gmane.comp.python.general

Re: Python bindings tutorial

Dave Angel — 2010-03-18T23:13:59

I'm not talking about COM servers, which run in a separate process.  
Only about calling functionality that happens to be encoded in an .EXE file.

You're trying to generalize what I said.  I never said you could call 
into any .EXE file, just that calling into one is not infeasible.  
You're describing using an .EXE written using the Microsoft C compiler 
and/or libraries, not a Windows .EXE in general.  In any case, whenever 
you link to a module written in a different environment, you'll have 
restrictions.  Chief among them is the use of a compatible memory model, 
the stack conventions, the allocators, and so on..  Solving the thread 
issue is probably the easiest one to fix.

I'm not recommending it, just refuting the "not supposed to" quote above.

DaveA

should writing Unicode files be so slow

djc — 2010-03-18T22:29:41

I have a simple program to read a text (.csv) file and split it into
several smaller files. Tonight I decided to write a unicode variant and was
surprised at the difference in performance. Is there a better way?


the plain version is the same except for


The difference:

Re: sqlite3, memory db and multithreading

Aahz — 2010-03-18T22:06:00

In article <hnt81m$fsi$1< at >news.task.gda.pl>,
=?UTF-8?B?a3LDs2xld25h?=  <królewna< at >ee.pl> wrote:

You probably need to serialize access to the database through one thread.

Re: Nested Scopes unintended behaviour ?

Terry Reedy — 2010-03-18T21:13:18


unless there is a global/nonlocal declaration

  and that unlike

The language definition requires two passes after parsing.
One collects names and determines their scope (and looks for yield). The 
second generates code.
This allows the local namespace to be implemented as an array rather 
than a dict, so that local name lookup is an array index operation 
rather than a dict lookup operation. This is somewhat made visible by 
the dis module

 >>> from dis import dis
 >>> a = 1
 >>> def f():
b = 2
return a,b

 >>> dis(f)
   2           0 LOAD_CONST               1 (2)
               3 STORE_FAST               0 (b)

   3           6 LOAD_GLOBAL              0 (a)
               9 LOAD_FAST                0 (b)
              12 BUILD_TUPLE              2
              15 RETURN_VALUE

STORE/LOAD_FAST means store/load_local. Constants (2 in this case) are 
stored in the same array. There is apparently a separate array of global 
names, as opposed to local values.

Terry Jan Reedy

Re: logging: local functions ==> loss of lineno

Hellmut Weber — 2010-03-18T21:05:37

Am 11.03.2010 12:14, schrieb Peter Otten:

Hi Peter,
your hack is exactly what I was looking for.
It permits to configure my logging messages as I want, e.g. using 
different colors for different classes of messages.

I do not yet understand all details WHY it is working but suppose some 
study of the logging module will help me to understand.

Thank you very much

Re: Need advice on starting a Python group

Mike Orr — 2010-03-18T20:52:00

I've been involved in a Python users group since 2000, and have
attended or heard about a few others. The ones that have 20+ attendees
have a speaker every month. Our group is usually a show-and-tell and
open discussion, so we get around six people each month (but not the
same six). We've decided to solicit more talks as a way to increase
attendance.

I have never heard of a Python group focusing on code review, so I
don't know what attendance to expect for that. One problem is that
much of people's code is private at their workplace, and they can't
bring it to a meeting. I'd suggest expanding the focus a bit: code
review, writing unit tests for each other, pair programming, some open
"How do I do this in Python?" discussions, etc.

You're also limiting the pool of potential attendees by targeting one
institution. There are only a subset there who are interested in
Python, a smaller subset who can attend meetings, and an even smaller
subset who are willing to attend meetings even if they can. A citywide
gro

Re: question about tkinter

furlan — 2010-03-18T20:44:18


<snip>

Don't know if this will help and I had in a file in my Solutions folder
from 2008 the following:

If Tkinter does not seem to be loaded run:

sudo yum -y install python-tools

which will install Tkinter and dependencies.

HTH

ciao,
f

importing python project in my application

Betül — 2010-03-18T19:51:47

Re: highlight words by regex in pdf files using python

TP — 2010-03-18T19:36:20

Take a look at the Acrobat SDK
(http://www.adobe.com/devnet/acrobat/?view=downloads). In particular
see the Acrobat Interapplication Communication information at
http://www.adobe.com/devnet/acrobat/interapplication_communication.html.

"Spell-checking a document" shows how to spell check a PDF using
visual basic at
http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/wwhelp/wwhimpl/common/html/wwhelp.htm?context=Acrobat9_HTMLHelp&file=IAC_DevApp_OLE_Support.100.17.html

"Working with annotations" shows how to add an annotation with visual
basic at http://livedocs.adobe.com/acrobat_sdk/9.1/Acrobat9_1_HTMLHelp/wwhelp/wwhimpl/common/html/wwhelp.htm?context=Acrobat9_HTMLHelp&file=IAC_DevApp_OLE_Support.100.16.html.

Presumably combining the two examples with Python's win32com should
allow you to do what you want.

Re: did anybody play with python and window mobile broadband?

News123 — 2010-03-18T19:32:23

Hy Eglyph,

eglyph< at >gmail.com wrote:

No I'm using C-Python on a small windows PC (Atom) with a USB Boradband
modem.

Could you forward me the discussion in case you remember the forum?



Thanks, I'll read into it.

bye

N

Re: did anybody play with python and window mobile broadband?

News123 — 2010-03-18T19:29:37

Hi Sanjiva,


Sanjiva P. wrote:
Thanks, yes AT commands would be fine.
How can I send AT commands, while another application / connection
mnager is using the modem?


I just don't know how to send AT commands to a connected modem.



What do you mean with pluggging in?

ctypes?
or something else?




bye


N

Re: class inheritance

JLundell — 2010-03-18T18:01:18

On Mar 17, 5:12 pm, Steven D'Aprano
<ste...< at >REMOVE.THIS.cybersource.com.au> wrote:

Thanks, Steven. I'd considered and rejected that a while ago, but on
reconsideration it's sounding like a better idea. Aside from
preserving the semantics of =, it makes the use of approximate
equality explicit in the code, and that's a plus for what I'm doing.
I'll give it a shot.

Re: Need to create subprocess...

Patrick Maupin — 2010-03-18T17:30:01

On Mar 18, 11:17 am, "drstoka" <filip.popravi.stojmeno...< at >fer.hr>
wrote:

I have a module that does this and more, but it only works on Linux:

http://code.google.com/p/rst2pdf/source/browse/trunk/rst2pdf/tests/execmgr.py

For usage examples, you can just execute it.  Also, see autotest.py in
the same directory.

Regards,
Pat

Re: Need to create subprocess...

Martin P. Hellwig — 2010-03-18T17:25:33

Try searching around for "threading.thread python" it should give you 
some clues, if you can't work through the info (it can be a bit hard to 
digest), just post here an example of your test code along with what you 
expected and what didn't happen.

Re: Method / Functions - What are the differences?

John Posner — 2010-03-18T16:48:35

I was trying to avoid the function-vs-method swamp, and so I used 
"procedure". I agree that it was an unfortunate strategy. In a rewrite, 
I'm using "function" for the most part


Agreed -- I was trying too hard to be helpful, and introduced 
unnecessary terminology.


That was my intention. I hope it comes across more clearly in the rewrite.


That doesn't bother me. It's OK to describe capabilities -- but not give 
how-to's -- in an overview section.



And Edward Cherlin wrote:


   ...


I was headed toward having the reader *really* understand the < at >property 
decorator. And I was intending that reader to be a non-advanced Python 
user -- say, at the CS 101 level. I'm now convinced that such a goal was 
"a bridge too far". It has a lot moving parts, including a prerequisite 
that is a major topic in itself -- the descriptor protocol. That puts 
the goal way beyond reach.




There's another draft at:

   http://www.jjposner.net/media/python-properties-0318.pdf


Many thanks for your comments,
John

Re: C-API PyObject_Call

Stefan Behnel — 2010-03-18T16:43:28

moerchendiser2k3, 18.03.2010 14:58:

Then please explain what kind of Python line number you expect to find in C 
code.

Hint: providing details often results in getting helpful answers.

Stefan

Re: C++ code generation

Chris Colbert — 2010-03-18T16:28:53

Need to create subprocess...

drstoka — 2010-03-18T16:17:11

Hello,

I have to run a program as a child process inside my python program and 
redirect it's output through a pipe to a parent program process.
So, I wrote this:

pipe = Popen('example_program', shell=True, bufsize=0, stdout=PIPE).stdout

and it works great.

Now, in parent program I need to wait for a some time and if a child 
(example_program) does not finish in that time, kill the child.

How do I do that? Please help.

Re: Install 2.6.4 as non-admin on Windows

Mark Carter — 2010-03-18T15:36:11

Thanks. That sounds easy enough to do. I guess it's the same deal with
win32all.

Re: Install 2.6.4 as non-admin on Windows

2010-03-18T15:23:44

The only file written to a system folder is python2x.dll (I think it's
not true for python2.6 any longer), so your approach is perfectly
valid if you can put this dll into a folder where it can be found by
the system.

PortablePython does this almost the same.

--
regards, eGlyph

Re: sqlite3, memory db and multithreading

DreiJane — 2010-03-18T14:49:29

Hello,

i cannot help you directly with sqlite2 in the Standardlib, since i am
used to work with Roger Binns's apsw. After a short experiment with
pysqlite leading to data loss - caused by one of the unclearer
exception messages of sqlite3 and me having a bad day - i at once
turned back to apsw. And so far i haven't done much with threads.

Principally sqlite connections (sqlite3 objects in the C-API) can be
used over multiple threads - and connections to :memory: make no
difference. There are additional parameters to open() giving fine-
tuned control. And apsw is promising a true reflection of sqlite's C-
API.

Regards, Joost