (shell) K with postgres as the user. You could execute the command: sudo -u postgres required_command with subprocess. K Ok, but the problem is much more complex. K What if I want to do the following. K 1, change the user for a particular script to the postgres user. K 2. now execute the python code for connecting to the postgresql K database. K In the second point I actually want to execute python code not shell K level command so will the sudo -u in the subprocess.Popen change the K user in the script? You can run another python script as the other user (o even the same python script). You said you tried subprocess. If that is acceptable then running another python script should also be acceptable, becaus eit is basically the same. K In short I would just like to have the script run under another user K let's say postgres as long as a certain action is going on, for example K connecting to the postgresql database. Why would you have to be another user for connecting to a postgres database? The DBMS takes care of the permissions at the DB level. Otherwise you would have to do the DB access in another script. The script could even communicate withe the original script, e.g by pipes or some protocol like XMLRPC. -- Piet van Oostrum p...@cs.uu.nl URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
Re: challenging problem for changing to a dedicated non-privileged user within a script.
On Thu, 2009-07-23 at 13:50 +0200, paul wrote: If the user running python program is allowed to call setuid() then yes. NO, i don't think i can do that. I am getting opperation not permitted. Any ways I think probably subprocess will have to sort it out. Did you try running sudo -u postgres blabla with subprocess? Yes, but still not got the intended result which is now obvious. 2. now execute the python code for connecting to the postgresql database. In the second point I actually want to execute python code not shell level command so will the sudo -u in the subprocess.Popen change the user in the script? No, as the name subprocess suggests you are spawning a new process which gets another uid through sudo. This does not affect the parent process. Ok then here is the work-around which I am thinking to try, Plese tell me if it is correct. I will let that subprocess start python inthe background and execute the connecting code to postgresql including importing the pygresql library. Then I will create the connection and cursor objcts in that subprocess. But my concern is, will the connection object in the child process (subprocess) be available to the parrent process? happy hacking. Krishnakant. -- http://mail.python.org/mailman/listinfo/python-list
Re: how two join and arrange two files together
On Thu, 23 Jul 2009 12:52:15 +0530, amr...@iisermohali.ac.in wrote: Hi, I have two large files: FileA 15 ALA H = 8.05 N = 119.31 CA = 52.18 HA = 4.52 C = 21 ALA H = 7.66 N = 123.58 CA = 54.33 HA = C = 179.35 23 ALA H = 8.78 N = CA = HA = C = 179.93. and FileB 21 ALA helix (helix_alpha, helix2) 23 ALA helix (helix_alpha, helix3) 38 ALA helix (helix_alpha, helix3)... now what i want that i will make another file in which i will join the two file in such a way that only matching entries will come like here 21 and 23 ALA is in both files, so the output will be something like:- 21 ALA H = 7.66 N = 123.58 CA = 54.33 HA = C = 179.35| 21 ALA helix (helix_alpha, helix2) 23 ALA H = 8.78 N = CA = HA = C = 179.93|23 ALA helix (helix_alpha, helix3) and further i will make another file in which i will be able to put those lines form this file based on the missing atom value, like for 21 ALA HA is not defined so i will put it another file based on its HA missing value similarly i will put 23 ALA on another file based on its missing N,CA and HA value. I tried to join the two file based on their matching entries by:--- (snip) I believe there are packages available for doing such things mostly written in perl. But if the aim is not to develop suitable applications but only to obtain the desired formatted file then doing this with the help of something like Excel would be easiest. This is my opinion from the experience I have from my bioinfo programming. Regards, Jyoti -- http://mail.python.org/mailman/listinfo/python-list
Looking for os.listdir() generator
Hello, I'm looking for a generator version of os.listdir() for Python 2.5 and newer. I know somebody has worked on it because I've seen a generator version in a posting on some list or blog a while ago. I can't find it anymore. It seems my Google fu is lacking today. All I can find is a very old version of xlistdir. A Cython based solution is appreciated but please no ctypes version. Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: sqlite3 performance problems only in python
until now I used only small / simple databases in Python with sqlite3. Now I've a large and rather complex database. The most simple query (with just a result of 100 rows), takes about 70 seconds. And all that time is consumed in cursor.fetchall Using the same database in Delphi, using the same query, takes less than 5 seconds (including displaying the full table in a grid). While it may seem obvious, are you doing anything time-consuming with those results? Or have you tested just doing the fetchall() without doing any further processing? I'm curious on the timing of sql = ... start = time() cursor.execute(sql) rows = cursor.fetchall() end = time() print end-start with no other processing. I regularly write sql that's fairly complex and brings back somewhat large datasets (sometimes in sqlite), and have never experienced problems with simple quer[ies] (with just a result of 100 rows taking such extrordinary times The answer from the above code will help determine whether it's the sqlite portion that's crazy (and might need some well-placed index statements; though if your Delphi code is fine, I suspect not), or if it's your application code that goes off into left field with the resulting data. -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: raster (PIL)
superpollo wrote: i wrote a program which transforms a string of zeroes ando ones into a png file. #!/usr/bin/env python import Image import sys bits_in_a_byte = 8 raster_string = \ 0010010000101000 00100100101010100100 00001110001010100100 00100100101010100100 0010010000000000 0010 10101001 1010 10101000 00001000 raster_lines = raster_string.splitlines() high = len(raster_lines) wide = len(raster_lines[0]) bytes_in_a_row = wide/bits_in_a_byte bitmap = for raster_line in raster_lines: for byte_count in range(bytes_in_a_row): first_bit = byte_count*bits_in_a_byte bitmap += chr(int(raster_line[first_bit:first_bit+bits_in_a_byte] , 2)) im = Image.fromstring(1, (wide , high) , bitmap) im.save(sys.stdout , PNG) any suggestions for improvement? You can simplify the inner loop: for first_bit in range(0, wide, bits_in_a_byte): bitmap += ... and get rid of a few helper variables. Here's a different approach: #!/usr/bin/env python import Image import string import sys mapping = string.maketrans(01, \x00\xff) raster_string = ... width = raster_string.index(\n) height = raster_string.count(\n) raster_string = raster_string.translate(mapping, \n) im = Image.fromstring(L, (width, height), raster_string) im.convert(1).save(sys.stdout, PNG) The idea is to move the bit-twiddling from python to code written in C, pointless for such a tiny picture but crucial for the performance when you want to manipulate larger images. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: raster (PIL)
Diez B. Roggisch wrote: superpollo wrote: ... high = len(raster_lines) wide = len(raster_lines[0]) bytes_in_a_row = wide/bits_in_a_byte This will give you the wrong result if not divideable by bits_in_a_byte. then maybe: #!/usr/bin/env python import Image import sys bits_in_a_byte = 8 raster_string = \ 00 0010010000101000 00100100101010100100 00001110001010100100 00100100101010100100 0010010000000000 0010 10101001 1010 10101000 00001000 raster_lines = raster_string.splitlines() high = len(raster_lines) wide = len(raster_lines[0]) bytes_in_a_row = wide/bits_in_a_byte wide_for_real = bytes_in_a_row*bits_in_a_byte if wide_for_real: bitmap = for raster_line in raster_lines: for byte_count in range(bytes_in_a_row): first_bit = byte_count*bits_in_a_byte bitmap += chr(int(raster_line[first_bit:first_bit+bits_in_a_byte] , 2)) im = Image.fromstring(1, (wide_for_real , high) , bitmap) im.save(sys.stdout , PNG) bye -- http://mail.python.org/mailman/listinfo/python-list
Re: python function for retrieving key and encryption
jayshree jayshree06c...@gmail.com (j) wrote: j On Jul 21, 8:59 pm, Piet van Oostrum p...@cs.uu.nl wrote: The recipient_public_key.pem file is the public key of the recipient which means the person that is going to receive the encrypted message. You should get it from the recipient him/herself or from some key store where s/he has deposited it. [...] j error coming like - IOError: [Errno 2] No such file or directory: j 'recipient_public_key.pem' j Is this not the inbuilt file. j How should i create such type of file. You don't create it. See above. If you understand what is is you know why it can't be builtin. If you don't understand it is better if you first learn about OpenSSL, otherwise you run the risk to make serious errors. If you are just experimenting to create a message for yourself then you have to create the public key because you are then the recipient yourself. That has been answered on http://stackoverflow.com/questions/1169798/m2crypto-package -- Piet van Oostrum p...@cs.uu.nl URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
Re: raster (PIL)
Peter Otten wrote: superpollo wrote: i wrote a program which transforms a string of zeroes ando ones into a png file. ... any suggestions for improvement? ... Here's a different approach: ... The idea is to move the bit-twiddling from python to code written in C, pointless for such a tiny picture but crucial for the performance when you want to manipulate larger images. very very interesting... you know i come from a lower level language approach (C/Pascal) so i find it difficult (but full of fascination) to adapt to such a different and much simpler way of thinking. anyways, thanks a lot. bye -- http://mail.python.org/mailman/listinfo/python-list
Re: sqlite3 performance problems only in python
Tim Chase wrote: until now I used only small / simple databases in Python with sqlite3. Now I've a large and rather complex database. The most simple query (with just a result of 100 rows), takes about 70 seconds. And all that time is consumed in cursor.fetchall Using the same database in Delphi, using the same query, takes less than 5 seconds (including displaying the full table in a grid). While it may seem obvious, are you doing anything time-consuming with those results? Or have you tested just doing the fetchall() without doing any further processing? I'm curious on the timing of sql = ... start = time() cursor.execute(sql) rows = cursor.fetchall() end = time() print end-start No this is exactly what I did, I timed the execute and fetchall seperatly: execute: 125 msec fetchall: 71000 msec (returning 100 rows and 25 columns) pysqlite: version 2.3.2 btw, I don't know if it's of any importance, the SQL-statement I perform is select OPNAMEN.*, NAME, NAME_, SCORES.SCORE, PATIENT.* from OPNAMEN inner join POID_VLID on OPNAMEN.POID= POID_VLID.POID inner join VRAAGLST on VRAAGLST.VLID = POID_VLID.VLID inner join VLID_SSID on VRAAGLST.VLID = VLID_SSID.VLID inner join SUBSCHAAL_GEGEVENS on SUBSCHAAL_GEGEVENS.SSID = VLID_SSID.SSID inner join POID_SSID_SCID on ( OPNAMEN.POID= POID_SSID_SCID.POID ) and ( SUBSCHAAL_GEGEVENS.SSID = POID_SSID_SCID.SSID ) inner join SCORES on SCORES.SCID = POID_SSID_SCID.SCID inner join PID_POID on OPNAMEN.POID= PID_POID.POID inner join PATIENTon PATIENT.PID = PID_POID.PID where substr ( lower( NAME) , 1, 6) = 'cis20r' and lower ( NAME_ ) = 'fatigue' and TEST_COUNT in (3,4) and DATETIME 39814.0 and SCORE 30 cheers, Stef with no other processing. I regularly write sql that's fairly complex and brings back somewhat large datasets (sometimes in sqlite), and have never experienced problems with simple quer[ies] (with just a result of 100 rows taking such extrordinary times The answer from the above code will help determine whether it's the sqlite portion that's crazy (and might need some well-placed index statements; though if your Delphi code is fine, I suspect not), or if it's your application code that goes off into left field with the resulting data. -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: Pyserial and pyQt
On Tue, Jul 21, 2009 at 9:37 PM, Seth king.s...@gmail.com wrote: I have used pyserial in the past but this is my first experience with pyQt. I am using the Python xy package for windows current but might move to linux. I have a small device that is outputting a basic text string. I want to be able to read this string(from the comm port) and update a text box and eventually a graph in pyQt. I can't find any documentation or tutorials on how to do this. If anyone can point me in the right direction or give me some tips I would be grateful. As I need to do something similar I looked around and found the following recipe at activestate: http://code.activestate.com/recipes/82965/ In the comments there is an example for PyQt. Cheers, Robert -- http://mail.python.org/mailman/listinfo/python-list
Re: raster (PIL)
Peter Otten wrote: ... Here's a different approach: ... raster_string = ... width = raster_string.index(\n) height = raster_string.count(\n) your approach has a funny side-effect: try to remove just one zero from the first line of the raster ;-) bye -- http://mail.python.org/mailman/listinfo/python-list
Re: raster (PIL)
Peter Otten wrote: ... im.convert(1).save(sys.stdout, PNG) ... a q about pil: im.convert(1) is different from: im2 = im.convert(1) right? in the former im is changed (the method applies to im) but in the latter im is unchanged (first im is copied unto im2 and then the method is applied to im2)... am i right? bye -- http://mail.python.org/mailman/listinfo/python-list
Re: Detect target name in descriptor __set__ method
On Jul 22, 6:05 pm, Gabriel Genellina gagsl-...@yahoo.com.ar
wrote:
En Wed, 22 Jul 2009 11:01:09 -0300, Rhodri James
rho...@wildebst.demon.co.uk escribió:
On Wed, 22 Jul 2009 06:02:55 +0100, Gabriel Genellina
gagsl-...@yahoo.com.ar wrote:
class X(object):
foo = descriptor()
x = X()
x.foo = value
Isn't this going to create a brand new instance attribute x.foo that has
nothing to do with the descriptor anyway?
No, it's up to the descriptor __set__ method what happens in this case.
Think of the standard 'property' descriptor, the fset function can do
whatever it wants.
Also, a data descriptor takes precedence over any instance attribute of
the same name that might exist.
--
Gabriel Genellin
You might've already thought of this (and it is annoying), but you
could pass the name through the descriptor's init method. I believe
this is the only way besides assigning a metaclass that will look for
that type of descriptor upon class creation and set the descriptor's
name at that time.
class A(object):
def __init__(self, attr_name):
self._name = attr_name
def __set__(self, instance, value):
self.instance.__dict__[self._name] = value
# or something like that...
class B(object):
foo = A('foo')
--
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Re: regex: multiple matching for one string
scriptlear...@gmail.com wrote:
For example, I have a string #a=valuea;b=valueb;c=valuec;, and I
will like to take out the values (valuea, valueb, and valuec). How do
I do that in Python? The group method will only return the matched
part. Thanks.
p = re.compile('#a=*;b=*;c=*;')
m = p.match(line)
if m:
print m.group(),
IMHO a regex for this is overkill, a combination of string methods such
as split and find should suffice.
Regards.
--
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Re: raster (PIL)
superpollo wrote: Diez B. Roggisch wrote: superpollo wrote: ... high = len(raster_lines) wide = len(raster_lines[0]) bytes_in_a_row = wide/bits_in_a_byte This will give you the wrong result if not divideable by bits_in_a_byte. then maybe: #!/usr/bin/env python import Image import sys bits_in_a_byte = 8 raster_string = \ 00 0010010000101000 00100100101010100100 00001110001010100100 00100100101010100100 0010010000000000 0010 10101001 1010 10101000 00001000 raster_lines = raster_string.splitlines() high = len(raster_lines) wide = len(raster_lines[0]) bytes_in_a_row = wide/bits_in_a_byte wide_for_real = bytes_in_a_row*bits_in_a_byte No. Because that would skip up to 7 bits. Instead, do bytes_in_a_row = wide/bits_in_a_byte if wide % bits_in_a_byte: bytes_in_a_row += 1 Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Predefined Variables
Fred Atkinson wrote: Is there a pre-defined variable that returns the GET line (http://www.php.net/index.php?everythingafterthequestionmark) as a single variable (rather than individual variables)? Variables don't return things. Functions do. And additionally the answer depends on what and with what you actually do. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: challenging problem for changing to a dedicated non-privileged user within a script.
Krishnakant schrieb:
On Thu, 2009-07-23 at 13:50 +0200, paul wrote:
If the user running python program is allowed to call setuid() then yes.
NO, i don't think i can do that. I am getting opperation not permitted.
Any ways I think probably subprocess will have to sort it out.
Did you try running sudo -u postgres blabla with subprocess?
Yes, but still not got the intended result which is now obvious.
Why is that obvious? Works for me:
test.py -
#!/usr/bin/python
from subprocess import Popen, PIPE
cmd = Popen('sudo -u vboxadd /home/pkoelle/Documents/whoami.sh',
shell=True, stdout=PIPE, stderr=PIPE)
print OUT: +cmd.stdout.read()
print ERR: +cmd.stderr.read()
whoami.sh -
#!/bin/bash
echo $UID
logger whoami script called for $UID
Of course, you need to adapt path and user values to your situation. The
user you use in your 'sudo -u user...' call needs execute permissions
for whoami.sh. The relevant entry in /etc/sudoers:
pkoelle ALL=NOPASSWD: /home/pkoelle/Documents/whoami.sh
hth
Paul
PS: This has absolutely nothing to do with connecting to postgresql. A
postgres user is not a system user (Piet already asked the right
questions here ;)
2. now execute the python code for connecting to the postgresql
database.
In the second point I actually want to execute python code not shell
level command so will the sudo -u in the subprocess.Popen change the
user in the script?
No, as the name subprocess suggests you are spawning a new process
which gets another uid through sudo. This does not affect the parent
process.
Ok then here is the work-around which I am thinking to try, Plese tell
me if it is correct.
I will let that subprocess start python inthe background and execute the
connecting code to postgresql including importing the pygresql library.
Then I will create the connection and cursor objcts in that subprocess.
But my concern is, will the connection object in the child process
(subprocess) be available to the parrent process?
happy hacking.
Krishnakant.
--
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Re: raster (PIL)
superpollo wrote: Peter Otten wrote: ... im.convert(1).save(sys.stdout, PNG) ... a q about pil: im.convert(1) is different from: im2 = im.convert(1) right? in the former im is changed (the method applies to im) but in the latter im is unchanged (first im is copied unto im2 and then the method is applied to im2)... am i right? No. A method has no clue whether its result is used or discarded. Therefore im.convert(1) creates a new image in the specified mode, too, which is discarded immediately. If you don't need the result you probably shouldn't call the method at all. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: raster (PIL)
Peter Otten wrote: superpollo wrote: Peter Otten wrote: ... im.convert(1).save(sys.stdout, PNG) ... a q about pil: im.convert(1) is different from: im2 = im.convert(1) right? in the former im is changed (the method applies to im) but in the latter im is unchanged (first im is copied unto im2 and then the method is applied to im2)... am i right? No. A method has no clue whether its result is used or discarded. Therefore im.convert(1) creates a new image in the specified mode, too, which is discarded immediately. but in: im.convert(1).save(sys.stdout, PNG) the new (anonymous) image created by .convert is not discarded *immediately*, i mean *before* the .save method is called on it, right? bye -- http://mail.python.org/mailman/listinfo/python-list
Re: JavaScript toolkits (was Re: ANN: Porcupine Web Application Server 0.6 is released!)
On 23 Jul, 05:55, a...@pythoncraft.com (Aahz) wrote: In article 1c994086-8c58-488f-b3b3-6161c4b2b...@k30g2000yqf.googlegroups.com, Paul Boddie p...@boddie.org.uk wrote: http://www.boddie.org.uk/python/XSLTools.html Thanks! I'll take a look after OSCON. The JavaScript parts of the framework are a bit complicated, I'll admit: you have to write some nasty-looking function calls with awkward arguments to send AJAX-style requests to the server. I've been meaning to employ a more declarative signals and slots approach so that you don't have to write in the page templates where the in-page updates should be expected: it's really the server code that determines this kind of thing, and so the server code should be able to say where it wants the page to be updated. Again, I'll try and put up some examples in the relatively near future that will make it easier for you to see if it's your kind of thing. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: raster (PIL)
superpollo wrote: Peter Otten wrote: superpollo wrote: Peter Otten wrote: ... im.convert(1).save(sys.stdout, PNG) ... a q about pil: im.convert(1) is different from: im2 = im.convert(1) right? in the former im is changed (the method applies to im) but in the latter im is unchanged (first im is copied unto im2 and then the method is applied to im2)... am i right? No. A method has no clue whether its result is used or discarded. Therefore im.convert(1) creates a new image in the specified mode, too, which is discarded immediately. but in: im.convert(1).save(sys.stdout, PNG) the new (anonymous) image created by .convert is not discarded *immediately*, i mean *before* the .save method is called on it, right? Of course. Think of it as a shortcut for tmp = im.convert(...) tmp.save(...) del tmp Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: how two join and arrange two files together
I tried to print those lines having C value missing by: import re expr = re.compile(C = None) f = open(/home/amrita/helix.dat) for line in f: if expr.search(line): print line but it is not giving any value. Hi, I have two large files: FileA 15 ALA H = 8.05 N = 119.31 CA = 52.18 HA = 4.52 C = 21 ALA H = 7.66 N = 123.58 CA = 54.33 HA = C = 179.35 23 ALA H = 8.78 N = CA = HA = C = 179.93. and FileB 21 ALA helix (helix_alpha, helix2) 23 ALA helix (helix_alpha, helix3) 38 ALA helix (helix_alpha, helix3)... now what i want that i will make another file in which i will join the two file in such a way that only matching entries will come like here 21 and 23 ALA is in both files, so the output will be something like:- 21 ALA H = 7.66 N = 123.58 CA = 54.33 HA = C = 179.35| 21 ALA helix (helix_alpha, helix2) 23 ALA H = 8.78 N = CA = HA = C = 179.93|23 ALA helix (helix_alpha, helix3) and further i will make another file in which i will be able to put those lines form this file based on the missing atom value, like for 21 ALA HA is not defined so i will put it another file based on its HA missing value similarly i will put 23 ALA on another file based on its missing N,CA and HA value. I tried to join the two file based on their matching entries by:--- from collections import defaultdict if __name__ == __main__: ... a = open(/home/amrita/alachems/chem100.txt) ... c = open(/home/amrita/secstr/secstr100.txt) ... def source(stream): ... return (line.strip() for line in stream) ... ... def merge(sources): ... for m in merge([source(a),source(c)]): ... print |.join(c.ljust(10) for c in m) ... but it is not giving any value. Thanks, Amrita Kumari Research Fellow IISER Mohali Chandigarh INDIA Amrita Kumari Research Fellow IISER Mohali Chandigarh INDIA -- http://mail.python.org/mailman/listinfo/python-list
Re: Detect target name in descriptor __set__ method
On Jul 23, 7:19 am, DG dang...@gmail.com wrote:
On Jul 22, 6:05 pm, Gabriel Genellina gagsl-...@yahoo.com.ar
wrote:
En Wed, 22 Jul 2009 11:01:09 -0300, Rhodri James
rho...@wildebst.demon.co.uk escribió:
On Wed, 22 Jul 2009 06:02:55 +0100, Gabriel Genellina
gagsl-...@yahoo.com.ar wrote:
class X(object):
foo = descriptor()
x = X()
x.foo = value
Isn't this going to create a brand new instance attribute x.foo that has
nothing to do with the descriptor anyway?
No, it's up to the descriptor __set__ method what happens in this case.
Think of the standard 'property' descriptor, the fset function can do
whatever it wants.
Also, a data descriptor takes precedence over any instance attribute of
the same name that might exist.
--
Gabriel Genellin
You might've already thought of this (and it is annoying), but you
could pass the name through the descriptor's init method. I believe
this is the only way besides assigning a metaclass that will look for
that type of descriptor upon class creation and set the descriptor's
name at that time.
class A(object):
def __init__(self, attr_name):
self._name = attr_name
def __set__(self, instance, value):
self.instance.__dict__[self._name] = value
# or something like that...
class B(object):
foo = A('foo')
Well of course I think of more alternatives after I post.
1) still annoying... pass the class through a 'registering' function
that will examine all of it's attrs and find the ones that are of your
descriptor type, and assign the attr_name upon that descriptor.name
attribute.
2) I just thought of, and it's kind of a hack is to do this
examination within the '__set__' method.
e.g.
class A(object):
def __get__(self, instance, owner):
if instance is None:
return self
else:
# do something different here for instances' access
return self
def __set__(self, instance, value):
cls = instance.__class__
name = None
for attr in dir(cls):
if getattr(cls, attr) is self:
name = attr
print name
--
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Re: Detect target name in descriptor __set__ method
On Thu, 23 Jul 2009 01:05:55 +0100, Gabriel Genellina gagsl-...@yahoo.com.ar wrote: En Wed, 22 Jul 2009 11:01:09 -0300, Rhodri James rho...@wildebst.demon.co.uk escribió: On Wed, 22 Jul 2009 06:02:55 +0100, Gabriel Genellina gagsl-...@yahoo.com.ar wrote: class X(object): foo = descriptor() x = X() x.foo = value Isn't this going to create a brand new instance attribute x.foo that has nothing to do with the descriptor anyway? No, it's up to the descriptor __set__ method what happens in this case. Think of the standard 'property' descriptor, the fset function can do whatever it wants. If it gets called, that is. Also, a data descriptor takes precedence over any instance attribute of the same name that might exist. This was the bit I wasn't clear on. Thanks! -- Rhodri James *-* Wildebeest Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
import vs imp and friends.
Greetings,
I was looking in the archive of this newsgroup and I found this
snippet:
import imp
sourcecode = 'def foo(x): return 11*x'
mod = imp.new_module('foo')
exec sourcecode in mod.__dict__
mod.foo(16)
Together with similar and sometimes more complete snippets available
they show how a module can be created out of string, plain text files
and compiled files. Neat!
Now the question. Apart from checking sys.module first and eventually
adding the new module to it if it isn't there already, and apart from
setting __file__, is there anything else that import does and this
snippet doesn't?
Manu
--
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Re: ANN: psyco V2
It seems psyco.org is still in the transfer process... Is there any charitable soul with a link to a Windows binary? :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: import vs imp and friends.
Emanuele D'Arrigo wrote: Now the question. Apart from checking sys.module first and eventually adding the new module to it if it isn't there already, and apart from setting __file__, is there anything else that import does and this snippet doesn't? The import statement does several things. For instance it holds the import lock to stop other threads from importing the same module again. It also does lots of additional work for packages like relative imports, checking __path__, setting attributes on parent packages and so on. The import system also does a lot of work in order to find and load a module, too. Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: Detect target name in descriptor __set__ method
Gabriel Genellina schrieb:
I have a class attribute 'foo' which is a data descriptor. I create an
instance of such class. When I say instance.foo = value, the descriptor
__set__ method is called. Is there any way to obtain the name being
assigned to? ('foo' in this example). That is, I want to know the target
name for the assignment that triggered the __set__ method call.
class descriptor(object):
def __get__(self, instance, owner):
return self
def __set__(self, instance, value):
# I want to know the *name* this value is being assigned to
for name in instance.__class__.__dict__:
if getattr(instance, name) is self:
print assigning to %s % name
break
class X(object):
foo = descriptor()
bar = descriptor()
class Y(object):
foo = descriptor()
baz = descriptor()
x = X()
y = Y()
x.foo = value
x.bar = value
y.foo = value
y.baz = value
Does this work for you?
Rainer
--
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Re: ANN: psyco V2
Neuruss wrote: It seems psyco.org is still in the transfer process... Is there any charitable soul with a link to a Windows binary? :-) It seems like Christian is already working on Windows binaries. We are having a discussing about an obscure MinGW bug on the Python developer list. It looks like MinGW isn't fully ABI compatible with MSVC. Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: psyco V2
Christian Tismer wrote: Psyco V2 will run on X86 based 32 bit Linux, 32 bit Windows, and Mac OS X. Psyco is not supporting 64 bit, yet. But it is well being considered. Can you estimate how much work needs to be done in order to get Psyco working on 64bit POSIX (Linux) systems? Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: regex: multiple matching for one string
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Agreed. Two string.split()s, first at the semi-colon and then at the
equal sign, will yield you your value, without having to fool around
with regexes.
On 7/23/2009 9:23 AM, Mark Lawrence wrote:
scriptlear...@gmail.com wrote:
For example, I have a string #a=valuea;b=valueb;c=valuec;, and I
will like to take out the values (valuea, valueb, and valuec). How do
I do that in Python? The group method will only return the matched
part. Thanks.
p = re.compile('#a=*;b=*;c=*;')
m = p.match(line)
if m:
print m.group(),
IMHO a regex for this is overkill, a combination of string methods such
as split and find should suffice.
Regards.
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Version: GnuPG v1.4.9 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
iEYEARECAAYFAkpogb0ACgkQLMI5fndAv9jtOwCgj3+YOLfKGvAdyCMOhh4NGgfy
x5YAn1ydhUYxGlvC4Z4WlWKaa1gwviSh
=jnp1
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Office COM automatisation - calling python from VBA
I'd like a copy of that code. Thanks for taking the time for all of us. Sincerely, Aaron Dushku ** Aaron Dushku GIS Specialist USDA-NRCS Amherst, Massachusetts (413) 253-4379 Email: aaron.dushku at ma.usda.gov -- http://mail.python.org/mailman/listinfo/python-list
win32clipboard operation
Hi all, Newbie question. I've written a script that outputs to a text file. Now, I just want to copy the content to win32clipboard for access to other applications. Here's the mess I've come up with so far:) import xlrd import win32clipboard def program_uno(): ofile = open(rC:\Query\DQL.txt, w) book = xlrd.open_workbook(C:\DocLoader\MCL_Drawing and Legacy Docloader Sheet.xls) sh = book.sheet_by_index(0) e = sh.cell_value(1, 0) a = sh.col_values(0, start_rowx=2, end_rowx=200) b = r'%' + e c = r'%Draft%' y = rsome text... %(b, c) w = rsome more text... ofile.writelines(y) for x in a: d = r'%' + x z = r loop text... %(d, c) f = ofile.writelines(z) ofile.writelines(w) def copy_text(): ifile = open(rC:\Query\DQL.txt, r) win32clipboard.OpenClipboard(0) win32clipboard.EmptyClipboard() win32clipboard.SetClipboardText() win32clipboard.CloseClipboard program_uno() copy_text() -- http://mail.python.org/mailman/listinfo/python-list
Re: What is file.encoding convention?
On Jul 23, 4:06 am, Naoki INADA songofaca...@gmail.com wrote: In document http://docs.python.org/library/ stdtypes.html#file.encoding: The encoding that this file uses. When Unicode strings are written to a file, they will be converted to byte strings using this encoding. In addition, when the file is connected to a terminal, the attribute gives the encoding that the terminal is likely to use But inlogging.StreamHandler.emit() :: try: if (isinstance(msg, unicode) and getattr(stream, 'encoding', None)): #fs = fs.decode(stream.encoding) try: stream.write(fs % msg) except UnicodeEncodeError: #Printing to terminals sometimes fails. For example, #with an encoding of 'cp1251', the above write will #work if written to a stream opened or wrapped by #the codecs module, but fail when writing to a #terminal even when the codepage is set to cp1251. #An extra encoding step seems to be needed. stream.write((fs % msg).encode (stream.encoding)) else: stream.write(fs % msg) except UnicodeError: stream.write(fs % msg.encode(UTF-8)) And behavior of sys.stdout in Windows:: import sys sys.stdout.encoding 'cp932' u = uあいう u u'\u3042\u3044\u3046' print sys.stdout, u あいう sys.stderr.write(u) Traceback (most recent call last): File stdin, line 1, in module UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-2: ordinal not in range(128) What is file.encoding convention? If I want to write a unicode string to a file(-like) that have encoding attribute, I should do (1) try: file.write(unicode_str), (2) except UnicodeEncodeError: file.write(unicode_str.encode (file.encoding)) likelogging? It seems agly. If you are writing a Unicode string to a stream which has been opened with e.g. codecs.open with a specific encoding, then the stream is actually a wrapper. You can write Unicode strings directly to it, and the wrapper stream will encode the Unicode to bytes using the specific encoding and write those bytes to the underlyting stream. In your example you didn't show sys.stderr.encoding - you showed sys.stdout.encoding and printed out something to it which seemed to give the correct result, but then wrote to sys.stderr which gave a UnicodeEncodeError. What is the encoding of sys.stderr in your example? Also note that logging had to handle what appeared to be an oddity with terminals - they (at least sometimes) have an encoding attribute but appear to expect to have bytes written to them, and not Unicode. Hence the logging kludge, which should not be needed and so has been carefully commented. Regards, Vinay Sajip -- http://mail.python.org/mailman/listinfo/python-list
Re: regex: multiple matching for one string
Mark Lawrence breamore...@yahoo.co.uk wrote in message
news:mailman.3588.1248355389.8015.python-l...@python.org...
scriptlear...@gmail.com wrote:
For example, I have a string #a=valuea;b=valueb;c=valuec;, and I
will like to take out the values (valuea, valueb, and valuec). How do
I do that in Python? The group method will only return the matched
part. Thanks.
p = re.compile('#a=*;b=*;c=*;')
m = p.match(line)
if m:
print m.group(),
IMHO a regex for this is overkill, a combination of string methods such as
split and find should suffice.
Regards.
For the OP, it can be done with regex by grouping:
p = re.compile(r'#a=(*);b=(*);c=(*);')
m = p.match(line)
if m:
print m.group(1),
m.group(1) has valuea in it, etc.
But this may not be the best way, but it is reasonably terse.
--
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extract c/cpp include file with regular expression
Hi all! I need to parse c/cpp source files, one requirement is to extract included header file name. here is my solution: p = re.compile(r'#\s*include\s+(?:()|())(.*)(?(1))(?(2))') m = re.search(p, '#include header.h') m.group(3) 'header.h' m = re.search(p, '#include header.h') m.group(3) 'header.h' m = re.search(p, '#include header.h') print(m) None m = re.search(p, '#include header.h') print(m) None Pretty ugly! And I know for a valid c/cpp source file, it will be not necessary to check and match '' with '' and with , but I'm wondering to see more elegant way to do such thing. tiefeng wu 2009-07-23 -- http://mail.python.org/mailman/listinfo/python-list
Cannot Get Form To Work
Hi:
When the form comes up the first time, there is the default value for num.
When I fill in a number in the form and press send, even though the form
sends to itself (same page name), I would think it would read the number
sent. Here again is the code:
from primeNumbers import primeNumbers
try:
lang = form.getfirst('lang', 'en')
browser = form.getfirst('browser', 'all')
site = form.getfirst('site', 'bridge')
num = form.getfirst('num','')
except:
pass
ourFile = string.split(__file__, /)
p = ourFile[len(ourFile) - 1]
p = p[: - 9]
site = ourFile[4][:-10]
if site != '':
site = site[:-1]
print Content-Type: text/html
print
print
!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Frameset//EN
http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd;
head xmlns=http://www.w3.org/1999/xhtml;
/head
if num != '':
num = round(float(num))
roots = primeNumbers(num)
print roots
if num == '':
print
form action=http://13gems.com/test-Calculators_frame.py; method=post
input type=text name=num size=20 maxlength=20 value=Enter number
here... onfocus=this.value='' /
input type=image src=http://13gems.com/images/search.jpg; name=search
id=search /
/form
print '/body/html\n'
--
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strange python scripting error
I have a very strange error. I have two test python files test.py and python.py which contain the following code #!/usr/bin/python print Content-type: text/html print print html print centerHello, Linux.com!/center print /html One file (test.py) works; you call it up and it shows a web page with Hello, Linux.com The other fails with a server configuration error. Both are running under Linux, same server, same permissions. Running a character scan shows that both files contain the same printable characters and are therefore typographically identical. They are absolutely the same. The only hint at a difference I can see is that my ftp program says the files are of unequal lengths. test.py is 129 bytes long. python.py 134 bytes long. A zipped folder containing both files is at www.lambdassociates.org/weird.zip Any ideas welcome. Mark -- http://mail.python.org/mailman/listinfo/python-list
Re: regex: multiple matching for one string
2009/7/23 scriptlear...@gmail.com scriptlear...@gmail.com:
For example, I have a string #a=valuea;b=valueb;c=valuec;, and I
will like to take out the values (valuea, valueb, and valuec). How do
I do that in Python? The group method will only return the matched
part. Thanks.
p = re.compile('#a=*;b=*;c=*;')
m = p.match(line)
if m:
print m.group(),
--
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maybe like this:
p = re.compile(r'#?\w+=(\w+);')
l = re.findall(p, '#a=valuea;b=valueb;c=valuec;')
for r in l: print(r)
...
valuea
valueb
valuec
tiefeng wu
2009-07-23
--
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Re: extract c/cpp include file with regular expression
On Jul 23, 2009, at 11:46 AM, tiefeng wu wrote: Hi all! I need to parse c/cpp source files, one requirement is to extract included header file name. here is my solution: p = re.compile(r'#\s*include\s+(?:()|())(.*)(?(1))(?(2))') m = re.search(p, '#include header.h') m.group(3) 'header.h' m = re.search(p, '#include header.h') m.group(3) 'header.h' m = re.search(p, '#include header.h') print(m) None m = re.search(p, '#include header.h') print(m) None Pretty ugly! And I know for a valid c/cpp source file, it will be not necessary to check and match '' with '' and with , but I'm wondering to see more elegant way to do such thing. Hi tiefeng, Regexes are always a little ugly IMO. =) A side note -- does your parser need to handle /* comments like this one*/? If so, then regular expressions are not going be sufficient. Good luck Philip -- http://mail.python.org/mailman/listinfo/python-list
Re: strange python scripting error
Mark Tarver wrote: I have a very strange error. I have two test python files test.py and python.py which contain the following code #!/usr/bin/python print Content-type: text/html print print html print centerHello, Linux.com!/center print /html One file (test.py) works; you call it up and it shows a web page with Hello, Linux.com The other fails with a server configuration error. Both are running under Linux, same server, same permissions. Running a character scan shows that both files contain the same printable characters and are therefore typographically identical. They are absolutely the same. The only hint at a difference I can see is that my ftp program says the files are of unequal lengths. test.py is 129 bytes long. python.py 134 bytes long. A zipped folder containing both files is at www.lambdassociates.org/weird.zip Any ideas welcome. They have different line-ending-conventions. Not sure if and why that makes a difference. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: win32clipboard operation
LeeRisq wrote: Hi all, Newbie question. I've written a script that outputs to a text file. Now, I just want to copy the content to win32clipboard for access to other applications. Here's the mess I've come up with so far:) [snip] def copy_text(): ifile = open(rC:\Query\DQL.txt, r) text = ifile.read() ifile.close() win32clipboard.OpenClipboard() win32clipboard.EmptyClipboard() win32clipboard.SetClipboardText(text) win32clipboard.CloseClipboard() -- http://mail.python.org/mailman/listinfo/python-list
Re: sqlite3 performance problems only in python
On Thu, Jul 23, 2009 at 9:02 AM, Stef Mientkistef.mien...@gmail.com wrote: btw, I don't know if it's of any importance, the SQL-statement I perform is select OPNAMEN.*, NAME, NAME_, SCORES.SCORE, PATIENT.* from OPNAMEN inner join POID_VLID on OPNAMEN.POID = POID_VLID.POID inner join VRAAGLST on VRAAGLST.VLID = POID_VLID.VLID inner join VLID_SSID on VRAAGLST.VLID = VLID_SSID.VLID inner join SUBSCHAAL_GEGEVENS on SUBSCHAAL_GEGEVENS.SSID = VLID_SSID.SSID inner join POID_SSID_SCID on ( OPNAMEN.POID = POID_SSID_SCID.POID ) and ( SUBSCHAAL_GEGEVENS.SSID = POID_SSID_SCID.SSID ) inner join SCORES on SCORES.SCID = POID_SSID_SCID.SCID inner join PID_POID on OPNAMEN.POID = PID_POID.POID inner join PATIENT on PATIENT.PID = PID_POID.PID where substr ( lower( NAME) , 1, 6) = 'cis20r' and lower ( NAME_ ) = 'fatigue' and TEST_COUNT in (3,4) and DATETIME 39814.0 and SCORE 30 Warning: I suck at SQL and hate it with a passion... By using lower() on the left side of the where expressions I believe that you are table scanning. So it is not the size of the data returned, but the size of the data that needs to be scanned. -- David blog: http://www.traceback.org twitter: http://twitter.com/dstanek -- http://mail.python.org/mailman/listinfo/python-list
Re: extract c/cpp include file with regular expression
tiefeng wu wrote:
Hi all!
I need to parse c/cpp source files, one requirement is to extract
included header file name.
here is my solution:
p = re.compile(r'#\s*include\s+(?:()|())(.*)(?(1))(?(2))')
m = re.search(p, '#include header.h')
m.group(3)
'header.h'
m = re.search(p, '#include header.h')
m.group(3)
'header.h'
m = re.search(p, '#include header.h')
print(m)
None
m = re.search(p, '#include header.h')
print(m)
None
Pretty ugly! And I know for a valid c/cpp source file, it will be not
necessary to check and match '' with '' and with ,
but I'm wondering to see more elegant way to do such thing.
I'd probably do:
p = re.compile(r'#\s*include\s+(?:([^]*)|([^]*))')
m = p.search('#include header.h')
m.group(1) or m.group(2)
'header.h'
--
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Re: strange python scripting error
Diez B. Roggisch de...@nospam.web.de wrote in message news:7crfjof29e4g...@mid.uni-berlin.de... They have different line-ending-conventions. Not sure if and why that makes a difference. Depends on your setup. Shells can be a bit dumb about it, so it will likely break simple cgi-style hosting. -bash: ./python.py: /usr/bin/python^M: bad interpreter: -- http://mail.python.org/mailman/listinfo/python-list
Re: strange python scripting error
Diez B. Roggisch wrote: Mark Tarver wrote: I have a very strange error. I have two test python files test.py and python.py which contain the following code #!/usr/bin/python print Content-type: text/html print print html print centerHello, Linux.com!/center print /html One file (test.py) works; you call it up and it shows a web page with Hello, Linux.com The other fails with a server configuration error. Both are running under Linux, same server, same permissions. Running a character scan shows that both files contain the same printable characters and are therefore typographically identical. They are absolutely the same. The only hint at a difference I can see is that my ftp program says the files are of unequal lengths. test.py is 129 bytes long. python.py 134 bytes long. A zipped folder containing both files is at www.lambdassociates.org/weird.zip Any ideas welcome. They have different line-ending-conventions. Not sure if and why that makes a difference. Looks like the shell treats the CR as part of the interpreter name: $ cat python.py #!/usr/bin/python print Content-type: text/html print print html print centerHello, Linux.com!/center print /html$ $ python python.py Content-type: text/html html centerHello, Linux.com!/center /html $ chmod u+x python.py $ ./python.py bash: ./python.py: /usr/bin/python^M: bad interpreter: No such file or directory Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: extract c/cpp include file with regular expression
MRAB wrote:
I'd probably do:
p = re.compile(r'#\s*include\s+(?:([^]*)|([^]*))')
m = p.search('#include header.h')
m.group(1) or m.group(2)
'header.h'
yes, it's easier to understand.
thanks, MRAB!
I always make things complicated :P
tiefeng wu
2009-07-23
--
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Re: Detect target name in descriptor __set__ method
On Jul 23, 8:44 am, Rainer Mansfeld mli...@romulo.de wrote:
Gabriel Genellina schrieb:
I have a class attribute 'foo' which is a data descriptor. I create an
instance of such class. When I say instance.foo = value, the descriptor
__set__ method is called. Is there any way to obtain the name being
assigned to? ('foo' in this example). That is, I want to know the target
name for the assignment that triggered the __set__ method call.
class descriptor(object):
def __get__(self, instance, owner):
return self
def __set__(self, instance, value):
# I want to know the *name* this value is being assigned to
for name in instance.__class__.__dict__:
if getattr(instance, name) is self:
print assigning to %s % name
break
class X(object):
foo = descriptor()
bar = descriptor()
class Y(object):
foo = descriptor()
baz = descriptor()
x = X()
y = Y()
x.foo = value
x.bar = value
y.foo = value
y.baz = value
Does this work for you?
Rainer
The reason I wasn't checking the class' '__dict__' attribute in my
solution was because this won't show any descriptors that were
inherited from base classes. Example with some optimizations below
(sorry for the long code):
builtin_methods = dir(object)
class descriptor(object):
def __init__(self):
self.name = None
def __get__(self, instance, owner):
# if you want a 'useful' data descriptor only return self upon
# non-instance access
if instance is None:
return self
else:
# do something besides the below for the usefulness
return self
def __set__(self, instance, value):
if self.name is None:
cls = instance.__class__
dir_attrs = [m for m in dir(cls) if m not in
builtin_methods]
# 'foo' is printed here
print 'dir(cls):', dir_attrs
# 'foo' is not printed here
print 'cls.__dict__:', cls.__dict__
for name in dir_attrs:
if getattr(cls, name) is self:
self.name = name
print setting %s to %s % (self.name, value)
class baseX(object):
foo = descriptor()
class X(baseX):
pass
x = X()
x.foo = 'bar'
--
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Re: extract c/cpp include file with regular expression
2009/7/24 Philip Semanchuk phi...@semanchuk.com: I know this will sound like a sarcastic comment, but it is sincere: my suggestion is that if you want to parse C/C++ (or Python, or Perl, or Fortran, etc.), use a real parser, not regexes unless you're willing to sacrifice some accuracy. Sooner or later you'll come across some code that your regexes won't handle, like this -- #ifdef FOO_BAR #include this.h /* #else */ #include that.h #endif Parsing code is difficult... I understand your point, thanks for your suggestion, Philip. And I've met the problem like in your example The reason I choose regex because I barely know about real parser, for me it still in some dark area :) But I'll find something to learn. tiefeng wu 2009-07-23 -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: psyco V2
On 7/23/09 8:22 AM, Christian Heimes wrote: Christian Tismer wrote: Psyco V2 will run on X86 based 32 bit Linux, 32 bit Windows, and Mac OS X. Psyco is not supporting 64 bit, yet. But it is well being considered. Can you estimate how much work needs to be done in order to get Psyco working on 64bit POSIX (Linux) systems? This is not easy to tell. I'm in the process of estimating this, because my sponsor wants to know as well. They are very interested, but it has to be somehow affordable in time and money. There are different paths that can be taken. Simply hacking away, trying to go straight to 64 bit is obvious, but probably a bad approach. Half of the system needs to be rewritten and augmented with extra size info, and this goes very deep. I think this way I would produce a nightmare of even more complicated code, and would kill myself debugging-wise. I believe I need to simplify psyco and make many parts more abstract and more general, to become able to make it flexible. This also means slowing the compiler down quite a lot. Slowing it down will again become no problem, when my new compiler strategy is ready. The number of compilations will reduce so drastically, that the slowdown is neglectible. Yes, I did not give an answer. I have the vague feeling of three months full-time work. My problem right now is to ensure that it will become less and not more :-) cheers - chris -- Christian Tismer :^) mailto:tis...@stackless.com tismerysoft GmbH : Have a break! Take a ride on Python's Johannes-Niemeyer-Weg 9A :*Starship* http://starship.python.net/ 14109 Berlin : PGP key - http://wwwkeys.pgp.net/ work +49 30 802 86 56 mobile +49 173 24 18 776 fax +49 30 80 90 57 05 PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 whom do you want to sponsor today? http://www.stackless.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Changing the private variables content
Or, in other words, what Steven D'Aprano had already said. Guess I should read the whole thread before madly posting! :) ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: Balanced binary tree implementation
Lucas P Melo wrote: Hello, I would like to use a balanced binary tree implementation (preferably within some API). Any hints about where I could find it? I am looking for something that implements insertion, deletion, search and a special search that returns the lesser element bigger than a given key [1]. A nice possibility would be an extensible API that allows me to inherit its classes and to add operations myself. Thanks in advance. [1] Ex: 1 2 3 4 5 6 are elements of the bbt. If I use this operation given 4 as the parameter, the value returned would be 5. You might want to have a look at the btree implementation we have in mxBeeBase: http://www.egenix.com/products/python/mxBase/mxBeeBase/ It's written in C and optimized for on-disk operations. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Jul 23 2009) Python/Zope Consulting and Support ...http://www.egenix.com/ mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ ::: Try our new mxODBC.Connect Python Database Interface for free ! eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ -- http://mail.python.org/mailman/listinfo/python-list
Re: extract c/cpp include file with regular expression
On Jul 23, 2009, at 12:36 PM, tiefeng wu wrote: 2009/7/24 Philip Semanchuk phi...@semanchuk.com: I know this will sound like a sarcastic comment, but it is sincere: my suggestion is that if you want to parse C/C++ (or Python, or Perl, or Fortran, etc.), use a real parser, not regexes unless you're willing to sacrifice some accuracy. Sooner or later you'll come across some code that your regexes won't handle, like this -- #ifdef FOO_BAR #include this.h /* #else */ #include that.h #endif Parsing code is difficult... I understand your point, thanks for your suggestion, Philip. And I've met the problem like in your example The reason I choose regex because I barely know about real parser, for me it still in some dark area :) But I'll find something to learn. Yes! Learning is always good. And as I said, if you don't mind missing some unusual cases, regexes are fine. I don't know how accurate you want your results to be. As for real parsers, there's lots of them out there, although they may be overkill for what you want to do. Here's one written entirely in Python: http://www.dabeaz.com/ply/ Whatever you choose, good luck with it. Cheers Philip -- http://mail.python.org/mailman/listinfo/python-list
Re: PyQt GUI
On 2009-07-23 03:55, Helvin wrote: I believe I now have vtkpython.exe. However, my 'import vtk' statement in my python code is not working. The error says something like no module named vtk. Where do I find modules for vtk in pyqt? Do they exist? There are no VTK modules in PyQt itself. The PyQt support is in the vtk package which can be built with VTK itself. You will need to install VTK and the vtk package correctly in order to achieve this. vtkpython.exe is not going to help you. Ignore it. After you have built VTK, you need to do an extra step to install the vtk package to where your Python interpreter will be able to find it. Let's say that your build directory is c:\vtkbuild. cd \vtkbuild\Wrapping\Python python setup.py install cd \ Now you should be able to import vtk from your normal Python interpreter. If you are still having problems, you will need to copy-and-paste exactly what you did and what error messages you got. Do not paraphrase error messages. -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: psyco V2
On 7/17/09 4:11 AM, Bearophile wrote: Very good, thank you. I'll try it when I can. Is Psyco3 going to borrow/steal some ideas/code from Unladen Swallow? Psyco3: nice typo! :-) Well, I haven't so far found a new idea there that I'd want to borrow and did not know from PyPy, before. Wasn't the project plan saying the opposite, borrowing some ideas from psyco? :-) http://code.google.com/p/unladen-swallow/wiki/ProjectPlan The problem I have with Psyco1.6 is that you can't use the normal profilers to know how much seconds of running time is taken by each function/method of your code. Yes, the profiler hooks are not useful with psyco. You need to write extra functions for timing, as we do in the benchmark directory. Psyco1.6 has a profile() function, but I am not much able to use it yet. The profile() function is used for profile driven compilation, as opposed to psyco.full(). This will go away, pretty soon. Psyco will only be switched on or off. Maybe I will add an option for profiling the compiled code. Interesting idea! cheers - chris -- Christian Tismer :^) mailto:tis...@stackless.com tismerysoft GmbH : Have a break! Take a ride on Python's Johannes-Niemeyer-Weg 9A :*Starship* http://starship.python.net/ 14109 Berlin : PGP key - http://wwwkeys.pgp.net/ work +49 30 802 86 56 mobile +49 173 24 18 776 fax +49 30 80 90 57 05 PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 whom do you want to sponsor today? http://www.stackless.com/ -- http://mail.python.org/mailman/listinfo/python-list
installing 2.6 on vista64
I just downloaded and attempted to install python 2.6.2. The installer proceeds to do its work then dies, leaving an entry in the eventlog: Windows Installer installed the product. Product Name: Python 2.6.2. Product Version: 2.6.2150. Product Language: 1033. Installation success or error status: 1602. Googling for this I wasn't able to narrow the results down to something usable. Anyone know of issues and how to fix them installing on vista 64 (yes, I have 8 gigs of ram) -- http://mail.python.org/mailman/listinfo/python-list
Re: win32clipboard operation
On Jul 23, 9:05 am, MRAB pyt...@mrabarnett.plus.com wrote: LeeRisq wrote: Hi all, Newbie question. I've written a script that outputs to a text file. Now, I just want to copy the content to win32clipboard for access to other applications. Here's the mess I've come up with so far:) [snip] def copy_text(): ifile = open(rC:\Query\DQL.txt, r) text = ifile.read() ifile.close() win32clipboard.OpenClipboard() win32clipboard.EmptyClipboard() win32clipboard.SetClipboardText(text) win32clipboard.CloseClipboard() I've actually tried this configuration, but I did it again just to be sure. The program executes without exception, but the text still isn't copied to the clipboard. Any ideas? -- http://mail.python.org/mailman/listinfo/python-list
Re: import vs imp and friends.
On 2009-07-23 09:44, Emanuele D'Arrigo wrote:
Greetings,
I was looking in the archive of this newsgroup and I found this
snippet:
import imp
sourcecode = 'def foo(x): return 11*x'
mod = imp.new_module('foo')
exec sourcecode in mod.__dict__
mod.foo(16)
Together with similar and sometimes more complete snippets available
they show how a module can be created out of string, plain text files
and compiled files. Neat!
Now the question. Apart from checking sys.module first and eventually
adding the new module to it if it isn't there already, and apart from
setting __file__, is there anything else that import does and this
snippet doesn't?
Brett Cannon has a good presentation that covers basically the entirety of the
import mechanism:
http://us.pycon.org/2008/conference/schedule/event/12/
--
Robert Kern
I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth.
-- Umberto Eco
--
http://mail.python.org/mailman/listinfo/python-list
Re: If Scheme is so good why MIT drops it?
On Jul 21, 10:09 pm, Raffael Cavallaro raffaelcavall...@pas.espam.s.il.vous.plait.mac.com wrote: On 2009-07-21 19:06:02 -0400, Neil Hodgson nyamatongwe+thun...@gmail.com said: Python uses native threads. So it can be teh-slowness on all ur cores! http://shootout.alioth.debian.org/u64q/benchmark.php?test=nbody〈=all The global interpreter lock doesn't help much either. As you've linked to programs that /have not/ been written to use threading or multiple cores (look at the ~ CPU Load column) I get the feeling I'm missing the joke? -- http://mail.python.org/mailman/listinfo/python-list
Re: Help understanding the decisions *behind* python?
Phillip B Oldham wrote: My colleagues and I have been working with python for around 6 months now, and while we love a lot of what python has done for us and what it enables us to do some of the decisions behind such certain data-types and their related methods baffle us slightly (when compared to the decisions made in other, similarly powerful languages). Specifically the differences between lists and tuples have us confused and have caused many discussions in the office. We understand that lists are mutable and tuples are not, but we're a little lost as to why the two were kept separate from the start. They both perform a very similar job as far as we can tell. [rest of original snipped as already discussed] Sorry if this has been discussed and I've missed it, but how about memory allocation. An immutable tuple has a fixed memory allocation whereas that for the mutable list must be liable to change. You might like to look at the recent thread on this ng 'List insertion cost' and follow the links to Raymond Hettinger's power point presentation. Kindest regards. Mark Lawrence. -- http://mail.python.org/mailman/listinfo/python-list
Re: challenging problem for changing to a dedicated non-privileged user within a script.
Krishnakant hackin...@gmail.com (K) wrote: K On Thu, 2009-07-23 at 13:50 +0200, paul wrote: If the user running python program is allowed to call setuid() then yes. K NO, i don't think i can do that. I am getting opperation not permitted. K Any ways I think probably subprocess will have to sort it out. Did you try running sudo -u postgres blabla with subprocess? K Yes, but still not got the intended result which is now obvious. 2. now execute the python code for connecting to the postgresql database. In the second point I actually want to execute python code not shell level command so will the sudo -u in the subprocess.Popen change the user in the script? No, as the name subprocess suggests you are spawning a new process which gets another uid through sudo. This does not affect the parent process. K Ok then here is the work-around which I am thinking to try, Plese tell K me if it is correct. K I will let that subprocess start python inthe background and execute the K connecting code to postgresql including importing the pygresql library. K Then I will create the connection and cursor objcts in that subprocess. K But my concern is, will the connection object in the child process K (subprocess) be available to the parrent process? No. However it is still not clear why you want to run under the postgres user id. Why can't the original process not do the postgres connection? If that is really impossible, then you might start the new process with sudo and let it do a socket tunnelling to postgress, i.e. make a connection to the postgres server and a socket connection to the original Python script, and copy everything from one socket to the other - in both directions. However this can also be done with a ssh tunnel which might be simpler. -- Piet van Oostrum p...@cs.uu.nl URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
Re: If Scheme is so good why MIT drops it?
Perhaps like Xah Lee I find, after many years of Lisp programming, these discussions increasingly frustrating and even, in some sense, amazing. We can speculate all we want about syntax and semantics of programing languages. What counts in the end are really the PRAGMATICS of programming languages. How can I do something with a language that is USEFUL to me? Will the result be good looking, and snappy or some ugly, dated looking, crashing application? For instance, last time I played with Scheme (drScheme) to explore some OpenGL 3D issue I was not impressed at all. One can debate the syntax and semantics of Scheme but in that particular instance all that was important to me was the fact that the Scheme example performed terrible and the threading fell completely apart when running more that a single OpenGL window. Perhaps this was coded poorly but I don't care. Scheme left a pretty bad impression. alex Prof. Alexander Repenning University of Colorado Computer Science Department Boulder, CO 80309-430 -- http://mail.python.org/mailman/listinfo/python-list
Re: sqlite3 performance problems only in python
Stef Mientki stef.mien...@gmail.com (SM) wrote: SM btw, I don't know if it's of any importance, the SQL-statement I perform is SM select OPNAMEN.*, NAME, NAME_, SCORES.SCORE, PATIENT.* SM from OPNAMEN SMinner join POID_VLID on OPNAMEN.POID= POID_VLID.POID SMinner join VRAAGLST on VRAAGLST.VLID = POID_VLID.VLID SMinner join VLID_SSID on VRAAGLST.VLID = VLID_SSID.VLID SMinner join SUBSCHAAL_GEGEVENS on SUBSCHAAL_GEGEVENS.SSID = VLID_SSID.SSID SMinner join POID_SSID_SCID on ( OPNAMEN.POID= SM POID_SSID_SCID.POID ) and SM ( SUBSCHAAL_GEGEVENS.SSID = SM POID_SSID_SCID.SSID ) SMinner join SCORES on SCORES.SCID = SM POID_SSID_SCID.SCID SMinner join PID_POID on OPNAMEN.POID= PID_POID.POID SMinner join PATIENTon PATIENT.PID = PID_POID.PID SM where substr ( lower( NAME) , 1, 6) = 'cis20r' SMand lower ( NAME_ ) = 'fatigue' SMand TEST_COUNT in (3,4) SMand DATETIME 39814.0 SMand SCORE 30 1) Do you have indices on the join fields? 2) Look at the ANALYZE command 3) Look at the EXPLAIN command -- Piet van Oostrum p...@cs.uu.nl URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
