Re: Common Python Idioms

Marc 'BlackJack' Rintsch wrote: > If ``in`` shouldn't work with dictionaries, either `__contains__()` must > be implemented to throw an exception or dictionaries shouldn't be iterable. I agree completely (in the sense that dictionaries shouldn't be iterable directly). Probably even more strongly,

Re: Common Python Idioms

John Machin wrote: > No it doesn't look wrong to anyone who has read the docs on > sys.modules. My point was really that there is no obvious implementation for 'in' on dictionaries, so it should have been left out. And that GvR thought so for quite some time as well (until he got mixed up with

Re: Common Python Idioms

Duncan Booth wrote: > In this case, dict objects used to not support the 'in' operator, but at > some point it was added. I believe it wasn't there originally because Guido > wasn't sure whether people would expect it should match keys or keys and > values. And he was right: import sys 'sys' i

Re: Is python memory shared between theads?

Wesley Henwood wrote: > So I declare a variable named A in thread1, in script1.py. I assign > the value of 2.5 to A. I then run script2.py in thread2. Script2.py > assigns the value of 5.5 to a variable named A. Now, when thread1 > resums execution, I see that A = 5.5, rather than 2.5 as I expe

Re: Py3K idea: why not drop the colon?

Michael Hobbs wrote: > But if the BDFL insists that it remains, why not > take the converse approach? That is, assume that the expression ends at > the colon, not at the newline. That would make this type of statement > possible: I suggested something like this a while back. The answer then was

Re: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?

robert wrote: > (IPython is only a special "python network terminal" as already said.) Sorry, I thought of IronPython, the .NET variant. > Does Jython really eliminate the GIL? What happens when different Yes. > threads alter/read a dict concurrently - the basic operation in python, > which i

Re: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?

robert wrote: > Question Besides: do concurrent INC/DEC machine OP-commands > execute atomically on Multi-Cores as they do in Single-Core threads? No on the level that that Python reference counting is implemented. The CPUs have often special assembler ops for these operations. I think tha

Re: Exploiting Dual Core's with Py_NewInterpreter's separated GIL ?

robert wrote: > I'd like to use multiple CPU cores for selected time consuming Python > computations (incl. numpy/scipy) in a frictionless manner. > > Interprocess communication is tedious and out of question, so I thought > about simply using a more Python interpreter instances > (Py_NewInterp

Re: can't open word document after string replacements

Antoine De Groote wrote: > I have a word document containing pictures and text. This documents > holds several 'ABCDEF' strings which serve as a placeholder for names. > Now I want to replace these occurences with names in a list (members). I > open both input and output file in binary mode and

Re: Installing Python on a 64-Bit OS

Nico Grubert wrote: > I'd like to install Python 2.3.5. on a 64-Bit OS (Suse Linux Enterprise > Server 10) on an AMD Opteron 64-Bit machine. > I have to use Python 2.3.5. > > Do I need a special source archive or can I use "Python-2.3.5.tgz" from > http://www.python.org/ftp/python/2.3.5/Python-2

Re: threading support in python

Rob Williscroft wrote: > Daniel Dittmar wrote in news:[EMAIL PROTECTED] in > comp.lang.python: > > >>- removing reference counting and relying on garbage collection alone >>will break many Python applications (because they rely on files being >>closed at end of s

Re: threading support in python

km wrote: > Is there any PEP to introduce true threading features into python's > next version as in java? i mean without having GIL. > when compared to other languages, python is fun to code but i feel its > is lacking behind in threading Some of the technical problems: - probably breaks compati

Re: Beginner Textbook

M_M wrote: > I am looking for a simple text book to introduce 13 to 18 year olds to > python programming. Suggestion? If they're Germans: Python für Kids http://www.amazon.de/gp/product/3826609514/028-9407382-2771748?v=glance&n=299956 or Python Programming for the Absolute Beginner http://www.am

Re: CSV with comments

Sion Arrowsmith wrote: > Daniel Dittmar <[EMAIL PROTECTED]> wrote: >> if line [:1] == '#': > > What's wrong with line[0] == '#' ? (For one thing, it's fractionally > faster than [:1].) > Matter of taste. Occasionally, I use line

Re: Partial classes

Sanjay wrote: > Hi All, > > Not being able to figure out how are partial classes coded in Python. > > Example: Suppose I have a code generator which generates part of a > business class, where as the custome part is to be written by me. In > ruby (or C#), I divide the code into two source files.

Re: Coding style

Patrick Maupin wrote: > The argument that one should always use len() to test whether sequences > are empty or not simply because the use of len() gives a free "is it a > sequence?" type-check is not apt to be well received by an audience > which rejects explicit type-checking in general. No expli

Re: CSV with comments

GinTon wrote: > GinTon wrote: >> In csv.reader, is there any way of skip lines that start whith '#' or >> empty lines >> I would add comments at my CSV file > > For skip comment I get a dirty trick: > > reader = csv.reader(open(csv_file)) > for csv_line in reader: > if csv_line[0].startswith(

Re: Using Visual Slick Edit for Python

Brian Buderman wrote: > Anyone know if there is a way to make slickedit tag the built in modules > such as os and sys so that code completion and the like work? I don't think that this is possible as the docs are in the python executable. But it should be easy to generate a dummy module: import

Re: How to use ParseTuple with unknown number of args?

ondekoza wrote: > The earlier posts generally highlight some specific feature of calling > with arrays. Can someone point me to a piece of software, where sth. > like this is actually used? Python source/Objects/stringobject.c string_join would be an example if you only allow a list or tuple. Py

Re: running python from a memory stick?

John Salerno wrote: > Is there a way to 'install' and use Python on a memory stick, just as > you would on any computer? I use Windows, and I know the installation > does things with the registry, so probably I couldn't use the executable > file to install it. But is it possible to do it some ot

Re: Relying on the behaviour of empty container in conditional statements

horizon5 wrote: > Hi, > > my collegues and I recently held a coding style review. > All of the code we produced is used in house on a commerical project. > One of the minor issues I raised was the common idiom of specifing: > > > if len(x) > 0: > do_something() > > Instead of using the lang

Re: Questions about OSS projects.

bio_enthusiast wrote: > I was wondering how to go about starting an open source project for > doing routine biological problems? There is a plethora of scripts and > a fairly large biopython project to back up anyone who tried, these > however cater to the bioinformatics community and it loses the

Re: 'module' object has no attribute 'ssl'

Niurka Perez wrote: > ssl = socket.ssl(sock, self.key_file, > self.cert_file) > AttributeError: 'module' object has no attribute 'ssl' The socket module failed to import the _ssl module. And the ssl function gets only defined if _ssl could be imported. You probably haven't installed the Open

Re: Duplex communication with pipes - is possible ?

Dara Durum wrote: > Now I trying with packet size decreasing. Are PIPE-s can handle the > binary data packets, or I need to convert them with base64 ? In the client, you need to set the mode of sys.stdin to binary, otherwise, you get the DOS translation of linefeeds. See http://mail.python.org/pi

Re: XML, JSON, or what?

> My client-server is Python-to-Python. At present, I am using cPickle to > transfer objects between the two. Among other things, I sometimes > transfer a tuple. Using JSON it appears on the other side as a list. As > I sometimes use the tuple as a dictionary key, this fails, as you > obviously can

Re: Duplex communication with pipes - is possible ?

Dara Durum wrote: > Hi ! > > I want to create a Process Pool Object. > I can hold started processes, and can communicate with them. > > I tryed with many ipc methods, but every of them have bug or other problem. > Sockets are unavailabe (because Windows Firewall hold them). > > I think I will us

Re: DB-API: how can I find the column names in a cursor?

A.M wrote: > for row in out_cur: > > print row > [...] > > The other problem is accessing data in each row by column name. One useful technique is for col1, col2, col3 in out_cur: sum = sum + col3 Access is still by index, but your code uses ordinary Python variables. It works bett

Re: Is anybody knows about a linkable, quick MD5/SHA1 calculator library ?

DurumDara wrote: > Hi ! > > I need to speedup my MD5/SHA1 calculator app that working on > filesystem's files. You could try using threads. This would allow the CPU and the disk to work in parallel. The sha/md5 modules don't seem to release the global interpreter lock, so you won't be able to

Re: GUI issues in Python

[EMAIL PROTECTED] wrote: > Thanks Daniel, I really think that this should be the solution to my > problem. > > A quick Question...is wxPython Operating System dependent or it can be > used with anu OS like Linux, Windows and Mac ? > see http://www.wxpython.org/download.php#binaries Linux and Wi

Re: GUI issues in Python

[EMAIL PROTECTED] wrote: > I want to create a GUI where a user can select drag and drop kind of > boxes, circles and make connections between them. > > This is basically for depicting states and dependencies. I am writing a > program where I let the user input states and dependencies in a certain

Re: HTMLParser fragility

Lawrence D'Oliveiro wrote: > I've been using HTMLParser to scrape Web sites. The trouble with this > is, there's a lot of malformed HTML out there. Real browsers have to be > written to cope gracefully with this, but HTMLParser does not. Not only > does it raise an exception, but the parser obje

Re: Python and microsoft outlook-using com, can I interact with msoutlook?

[EMAIL PROTECTED] wrote: > Hi All, > I know that Microsoft Exchange has a com interface, CDO, but I can't seem to > find one for Microsoft outlook. > does anyone have code snippets for using msoutlook and python, or > suggestions? You can use CDO to manage your Inbox, send mail etc. The following

Re: import random module

DataSmash wrote: > Hi, > When I import the random module at the python interpreter, it works > fine: import random x = random.randint(1,55) print x > 14 > > BUT, when I put the same code in a python script: > * random.py: > > import random > > x = random.randint(1,55) > print x >

Re: global, globals(), _global ?

Roy Smith wrote: > In article <[EMAIL PROTECTED]>, > robert <[EMAIL PROTECTED]> wrote: > >> Using global variables in Python often raises chaos. Other languages use >> a clear prefix for globals. > > Unsing globals raises chaos in any language. They should be shunned and > avoided. Solution:

Re: Module written in C does not repond to Ctrl-C interruption.

Bo Peng wrote: > Daniel Dittmar wrote: > >> >> You could set up your own signal handler when entering the C >> extension. This should abort the extension (tricky) and call the >> Python signal handler. > > > This can be done under linux using things in

Re: Module written in C does not repond to Ctrl-C interruption.

Diez B. Roggisch wrote: > """ > Although Python signal handlers are called asynchronously as far as the > Python user is concerned, they can only occur between the ``atomic'' > instructions of the Python interpreter. This means that signals arriving > during long calculations implemented purely in

Re: Using repr() with escape sequences

nummertolv wrote: > - Consider a string variable containing backslashes. > - One or more of the backslashes are followed by one of the letters > a,b,f,v or a number. > > myString = "bar\foo\12foobar" > > How do I print this string so that the output is as below? > > bar\foo\12foobar > > typing

Re: Add a month

Fredrik Lundh wrote: > [EMAIL PROTECTED] wrote: > >> Hi, this is probably a really simple question but... >> How do you add a month to a datetime date in python? It would be nice >> if you could do something like: >> >> d = datetime.date(2006,2,17) >> dm = datetime.timedelta(months=1) >> d_new =

Re: low level data types

dementrio wrote: > Thanks for the hint! > > However now I have another problem - endianness (the client runs on > powerpc, the server on x86). I found that simply reversing the stuff I > recv() works, but is there any cleaner way for taking care of this? > http://docs.python.org/lib/module-struc

Re: Sharing database connection from C to Python

[EMAIL PROTECTED] wrote: > I'm developing an application using the C language and Python for it's > plugins. The C program connects to a MySQL database and keeps that > connection active. Is it possible to 'share' this connection with the > Python plugins? If so, is there a "standard" way to do tha

Re: DB API and thread safety

Robin Haswell wrote: > Hey guys > > I've been reading http://www.python.org/peps/pep-0249.html and I don't > quite get what level of thread safety I need for my DB connections. > > If I call db = FOOdb::connect() at the start of my app, and then every > thread does it's own c = db.cursor() at the

Re: Multiple modules with database access + general app design?

Frank Millman wrote: > I have subclassed threading.Thread, and I store a number of attributes > within the subclass that are local to the thread. It seems to work > fine, but according to what you say (and according to the Python docs, > otherwise why would there be a 'Local' class) there must be s

Re: Multiple modules with database access + general app design?

Robin Haswell wrote: > Ah I see.. sounds interesting. Is it possible to make any module variable > local to a thread, if set within the current thread? Not directly. The following class tries to simulate it (only in Python 2.4): import threading class ThreadLocalObject (threading.local): d

Re: Multiple modules with database access + general app design?

Robin Haswell wrote: > On Thu, 19 Jan 2006 14:37:34 +0100, Daniel Dittmar wrote: >>If you use a threading server, you can't put the connection object into >>the module. Modules and hence module variables are shared across >>threads. You could use thread local storage,

Re: Multiple modules with database access + general app design?

Robin Haswell wrote: > cursor for every class instance. This application runs in a very simple > threaded socket server - every time a new thread is created, we create a > new db.cursor (m = getattr(modules, module)\n m.c = db.cursor() is the > first part of the thread), and when the thread finishe

Re: Windows and python execution

Tim Roberts wrote: > Mark Carter <[EMAIL PROTECTED]> wrote: >>What you need to do is include the following line in autoexec.bat: >>set .py=c:\python24\python.exe >> >>This will achieve the desired result. I'm suprised more people don't use it. > > > They don't use it, because it doesn't do anythi

Re: Aproximative string matching

javuchi wrote: > I'm searching for a library which makes aproximative string matching, > for example, searching in a dictionary the word "motorcycle", but > returns similar strings like "motorcicle". > > Is there such a library? > agrep (aproximate grep) allows for a certain amount of errors and

Re: initialising a list of lists

Peter Kleiweg wrote: > This does not what I want it to do: > > >>> a = [[]] * 6 > >>> a[3].append('X') > >>> a > [['X'], ['X'], ['X'], ['X'], ['X'], ['X']] > > This does what I want: > > >>> b = [[] for _ in range(6)] > >>> b[3].append('X') > >>> b > [[], [], [],

Re: D foreach

[EMAIL PROTECTED] wrote: > The Digital Mars D compiler is a kind of "improved c++", it contains a > "foreach" statement: > http://www.digitalmars.com/d/statement.html#foreach > > Usage example: > foreach(int i, inout int p; v1) p = i; > > Is equal to Python: > for i in xrange(len(v)): v[i] = i [.

Re: Why the nonsense number appears?

Johnny Lee wrote: print time1, time2 > > 1130748744.461 1130748744.500 > float(time2) - float(time1) > > 0.03934332275391 > > >Why are there so many nonsense tails? thanks for your help. http://en.wikipedia.org/wiki/Floating_point#Problems_with_floating-point, especially 'Rou

Re: Absolultely confused...

Jeremy Moles wrote: > So, here is my relevant code: > > PyArg_ParseTuple(args, "O!", &PyType_vector3d, &arg1) > > And here ismy error message: > > argument 1 must be pylf.core.vector3d, not pylf.core.vector3d > It looks as if two PyType_vector3d exist in your system - the one that

Re: Question about smtplib, and mail servers in general.

Chris Dewin wrote: > Hi. I've been thinking about using smtplib to run a mailing list from my > website. > > s = smtplib.SMTP("server") > s.sendmail(fromaddress, toaddresess, msg) > > I know that in this instance, the toaddresses variable can be a variable > of type list. > > Suppose the list c

Re: Windows paths, Java, and command-line arguments, oh my!

Steve M wrote: About your main problem: I'm still convinced that it's the order of -jar and -D that is important, see my other post. > I have tried (not entirely systematically but pretty exhaustively) > every combination of backslashes in the cmd string, e.g.: > -Dsalesforce.config.dir=c\:\\co

Re: Windows paths, Java, and command-line arguments, oh my!

Steve M wrote: > I'm trying to invoke a Java command-line program from my Python program > on Windows XP. I cannot get the paths in one of the arguments to work > right. > > The instructions for the program describe the following for the > command-line arguments: > > java -jar sforcedataloader.ja

Re: How to write this iterator?

[EMAIL PROTECTED] wrote: > Given a list of iterators, I'd like to have a new one that would > cyclically walk over the list calling the next() method of the iterators > (removing any iterator which is exhausted). It should also support adding > a new iterator to the list; it should be added in f

Re: packaging python for install.

J wrote: > I have created an App that embedds the python interpreter and I am > now in the process of creating an installer. I am currently linking > python24.lib, but it is only 184k and I suspect that it imports other > dlls... I am also using numarray. Does anyone have any experiences in > packa

Re: re module help

[EMAIL PROTECTED] wrote: > if I start replacing regex by re I get stuck at replacement of >regex.symcomp() and regex.pattern() Groups identified by names are part of the standard regular expression syntax: regex.symcomp ('\([a-z][a-z0-9]*\)') becomes re.compile ('(?Pid[a-z][a-z0-9]*)') I get

Re: warning when doubly liked list is defined globally

chand wrote: > Hi., > > In my api.py file 'g_opt_list' is defined globally > g_opt_list =[[],[],[],[],[],[],[]] > > when I run the py file, I am getting the Following Error > > SyntaxWarning: name 'g_opt_list' is used prior to global declaration g_del_opt_list =[[],[],[],[],[],[],[]] #g_opt_lis

Re: what's the difference between *.dll and *.pyd if both of them are extended python module?

wen wrote: > 1. what's the difference between them? i saw the code is same as common c++ > extended python module, can i use microsoft visual C++ to create a dll > project for compiling it as _cmd.dll? .pyd is just a naming convention. It was probably introduced to prevent name clashes with unrel

Re: loop in python

km wrote: > Why is it that the implementation of empty loop so slow in python when > compared to perl ? [...] > Is python runtime slow at all aspects when compared to perl ? No > I really wonder what makes python slower than perl ? It could be that the Perl compiler recognizes such a for loo

Re: len(sys.argv) in (3,4)

Daniel Schüle wrote: > if __name__ == "__main__": > if len(sys.argv) not in (3,4): > print "usage: prog arg1 argv2 [-x]" > # etc ... > > while develeoping I had my interpeter running and reloaded module > now since I am ready, I wanted to run it from cmd windows shell > but it alwa

Re: how to write thread-safe module ? and pytz

nicolas_riesch wrote: > Does someone know if the module pytz > (http://sourceforge.net/projects/pytz/) is thread-safe ? > I have not seen it explicitely stated, and just wanted to be sure, as I > want to use it. > > That's because in the file pytz/tzinfo.py, I see global variables > _timedelta_cac

Re: API class creation

kman3048 wrote: > Hello, > > as a relative newcomer to Python API programming I've got a problem: > > To extend Python: > - there is an API C call to create a module > - there is also a API C call to create a method > - there is an API C call to create a Class instance > > Now, I need to create

Re: Dabo in 30 seconds?

Jorge Godoy wrote: > I agree where you say that lack of information is a risk. But I don't see > how it -- lack of information -- wouldn't affect both scenarios. At least, Because you put different probabilities on different outcomes. One easy 'risk markup' would be to assume that parts of the

Re: Dabo in 30 seconds?

Jorge Godoy wrote: > We can find several problems, almost all of them can be solved with the > admin's creativity. You must distinguish between solving technical problems once a course has ben set and choosing such a course in the first place. The latter has to deal also with the risks of the

Re: Dabo in 30 seconds?

Cliff Wells wrote: > I can understand this, but from my experience, their concerns are badly > misplaced: I recently wrote a fairly sizable Python app (~8K LOC) that > utilized several 3rd party python librarys: wxPython, Twisted, > FeedParser, DateUtils and SQLite to name a few off the top of my

Re: Dabo in 30 seconds?

Jorge Godoy wrote: > Daniel Dittmar wrote: > > >>To be fair to those slothes: some of them want to write software for a >>commercial setting where they have to install it on other peoples >>machines. So it isn't just getting it to work one one own's machine.

Re: Dabo in 30 seconds?

Cliff Wells wrote: > But then I'm willing to > actually work a little to get what I want. For other it seems they > won't be happy unless you drive to their house and install it for them To be fair to those slothes: some of them want to write software for a commercial setting where they have to

Re: Ten Essential Development Practices

Dark Cowherd wrote: > There should be one-- and preferably only one --obvious way to do it. > > But this not true of Python. > GUI, Web development, Application Framework - it is shambles. It is so That's because there is no *obvious* way to do these. > -Quote - Phillip J. Eby from dirtsimple.o

Re: Rich Graphics?

Chris Spencer wrote: > I'm trying to write a Gui in Python for manipulating rich graphical > representations, similar to something like Inkscape. I've tried tkinter, > wxPython, pyGtk, and while they all do traditional widgets well enough, > none of them really handle anti-aliased, transparent,

Re: PEP on path module for standard library

Terry Reedy wrote: > for dir in pathobject: > if isdir(dir): cd(dir) > > *is*, in essence, what the OS mainly does with paths (after splitting the > string representation into pieces). That's why there is rarely a need to to it in Python code. > Directory walks also work with paths as sequenc

Re: PEP on path module for standard library

John Roth wrote: > However, a path as a sequence of characters has even less > meaning - I can't think of a use, while I have an application That's true. But the arguments for path objects as strings go more in the direction of using existing functions that expect strings. > where traversing a

Re: Extending python - undefined symbol error on import

ch424 wrote: > However, when I open up the python command line, and type "from gpib > import *" or "import gpib" I get "ImportError: /usr/.../gpibmodule.so: > undefined symbol: ibdev" -- but I know it's defined in the ni488.h > file, especially as I can use this code from actual C programs without

Re: PEP on path module for standard library

Duncan Booth wrote: > I would have expected a > path object to be a sequence of path elements rather than a sequence of > characters. Maybe it's nitpicking, but I don't think that a path object should be a 'sequence of path elements' in an iterator context. This means that for element in pa

Re: is a file open ?

luis wrote: > for root, dirs, files in os.walk(path): >for file in files: > # ¿ is opened ? On Linux and some other Unixes, you can probably read the /proc filesystem. On Windows, you'll probably get the quickest result by running handle.exe (http://www.sysinternals.com/Utilities/Handl

Re: automatic form filling

> I would like to know how I could automatically fill a > (search) form on a web page and download the resulting > html page. http://wwwsearch.sourceforge.net/ClientForm/ Daniel -- http://mail.python.org/mailman/listinfo/python-list

Re: pyo contains absolute paths

David Siroky wrote: > When I "compile" my python files with "python -OO " into pyo files > then they still contain absolute paths of the source files which is > undesirable for me. How can I deal with that? Use the script compileall.py (in Lib) to compile all the files. This script has an opt

Re: Use cases for del

Scott David Daniels wrote: > Testing for None should be an is-test (not just for speed). In > older pythons the == result wasn't necessarily same as is-test. > This made sense to me after figuring out NULL in database stuff. NULL in SQL databases has nothing to do with Python None. I'm quite sure

Re: python nested class

Vedanta Barooah wrote: > in a python nested class is it possible to change the value of the > parent class's variable without actually creating an instance of the > parent class Python nested classs are like *static* Java nested classes. Non-static Java classes are very different in that they hav

Re: Use cases for del

Peter Hansen wrote: > Arguing the case for del: how would I, in doing automated testing, > ensure that I've returned everything to a "clean" starting point in all > cases if I can't delete variables? Sometimes a global is the simplest > way to do something... how do I delete a global if not wit

Re: Modules for inclusion in standard library?

Rocco Moretti wrote: >>> Except that (please correct me if I'm wrong) there is somewhat of a >>> policy for not including interface code for third party programs which >>> are not part of the operating system. (I.e. the modules in the >>> standard libary should all be usable for anyone with a defau

Re: Question about Python

Jan Danielsson wrote: >But then it occured to me.. I started writing my program in Java > pre-1.5. Then came 1.5, I upgraded, and my program would still compile > and run, though I did get three warnings. The language had changed a > little bit; I had to assign a type to three arrays. That wasn

Re: Python syntax high-lighting and preservation on web

Gregory Piñero wrote: > Hey guys, > > Does anyone know where I can pick up a style sheet (css) and/or other > files/programs I might need to display python code on my website with > tab preservation(or replace with spaces) and colored syntax? I want > something similar to the python code on a pag

Re: Which kid's beginners programming - Python or Forth?

[EMAIL PROTECTED] wrote: > List comprehensions, however, *are* the basic control flow; loops are > much more verbose and they should be used only when necessary. List comprehensions are probably a bad idea for entry level programmers: - for and while loops are much easier to debug as you can inser

Re: Which kid's beginners programming - Python or Forth?

BORT wrote: > I told my son, who wants to learn how to compute probabilities, that we > have to start with some boring stuff so we can learn how to do the cool > stuff. Adding and subtracting aren't really fun, but figuring odds on > rolling dice IS fun. Learning to program will be kind of like t

Re: PEP ? os.listdir enhancement

Riccardo Galli wrote: > On Thu, 23 Jun 2005 11:34:02 +0200, Andreas Kostyrka wrote: > > >>What's wrong with >> >>(os.path.join(d, x) for x in os.listdir(d)) >> >>It's short, and easier to understand then some obscure option ;) >> >>Andreas > > > how does it help in using list comprehension, as

Re: PEP ? os.listdir enhancement

Riccardo Galli wrote: > On Thu, 23 Jun 2005 12:56:08 +0300, Konstantin Veretennicov wrote: >>What about os.listdir(dir='relative/path', abs=True)? Should listdir call >>abspath on results? Should we add another keyword rel? Would it complicate >>listdir unnecessarily? > > keyword dir not exists (d

Re: *Python* Power Tools

Micah wrote: > Anyone know if there is any organized effort underway to implement the > Python equivalent of "Perl Power Tools" ? > > If not, would starting this be a waste of effort since: > > - it's already being done in Perl? > - cygwin thrives? > - UNIX is already pervas

Re: Multiple instances of a python program

Rahul wrote: > Hi. > I am part of a group in my univ where we organize a programming > contest. In this contest we have a UDP based server. The server > simulates a game and each contestant is to develop a team of virtual > players. Each team is composed of 75 similar bots...i.e. governed by > the

Re: Which Python Wiki engine?

Kenneth McDonald wrote: > I'm looking for a Wiki engine to set up for my company, so that we can > incrementally add user documentation for a fairly complex program, plus > allow users to add their own comments for the benefit of others. I'd > strongly prefer a Python-based Wiki, since that

Re: MySQLDBAPI

Gregory Piñero wrote: > building '_mysql' extension > gcc -pthread -shared build/temp.linux-i686-2.4/_mysql.o -lz > -lmysqlclient_r -o build/lib.linux-i686-2.4/_mysql.so > /usr/bin/ld: cannot find -lmysqlclient_r > collect2: ld returned 1 exit status > error: command 'gcc' failed with exit status 1

Re: MySQLDBAPI

Gregory Piñero wrote: > Is that something I can install all to my home directory? If you have a similar Linux distribution at home, simply build the mysql extension on that machine and then copy it to the web server. Otherwise: You don't have to actually install it. Just make sure that Setup.py

Re: lists in cx_Oracle

Andrew Dalke wrote: > It sounds like you're saying that the interface is actually implemented > by passing the execute string and a database-specific dictionary-like > object; the latter created by the DB-API interface. That's the way it's supposed to work. The program prepares a statement with p

Re: lists in cx_Oracle

Andrew Dalke wrote: > I want to execute a query with an "IN" in the WHERE clause > and with the parameter taken from a Python variable. That > is, I wanted something like this to work > > id_list = ["AB001", "AB002", "AB003"] > > c.execute("""SELECT s.smiles FROM smiles_database s WHERE """ >

Re: Getting into Python, comming from Perl.

Miguel Manso wrote: I've tryed to use python some times but I get frustrated very quick. I get myself many times needing to figure out how to loop through a list, declare an associative array, checking how to pass named parameters to functions, and simple things like that. Create a cheat sheet w

Re: Case-insensitive dict, non-destructive, fast, anyone?

Ville Vainio wrote: "Daniel" == Daniel Dittmar <[EMAIL PROTECTED]> writes: Daniel> Ville Vainio wrote: >> I need a dict (well, it would be optimal anyway) class that >> stores the keys as strings without coercing the case to upper >> or lower

Re: Case-insensitive dict, non-destructive, fast, anyone?

Ville Vainio wrote: I need a dict (well, it would be optimal anyway) class that stores the keys as strings without coercing the case to upper or lower, but still provides fast lookup (i.e. uses hash table). Store the original key together with the value and use a lowercase key for lookup. only a

Re: Optimisation Hints (dict processing and strings)

OPQ wrote: - Try if it isn't faster to iterate using items instead of iterating over keys items are huge lists of numbers. keys are simple small strings. And even if it is faster, how can I find the key back, in order to delete it ? for v in hashh.items(): if len(v)<2: del ???

Re: Optimisation Hints (dict processing and strings)

OPQ wrote: for (1): longone=longone + char # where len(char)== 1 I known that string concatenation is time consuming, but a small test on timeit seems to show that packing and creating an array for those 2 elements is equally time consuming - use cStringIO instead - or append all chars to a list

Re: The Running Time of += on Char Strings ?

Edg Bamyasi wrote: What is the running time of conactination on character strings. i.e. joe="123" joe+="9" is it Amortized Constant time? I don't think it would be O((number of chars)^2) but i really don't know. Strings are immutable, so joe+="9" is executed as joe

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