Re: How to create a virtual serial port?

Stuart Davenport wrote: ... I'm on a OS X, python 2.5. Basically I will have a remote application pushing data (GPS) over the network to a python application I have running on my Mac, I want this python application to again push the data on to a "virtual serial port". Then the GPS program I have

communication between objects - help

thanks a lot.. I think passing the main object only by reference.. so, this does not causes any overhead.. am i correct..? On Fri, Apr 10, 2009 at 4:02 PM, Dave Angel wrote: > > > Murali kumar wrote: > >> hi all.. >> I'm posted in a word doc becoz to add a image to explain my problem.. >> als

Re: safe eval of moderately simple math expressions

Aaron Brady wrote: Would you be willing to examine a syntax tree to determine if there are any class accesses? Sure? How do I do that? I've never done that type of thing before so I can't really say if it would work or not. /Joel -- http://mail.python.org/mailman/listinfo/python-list

Re: safe eval of moderately simple math expressions

On Apr 10, 7:54 pm, Steven D'Aprano wrote: > On Thu, 09 Apr 2009 13:13:50 -0400, Terry Reedy wrote: > > Joel Hedlund wrote: > >> Hi all! > > >> I'm writing a program that presents a lot of numbers to the user, and I > >> want to let the user apply moderately simple arithmentics to these > >> numbe

Re: weird try/finally behaviour

On Apr 10, 7:19 pm, Terry Reedy wrote: > Sylvain Thénault wrote: > > Hi there, > > > I've encountered the following behaviour which I found surprising: - > If you say 'print test()', you shoud see None printed after 'end' (at > least with 3.0) from the function falling off the end. > > The 'if Tru

Re: safe eval of moderately simple math expressions

Matt Nordhoff wrote: '\x5f' '_' getattr(42, '\x5f\x5fclass\x5f\x5f') # __class__ Is that enough to show you the error of your ways? No, because >>> print '_' in '\x5f\x5fclass\x5f\x5f' True :-D Cuz seriously, it's a bad idea. Yes probably, but that's not why. :-) (BTW: What if a use

Re: safe eval of moderately simple math expressions

Matt Nordhoff wrote: '\x5f' '_' getattr(42, '\x5f\x5fclass\x5f\x5f') # __class__ Is that enough to show you the error of your ways? No, because >>> print '_' in '\x5f\x5fclass\x5f\x5f' True :-D Cuz seriously, it's a bad idea. Yes probably, but that's not why. :-) (BTW: What if a use

Re: safe eval of moderately simple math expressions

Joel Hedlund wrote: > Matt Nordhoff wrote: > '\x5f' >> '_' > getattr(42, '\x5f\x5fclass\x5f\x5f') # __class__ >> >> >> Is that enough to show you the error of your ways? > > No, because > > >>> print '_' in '\x5f\x5fclass\x5f\x5f' > True But what you're planning to do seems more like

Reading 3 objects at a time from list

Hi all, let's see if there is a more "pythonic" way of doing what I'm trying to do. I have a lot of strings with numbers like this one: string = "-1 1.3 100.136 1 2.6 100.726 1 3.9 101.464 -1 5.2 102.105" I need to pass the numbers to a function, but three at a time, until the string ends. The st

Re: Reading 3 objects at a time from list

On Sat, Apr 11, 2009 at 1:44 AM, Matteo wrote: > Hi all, > let's see if there is a more "pythonic" way of doing what I'm trying > to do. > I have a lot of strings with numbers like this one: > > string = "-1 1.3 100.136 1 2.6 100.726 1 3.9 101.464 -1 5.2 102.105" > > I need to pass the numbers to

Re: How to create a virtual serial port?

In message , Stuart Davenport wrote: > Then the GPS program I have running on my MAC, RouteBuddy, can read the > data from that serial port as standard. Macs don't have serial ports. -- http://mail.python.org/mailman/listinfo/python-list

Re: safe eval of moderately simple math expressions

Peter Otten wrote: But what you're planning to do seems more like def is_it_safe(source): ... return "_" not in source ... source = "getattr(42, '\\x5f\\x5fclass\\x5f\\x5f')" if is_it_safe(source): ... print eval(source) ... Bah. You are completely right of course. Just as a thou

Re: An object that creates (nested) attributes automatically on assignment

On Apr 11, 1:22 pm, Steven D'Aprano wrote: > Is "pants" slang for "fragile, hard to understand and difficult to debug"? pommy slang for "sucks intensely, like the Deathstar's tractor beam" ... I think we agree with him. -- http://mail.python.org/mailman/listinfo/python-list

Re: safe eval of moderately simple math expressions

Joel Hedlund wrote: > Peter Otten wrote: >> But what you're planning to do seems more like >> > def is_it_safe(source): >> ... return "_" not in source >> ... > source = "getattr(42, '\\x5f\\x5fclass\\x5f\\x5f')" > if is_it_safe(source): >> ... print eval(source) >> ... >> >

Re: Python 2.6/3.0 packages for Ubuntu?

s...@pobox.com ha scritto: Does Ubuntu really not have Python 2.6 or 3.0 packages or do I just have my package list misconfigured? I'm setting up a fresh machine and am not too Ubuntu-aware. Is there a list of package repositories around somewhere? Thx, In current 8.10, the default python is

Re: safe eval of moderately simple math expressions

Peter Otten wrote: def is_it_safe(source): return "_" not in source and r'\' not in source "".join(map(chr, [95, 95, 110, 111, 95, 95])) '__no__' But you don't have access to neither map or chr? /Joel -- http://mail.python.org/mailman/listinfo/python-list

Re: Adding a Badge to an Icon in Mac OS X

On 10Apr2009 19:56, Miles wrote: | On Fri, Apr 10, 2009 at 5:22 PM, bingo wrote: | > PyObjc seems to offer the option to add badges to icons in the doc. I | > need to add badges to any icon... kinda like SCPlugin and dropbox do. | > I think that SCPlugin is doing it through carbon Icon Services. B

Re: safe eval of moderately simple math expressions

Joel Hedlund wrote: > Peter Otten wrote: >>> def is_it_safe(source): >>> return "_" not in source and r'\' not in source >> > "".join(map(chr, [95, 95, 110, 111, 95, 95])) >> '__no__' > > But you don't have access to neither map or chr? > > /Joel >>> '5f5f7374696c6c5f6e6f745f736166655

Re: safe eval of moderately simple math expressions

Peter Otten wrote: Joel Hedlund wrote: Peter Otten wrote: def is_it_safe(source): return "_" not in source and r'\' not in source "".join(map(chr, [95, 95, 110, 111, 95, 95])) '__no__' But you don't have access to neither map or chr? /Joel '5f5f7374696c6c5f6e6f745f736166655f5f'.dec

Re: Reading 3 objects at a time from list

Chris Rebert ha scritto: On Sat, Apr 11, 2009 at 1:44 AM, Matteo wrote: Hi all, let's see if there is a more "pythonic" way of doing what I'm trying to do. I have a lot of strings with numbers like this one: string = "-1 1.3 100.136 1 2.6 100.726 1 3.9 101.464 -1 5.2 102.105" I need to pass t

Re: How to create a virtual serial port?

On 11 Apr, 08:52, Scott David Daniels wrote: > Stuart Davenport wrote: > > ... I'm on a OS X, python 2.5. Basically I will have a remote application > > pushing data (GPS) over the network to a python application I have > > running on my Mac, I want this python application to again push the > > da

Re: An object that creates (nested) attributes automatically on assignment

Hi Steven, Thank you for your response! On Apr 11, 4:22 am, Steven D'Aprano wrote: > On Fri, 10 Apr 2009 19:04:38 -0700, Edd wrote: > > Hi folks, > > > I'd like to use Python itself as the configuration language for my > > Python application. I'd like the user to be able to write something like

Re: Reading 3 objects at a time from list

Matteo wrote: > Hi all, > let's see if there is a more "pythonic" way of doing what I'm trying > to do. > I have a lot of strings with numbers like this one: > > string = "-1 1.3 100.136 1 2.6 100.726 1 3.9 101.464 -1 5.2 102.105" > > I need to pass the numbers to a function, but three at a time

Re: safe eval of moderately simple math expressions

On Apr 11, 3:18 am, Joel Hedlund wrote: > Aaron Brady wrote: > > Would you be willing to examine a syntax tree to determine if there > > are any class accesses? > > Sure? How do I do that? I've never done that type of thing before so I > can't really say if it would work or not. > > /Joel NO PROM

Re: safe eval of moderately simple math expressions

On Sat, 11 Apr 2009 11:03:16 +0200, Joel Hedlund wrote: > Peter Otten wrote: >> But what you're planning to do seems more like >> > def is_it_safe(source): >> ... return "_" not in source >> ... > source = "getattr(42, '\\x5f\\x5fclass\\x5f\\x5f')" if > is_it_safe(source): >> ...

Re: I can't get RLock to work (warning, the following code is pretty long)

I think it would help if you would call your functions in get_both_parts with some arguments ... -- http://mail.python.org/mailman/listinfo/python-list

ANN: PyGUI 2.0

PyGUI 2.0 is available: http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/ Highlights of this release: * Native Windows implementation, based on pywin32 and ctypes. * Full set of Postscript-style path construction operators available on all platforms. * Mouse and keyboard events can

storing variable value

Hi! I'm writing a program to provide me with battery warnings when my battery hits certain levels. It just checks the current level and does something. I plan to call it from a a cron job. But If the cron runs every minute, warnings every minute would be rather annoying. so is there a way to make

Re: Unsupported operand types in if/else list comprehension

Mike H schrieb: Thanks to all of you. FYI, I'm doing this because I'm working on creating some insert statements in SQL, where string values need to be quoted, and integer values need to be unquoted. I wanted to be sure that I could pass these values to the list in a normal way e.g. ['test', 1,

Re: An object that creates (nested) attributes automatically on assignment

On Sat, 11 Apr 2009 03:01:48 -0700, Edd wrote: > Yes I probably mean instance attributes. Forgive me, I am not > particularly sure of the terminology. But your MyClass example, won't > quite do what I want, as I'd like to be able to define instance > attributes on top of instance attributes by ass

Re: storing variable value

Daniel Dalton schrieb: Hi! I'm writing a program to provide me with battery warnings when my battery hits certain levels. It just checks the current level and does something. I plan to call it from a a cron job. But If the cron runs every minute, warnings every minute would be rather annoying. s

Re: storing variable value

On Sat, 11 Apr 2009 21:36:43 +1000, Daniel Dalton wrote: > Hi! > > I'm writing a program to provide me with battery warnings when my > battery hits certain levels. It just checks the current level and does > something. I plan to call it from a a cron job. But If the cron runs > every minute, warn

Multithreading / multiprocess

Is there anyway to begin a thread and execute a finite number of lines of code, or a finite amount of time within it? For example, say I create three child threads and I want to guarantee equal timeshare between them, can I specify a quanta (say 400 LOC although I know that is pretty small) to exe

Re: An object that creates (nested) attributes automatically on assignment

On Apr 11, 12:54 pm, Steven D'Aprano wrote: > Ah, now it is more clear. > > Okay, let's try this: > > >>> class C(object): > > ...     def __getattr__(self, name): > ...             # Only called if self.name doesn't exist. > ...             inst = self.__class__() > ...             setattr(self,

Re: Multithreading / multiprocess

tleeuwenb...@gmail.com schrieb: Is there anyway to begin a thread and execute a finite number of lines of code, or a finite amount of time within it? For example, say I create three child threads and I want to guarantee equal timeshare between them, can I specify a quanta (say 400 LOC although I

Using percent signs with SafeConfigParser

Hi, Does the SafeConfigParser class correctly detects lone percent signs? For example, shouldn't the string "100%%" be accepted as a valid value? Executing the code below should only print one error, instead it prints 2. (I've tested this with version 2.6.1 on Windows XP.) It seems the "_badperce

Re: communication between objects - help

Murali kumar wrote: thanks a lot.. I think passing the main object only by reference.. so, this does not causes any overhead.. am i correct..? On Fri, Apr 10, 2009 at 4:02 PM, Dave Angel wrote: Murali kumar wrote: hi all.. I'm posted in a word doc becoz to add a image to explai

multiprocessing and Locks

Hi All, I am trying to understand multiprocessing, but I am getting a Runtime error on the code below. What am I missing or doing wrong? Error is: RuntimeError: Lock objects should only be shared between processes through inheritance I am using: Python 2.6 (r26:66714, Nov 28 2008, 22:17:21) [GCC

Re: safe eval of moderately simple math expressions

On Apr 11, 2:41 am, Aaron Brady wrote: > > Why do I get the feeling that the authors of 'pyparsing' are out of > breath? > What kind of breathlessness do you mean? I'm still breathing, last time I checked. The-rumors-of-my-demise-have-been-greatly-exaggerated'ly yours, -- Paul -- http://mail.

[ANN] Falcon - powering innovation

If anybody is interesed in new technologies, you'll love this new language called Falcon [1], which has been open sourced ago little time. Falcon is a scripting engine ready to empower mission-critical multithreaded applications. It provides six integrated programming paradigms: procedural, object

Re: storing variable value

Daniel Dalton wrote: Hi! I'm writing a program to provide me with battery warnings when my battery hits certain levels. It just checks the current level and does something. I plan to call it from a a cron job. But If the cron runs every minute, warnings every minute would be rather annoying. s

Re: How to create a virtual serial port?

On 2009-04-10, Stuart Davenport wrote: > I'm on a OS X, python 2.5. Basically I will have a remote > application pushing data (GPS) over the network to a python > application I have running on my Mac, I want this python > application to again push the data on to a "virtual serial > port". Then th

Merging byte arrays

Hello I'm using this function to read data in byte format from file def readBytes(file, offset, size): file.seek(offset) return file.read(size) file is opened with open function: file = open(path, "rb") then i'm using array.array('B', bytes) to parse read-out data, for example in this

Definition of Pythonic?

Hi there, I'm starting an exploratory foray into Python, being generally dissatisfied with the Ruby ecosystem (while the language is wonderful, third party libraries and documentation are not). Having written a few trivial scripts in Python, I'm curious as to how you would sum up the Pythonic

Re: Why is it that *dbm modules don't provide an iterator? (Language design question)

Opened a ticket for this and attached a patch. (experimental) http://bugs.python.org/issue5736 On Fri, Apr 10, 2009 at 8:39 AM, "Martin v. Löwis" wrote: I assumed there were some decisions behind this, rather than it's just not implemented yet. >>> I believe this assumption is wrong - i

completly unrelated to python but i had to post it

i know, i know , this group is about python, but this artilce i just read, well i was pretty much just surfing the web when i found this article made in 2001, it is just 2 funny. http://www.adequacy.org/stories/2001.12.2.42056.2147.html\ if u've never read it, it'll knock ur socks off, and the co

Re: numpy.where

In article <747te7f1209a...@mid.individual.net>, Peter Pearson wrote: > On Thu, 09 Apr 2009 09:09:18 -0400, Lou Pecora wrote: > > > > Really, I've gotta RTFM. :-) > > Hey, if you find TFM, please tell me where it is. I haven't > found anything Fine. I even bought Travis Oliphant's book, > wh

llvm vs. parrot

Is Parrot out of favor these days? It appears that Google is going to use llvm. http://code.google.com/p/unladen-swallow/ -- http://mail.python.org/mailman/listinfo/python-list

Re: Definition of Pythonic?

Having written a few trivial scripts in Python, I'm curious as to how you would sum up the Pythonic philosophy of development. Judging from Python, it seems to exclude (mostly) "magical" variables like '$.'. Is this right? What else would you include in this definition? At the python command-p

Re: Definition of Pythonic?

Emm> Having written a few trivial scripts in Python, I'm curious as to Emm> how you would sum up the Pythonic philosophy of development. Try import this at your friendly, neighborhood Python prompt. -- Skip Montanaro - s...@pobox.com - http://www.smontanaro.net/ "XML sucks

Re: llvm vs. parrot

On Fri, Apr 10, 2009 at 20:16, Paul Watson wrote: > Is Parrot out of favor these days? It appears that Google is going to > use llvm. > As far as I can recall, Parrot was supposed to be an April Fools Day joke (literally) that was taken way too seriously. Parrot may had made a lot of sense years

Re: Merging byte arrays

Gabriel wrote: Hello I'm using this function to read data in byte format from file def readBytes(file, offset, size): file.seek(offset) return file.read(size) file is opened with open function: file = open(path, "rb") then i'm using array.array('B', bytes) to parse read-out data, for

Startup with Python

Hello, I am a beginner in Python , i am not able to set the environment variable in windows so that i can execute python script through command prompt , and also i am not able to male *.py as executable i.e. whenever i double click the file it should run it. Please help and reply me at findra...@gm

Re: Pathological regular expression

On Thu, 09 Apr 2009 02:56:00 -0700, David Liang wrote: > Hi all, > I'm having a weird problem with a regular expression (tested in 2.6 and > 3.0): > > Basically, any of these: > _re_comments = re.compile(r'^(([^\\]+|\\.|"([^"\\]+|\\.)*")*)#.*$') > _re_comments = re.compile(r'^(([^#]+|\\.|"([^"\\]

Re: How to create a virtual serial port?

Stuart Davenport wrote: On 11 Apr, 08:52, Scott David Daniels wrote: Stuart Davenport wrote: ... I'm on a OS X, python 2.5 Then the GPS program I have running on my MAC, RouteBuddy, can read the data from that serial port as standard. I'ms confused by this statement. What physical connec

Writing a "Raw" Image to a File (Win, PIL)

I have an image of described as: Img Info: {} size: (640, 480) format: None mode: P palette: bands: ('P',) type: I'd like to write it to a file. Apparently, I need to convert it to a string first. How do I do that? Pickle? -- W. eWatson

Re: Unsupported operand types in if/else list comprehension

Ok, thanks again to everyone for their suggestions, even if it appears I was going down the wrong path at the start. I'm a grad student creating this database to hold some of my own research on an isolated server, so security, etc. isn't my biggest concern -- but I would like to do this right. Here

Re: Pathological regular expression

Steven D'Aprano wrote: On Thu, 09 Apr 2009 02:56:00 -0700, David Liang wrote: Hi all, I'm having a weird problem with a regular expression (tested in 2.6 and 3.0): Basically, any of these: _re_comments = re.compile(r'^(([^\\]+|\\.|"([^"\\]+|\\.)*")*)#.*$') _re_comments = re.compile(r'^(([^#]+|

Re: Pathological regular expression

On Apr 12, 1:07 am, Steven D'Aprano wrote: > On Thu, 09 Apr 2009 02:56:00 -0700, David Liang wrote: > > Hi all, > > I'm having a weird problem with a regular expression (tested in 2.6 and > > 3.0): > > > Basically, any of these: > > _re_comments = re.compile(r'^(([^\\]+|\\.|"([^"\\]+|\\.)*")*)#.*$

Re: Writing a "Raw" Image to a File (Win, PIL)

W. eWatson schrieb: I have an image of described as: Img Info: {} size: (640, 480) format: None mode: P palette: bands: ('P',) type: I'd like to write it to a file. Apparently, I need to convert it to a string first. How do I do that? Pickle? Did you bother reading the PIL docu

Re: Pathological regular expression

> IMHO it's not a bug -- s/hang/takes a long time to compute/ > ‎That is quite what a hang is, and why the timeout was invented. The real bug is that there is no timeout mechanism. > Just look at it: 2 + operators and 3 * operators ... It's one of those > "come back after lunch" REs. > Some user

Re: Definition of Pythonic?

In article , Emmanuel Surleau wrote: > >Having written a few trivial scripts in Python, I'm curious as to how you >would sum up the Pythonic philosophy of development. Judging from Python, it >seems to exclude (mostly) "magical" variables like '$.'. Is this right? What >else would you include

Re: Unsupported operand types in if/else list comprehension

Well, I'm an idiot. Obviously, the line "VALUES (%s, %s, %s);" needs to be modified to adapt for the number of arguments in the list. But otherwise On Sat, Apr 11, 2009 at 11:28 AM, Mike H wrote: > Ok, thanks again to everyone for their suggestions, even if it appears > I was going down the w

Re: Definition of Pythonic?

On Apr 11, 10:08 am, Emmanuel Surleau wrote: > Having written a few trivial scripts in Python, I'm curious as > to how you would sum up the Pythonic philosophy of development. A couple of others have already mentioned the Zen of Python, available at the Python command prompt. I would agree with

Re: Startup with Python

Strato wrote: Hello, I am a beginner in Python , i am not able to set the environment variable in windows so that i can execute python script through command prompt , and also i am not able to male *.py as executable i.e. whenever i double click the file it should run it. Please help and reply me

Re: Startup with Python

Strato wrote: Hello, I am a beginner in Python , i am not able to set the environment variable in windows so that i can execute python script through command prompt , and also i am not able to male *.py as executable i.e. whenever i double click the file it should run it. Download and install t

Re: Definition of Pythonic?

John Yeung wrote: On Apr 11, 10:08 am, Emmanuel Surleau wrote: Having written a few trivial scripts in Python, I'm curious as to how you would sum up the Pythonic philosophy of development. A couple of others have already mentioned the Zen of Python, available at the Python command prompt. I

Re: Writing a "Raw" Image to a File (Win, PIL)

Diez B. Roggisch wrote: W. eWatson schrieb: I have an image of described as: Img Info: {} size: (640, 480) format: None mode: P palette: bands: ('P',) type: I'd like to write it to a file. Apparently, I need to convert it to a string first. How do I do that? Pickle? Did you bo

Re: Pathological regular expression

Dotan Cohen wrote: IMHO it's not a bug -- s/hang/takes a long time to compute/ ‎That is quite what a hang is, and why the timeout was invented. The real bug is that there is no timeout mechanism. I wouldn't call it a "hang" because it is actually doing work. If it was 'stuck' on a certain pa

Re: safe eval of moderately simple math expressions

On Apr 11, 8:09 am, Paul McGuire wrote: > On Apr 11, 2:41 am, Aaron Brady wrote: > > > > > Why do I get the feeling that the authors of 'pyparsing' are out of > > breath? > > What kind of breathlessness do you mean?  I'm still breathing, last > time I checked. > > The-rumors-of-my-demise-have-bee

Re: Can't create list of dictionaries

On Apr 10, 12:36 pm, sophie_newbie wrote: I've got a function that returns a dictionary, I need to loop and return 1000 dictionaries and append them to a list, but the thing is that when I do the list.append(funtThatReturnsDict()) the resulting only ever has 1 dictionary attached to it, even af

Re: ANN: PyGUI 2.0

Line 25 of setup.py should be: packages.append("GUI.Gtk") -- http://mail.python.org/mailman/listinfo/python-list

Re: Writing a "Raw" Image to a File (Win, PIL)

W. eWatson wrote: I have an image of described as: Img Info: {} size: (640, 480) format: None mode: P palette: bands: ('P',) type: I'd like to write it to a file. Apparently, I need to convert it to a string first. How do I do that? Pickle? Have you tried the .tostring() method

Re: Async serial communication/threads sharing data

On Wed, 25 Mar 2009 22:23:25 -0700, John Nagle wrote: Jean-Paul Calderone wrote: On Tue, 24 Mar 2009 22:20:49 -0700, John Nagle wrote: Jean-Paul Calderone wrote: On Mon, 23 Mar 2009 05:30:04 -0500, Nick Craig-Wood wrote: Jean-Paul Calderone wrote: [snip] After bringing in all the heav

Re: Pathological regular expression

On Apr 11, 10:07 am, Steven D'Aprano wrote: > On Thu, 09 Apr 2009 02:56:00 -0700, David Liang wrote: > > Hi all, > > I'm having a weird problem with a regular expression (tested in 2.6 and > > 3.0): > > > Basically, any of these: > > _re_comments = re.compile(r'^(([^\\]+|\\.|"([^"\\]+|\\.)*")*)#.*

Re: Writing a "Raw" Image to a File (Win, PIL)

MRAB wrote: W. eWatson wrote: I have an image of described as: Img Info: {} size: (640, 480) format: None mode: P palette: bands: ('P',) type: I'd like to write it to a file. Apparently, I need to convert it to a string first. How do I do that? Pickle? Have you tried the .tost

Re: Multithreading / multiprocess

In article <57065c62-2024-47b5-a07e-1d60ff85b...@y10g2000prc.googlegroups.com>, tleeuwenb...@gmail.com wrote: > >Is there anyway to begin a thread and execute a finite number of lines >of code, or a finite amount of time within it? > >For example, say I create three child threads and I want to gua

Re: How to create a virtual serial port?

On 2009-04-11, Scott David Daniels wrote: ... I'm on a OS X, python 2.5 Then the GPS program I have running on my MAC, RouteBuddy, can read the data from that serial port as standard. > I'ms confused by this statement. What physical connector does > your "serial port" use to

Re: sharing/swapping items between lists

In article <4fd78ac3-ba83-456b-b768-3a0043548...@f19g2000vbf.googlegroups.com>, Ross wrote: > >I'm trying to design an iterator that produces two lists. The first >list will be a list of unique pairings and the second will be a list >of items that weren't used in the first list. After each round,

Re: Pathological regular expression

On Sat, 11 Apr 2009 08:40:03 -0700, John Machin wrote: >> To my mind, this is a bug in the RE engine. Is there any reason to not >> treat it as a bug? > > IMHO it's not a bug -- s/hang/takes a long time to compute/ > > Just look at it: 2 + operators and 3 * operators ... It's one of those > "com

Re: Reading 3 objects at a time from list

In article <49e06774$0$700$5fc3...@news.tiscali.it>, Francesco Bochicchio wrote: >> On Sat, Apr 11, 2009 at 1:44 AM, Matteo wrote: >>> >>> I need to pass the numbers to a function, but three at a time, until >>> the string ends. The strings are of variable length, but always a >>> multiple of th

Re: Pathological regular expression

> Well, it's been running now for about two and a half hours, that's a > rather long lunch. I'd also like a pony! -- Dotan Cohen http://what-is-what.com http://gibberish.co.il -- http://mail.python.org/mailman/listinfo/python-list

Re: How to create a virtual serial port?

On 2009-04-11, Grant Edwards wrote: > You can write a port redirector in user-space in MS-Windows, > but you can't in Linux/Unix. On Unix systems you have to > write a kernel module that sits below the tty layer. Perhaps I should elucidate further. That's what the "pty" driver on Unix is: a ke

Re: Definition of Pythonic?

On Saturday 11 April 2009 18:00:58 John Yeung wrote: > On Apr 11, 10:08 am, Emmanuel Surleau > > wrote: > > Having written a few trivial scripts in Python, I'm curious as > > to how you would sum up the Pythonic philosophy of development. > > A couple of others have already mentioned the Zen of Py

design question, metaclasses?

I am working on a project that provides a high level interface to hdf5 files by implementing a thin wrapper around h5py. I would like to generalize the project so the same API can be used with other formats, like netcdf or ascii files. The format specific code exists in File, Group and Dataset clas

Re: Pathological regular expression

On Apr 11, 12:40 pm, Steven D'Aprano wrote: > On Sat, 11 Apr 2009 08:40:03 -0700, John Machin wrote: > >> To my mind, this is a bug in the RE engine. Is there any reason to not > >> treat it as a bug? > > > IMHO it's not a bug -- s/hang/takes a long time to compute/ > > > Just look at it: 2 + oper

Re: How to create a virtual serial port?

Grant Edwards wrote: On 2009-04-11, Grant Edwards wrote: You can write a port redirector in user-space in MS-Windows, but you can't in Linux/Unix. On Unix systems you have to write a kernel module that sits below the tty layer. Perhaps I should elucidate further. This part I actually unde

Regex similar to "^(?u)\w$", but without digits?

Hello, I'd like to create a regex that captures any unicode character, but not the underscore and the digits 0-9. "^(?u)\w$" captures them also. Is there a possibility to restrict an expression like "\w" to "\w without [0-9_]"? I'm using python 2.5.4 Thanks in advance, Andreas -- http://mail.pyth

Re: Unsupported operand types in if/else list comprehension

Sigh. One more. And again, thank you for all of the help. I realized that the last version that I posted took care of an SQL injection problem for the values, but not for the fields. So, I went ahead and modified the code: def new_insert_cmd(myTable, myFields, myValues): """Imports given fiel

Re: Definition of Pythonic?

John Yeung writes: > A couple of others have already mentioned the Zen of Python, available > at the Python command prompt. I would agree with that, but also add > the caveat that none of the principles expressed there are hard-and- > fast rules. Indeed, I'd suggest that the very lack of hard-a

Re: How to create a virtual serial port?

In article <6lgdnsbypsl1fx3unz2dnuvz_uqdn...@pdx.net>, Scott David Daniels wrote: > This part I actually understand. The OP has a program named > "RouteBuddy" that talks to a device over a serial port, and he > want to repalce the data stream coming from that device. My > question is, "where do

Re: Using percent signs with SafeConfigParser

Márcio Faustino wrote: > Does the SafeConfigParser class correctly detects lone percent signs? > For example, shouldn't the string "100%%" be accepted as a valid > value? Executing the code below should only print one error, instead > it prints 2. (I've tested this with version 2.6.1 on Windows XP

Re: Reading 3 objects at a time from list

Matteo wrote: > it works and I like slices, but I was wondering if there was another > way of doing the same thing, maybe reading the numbers in groups of > arbitrary length n... from http://docs.python.org/library/itertools.html#recipes def grouper(n, iterable, fillvalue=None): "grouper(3,

Re: How to create a virtual serial port?

On 2009-04-11, Scott David Daniels wrote: > Grant Edwards wrote: >> On 2009-04-11, Grant Edwards wrote: >> >>> You can write a port redirector in user-space in MS-Windows, >>> but you can't in Linux/Unix. On Unix systems you have to >>> write a kernel module that sits below the tty layer. >> >

Re: How to create a virtual serial port?

On 2009-04-11, Ned Deily wrote: > In article <6lgdnsbypsl1fx3unz2dnuvz_uqdn...@pdx.net>, > Scott David Daniels wrote: >> This part I actually understand. The OP has a program named >> "RouteBuddy" that talks to a device over a serial port, and he >> want to repalce the data stream coming from t

Re: How to create a virtual serial port?

A number of vendors (Keyspan, Belkin) make USB serial ports. FWIW, I use one here on this iMac and OS X with screen(1) and a null modem cable to act as a serial console for a headless Linux box. +1 -Alex Goretoy http://www.goretoy.com Norman Mailer

Q:Pythonic way to create list of lists

I am just learning Python. I am trying to create a list of empty lists: [[], [], [], ...] (10 items total). What is the most Pythonic way to do this? If I use a list comprehension (as in myList = [[] for item in xrange (0, 10)]), Netbeans warns me that 'item' is never used. If I use a for-loop

absolute newbie: divide a list into sublists (nested lists?) of fixed length

Hi, I have a list looking like [ 0.84971586, 0.05786009, 0.9645675, 0.84971586, 0.05786009, 0.9645675, 0.84971586, 0.05786009, 0.9645675, 0.84971586, 0.05786009, 0.9645675] and I would like to break this list into subsets of fixed length (say, three elements), i.e. to convert the list int

Re: Unsupported operand types in if/else list comprehension

On Apr 11, 3:03 pm, Mike H wrote: > Can I not use the cursor.execute command to pass variables that aren't > immediately next to each other? If so, is there a better way to go > about solving this problem? Yes, there is. Use one of the several production quality python SQL toolkits built for exa

Re: Q:Pythonic way to create list of lists

I am trying to create a list of empty lists: [[], [], [], ...] (10 items total). What is the most Pythonic way to do this? If I use a list comprehension (as in myList = [[] for item in xrange (0, 10)]), Netbeans warns me that 'item' is never used. Not using Netbeans, I can't verify that the be

  1   2   >