Re: Can I use python for this .. ??
"placid" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] .) > > When you hibernate/boot up/hibernate for a long time without a clean > reboot, Windows becomes unstable... This seems to depend on the system. I have gone at least a week, maybe two, with nightly hibernations and no problems. Maybe you meant much longer than that. But installs and updates often require reboots anyway. tjr -- http://mail.python.org/mailman/listinfo/python-list
Re: Can I use python for this .. ??
Petr Jakes wrote: > Why using Python? > What about? > 1. Open Power Options in Control Panel. (Click Start, click Control > Panel, and then double-click Power Options.) > 2.Click the Hibernate tab, select the Enable hibernate support check > box, and then click Apply. > (If the Hibernate tab is unavailable, your computer does not support > this feature.) When you hibernate/boot up/hibernate for a long time without a clean reboot, Windows becomes unstable... > > then: > 1: Click Start and Shut Down, > 2: Point the standby button and maintain the shift key pushed, > 3: A new hibernation button appears: click it while still holding the > shift key: voila your PC will hibernate (it mens computer will save > your current setting and will switch off). > > Petr Jakes -- http://mail.python.org/mailman/listinfo/python-list
Re: Swaying A Coder Away From Python
"Tim Williams" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > idea how large its user-base is. As I said, the email was forwarded > to someone who thought I would be interested. Well, it got Fredrik to post the link to a really nice intro to Django, which I had not seen before. So thanks to you both ;-) tjr -- http://mail.python.org/mailman/listinfo/python-list
Re: Tuple assignment and generators?
Larry Bates wrote: > You must be careful with this as they all point to > exactly the same object. Example: > > >>> q = r = s = t = u = v = 0 > >>> id(q) > 3301924 > >>> id(r) > 3301924 > >>> id(s) > 3301924 But: >>> q = 0 >>> r = 0 >>> s = 0 >>> id(q) 134536636 >>> id(r) 134536636 >>> id(s) 134536636 [snip] > My rule, don't do it unless you know exactly why you > want to do it. It will trip you up at some point and > be VERY hard to find. It's ok to do it with constant objects, really. Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
Re: Using time.sleep() in 2 threads causes lockup when hyper-threading is enabled
[Tim Peters] >> I didn't run it for hours ;-) [EMAIL PROTECTED] > Please try. OK, I let the first test program run for over 24 hours by now. It never hung. Overnight, the box did go into sleep mode, but the test woke itself up after sleep mode ended, and the threads reported they were sleeping for about 8 hours then. I did this under a debug build of Python, so that if it did hang I'd have _some_chance of getting useful info from the VC 7.1 debugger. It's possible (but unlikely) that using a debug-build Python prevented a hang that would have occurred had I used a release-build Python. > The sleep statement does not return! And this should not happen. The > code above does nothing special or unusual. The problem only occurs if > 2 threads use the sleep statement and hyper-threading is enabled. > > We discovered this bug perhaps a year ago. The only solution was to > tell our customers to disable hyper-threading (you can imagine they did > not like our "solution" very much). It then took many days of hard > work to isolate the problem down to the code I posted above. As before, since Python merely calls the Win32 API Sleep() function, it's extremely unlikely that the problem is due to Python. It's quite possible that the problem is due to a tiny timing hole in MS's implementation of Sleep(). Since I don't have the source code for that, and disassembling is prohibited by my license ;-), I can't pursue that. I've seen software with honest-to-God thread-race bugs that were never reported across years of heavy production use, until a user tried the code on a hyper-threaded or multi-core box. Tiny timing holes can be _extremely_ shy, and running on a box with true, or even just finer-grained (like HT), concurrency can make them much more likely to appear. I've never seen a software failure with (eventually) known cause occur on an HT box that could not have happened on a non-HT box. The statistics of extremely unlikely events aren't a natural fit to the unabused human mind ;-) > ... > Once the application locks up (getting stuck in a sleep statement) all > comes back to live if I pull the network cable out. So perhaps the > socket thread returns from the sleep statement and other threads return > to live because they were waiting for the socket thread. That's peculiar. time.sleep() called from a thread other than the main thread on Windows is non-interruptable (because the Windows Sleep() function is non-interruptable). time.sleep() called from the main thread on Windows _is_ interruptable: the main thread uses the Win32 API WaitForSingleObject() instead, passing a handle to a custom interrupt event; the _intent_ is so that a time.sleep() in the main thread can be aborted by a keyboard interrupt. But it shouldn't be possible for anything other than a keyboard interrupt or a normal (timeout) return to knock that loose. So if unplugging the cable knocks things lose, that just points even stronger at a bug in the Windows kernel. > Our software runs on both Windows and Linux. We are not sure if the > problem also happens on Linux. Well, I ran your test for a day on my Windows box -- you try running it for a week on your Linux box ;-) > ... > We have searched the Internet far and wide and were not able to find > any information that indicates that someone else has reported a similar > problem (neither Python nor Windows Sleep related). I'm pretty sure I would have known about it if anyone reported such a Python bug in the last 15 years. But this is the first time I've heard it. I don't keep up with Microsoft bug reports at all. -- http://mail.python.org/mailman/listinfo/python-list
Re: cross platform libraries
No! That's not the way things work. Such code needs to run locally (in this case, Windows). You can run this program as a daemon on Windows with some nice simple remote interface (Eg: xmlrpc) and send a message to trigger the shutdown. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question on code vetting
I have no deep connections to any open source projects. I do however know quite a few engineers. Bear that in mind. [EMAIL PROTECTED] wrote: > It seems to me that Open Source generally would be more pervasive if there > was more transparency with respect to the practices observed within the > projects. What possible harm could there be in letting the world know how > decisions to incorporate code are reached? I don't think it's a question of transparency but effort. Documenting the processes takes time which many probably feel is better spent on functional aspects of the project. And for what benefit? Are open source projects more concerned about approval or quality? Besdies, most commercial products have zero transparency in their development processes and it doesn't hinder their market acceptance. > The goal of collaborative > development is to build a body of code with many minds that is better than > the body of code that could be built by any subset of them. The same > principle could be applied to identification of best practices for > committers across projects. If those practices are identifiable and repeatable, then sure, maybe projects could be more productive following a "best practices" approach. OTOH if successful projects function more as little fiefdoms run by benevolent dictators, the reasons for success may be too idiosyncratic and happenstance to translate to other projects. Note I said more productive, as in allow the code to improve quicker. My impression is most engineers don't want to invest time on IP rules and hate when legal shenanigans impinge on their development. They're generally good at providing attribution and avoiding intentional misuses, but won't go out of their way to check sources. Nor should they, as 1) that's not their job and 2) it's a very difficult task (unless you know of some master database containing all the world's code). Hence IP verification "best practices" are likely to be summarily ignored as a foolish waste of time. Closed commercial projects fare no better, indeed they may be even worse since the risk of getting caught is lower. Google for the number of times unlicensed GPLed code turned up in some commercial product. > To me, being unable to reach an understanding > of the practices is analogous to being unable to see and run the JUnit > suites on a bunch of classes - being in the position of assuming that > there is coverage, but not being able to understand how much or how > thorough. Transparency can be valuable to an outsider, but I don't see how most projects would have the time, resources, or inclination to provide it. > I think it is obvious that if every consumer of the code who has an > interest in controlling risk has to reinvent the wheel, there will be a > lot of effort wasted on redundant work. Sure, but this task is better handled by vendors like Red Hat than by individual projects. IP verification is no easy matter to handle, and vendors have a financial incentive to perform the checks. Vendors can also offer indemnity, which individual projects can't. > Why not have the project publish a > document that says "here are the practices by which we manage our code > base - take it or leave it". Just as most licenses are variations on a few > (GPL, LGPL, CPL, etc.), it seems to me that very quickly, a set of common > management practices would evolve if most projects published, perhaps with > a few variations. I suspect part of the reason you have trouble finding answers about IP issues is that there are none to give. I doubt most projects follow anything resembling a formal process for verifying sources. It's more likely left up to individual contributors, and probably runs along the lines of "if it doesn't look obviously ripped-off, then it's ok". > With regard to the issue of trust, how can I either trust or decide not to > trust in an information vacuum? By looking at indirect sources of evidence. How much trust do others put in this project? (Google for one uses python heavily.) How do most open source projects function? How do most engineers handle IP issues? Can I hire an auditor to sample a representative portion of the code base for IP issues? Has anyone else already done so? How often are open source projects accused of IP violations? How serious are they and what are the outcomes? Do closed projects handle things any differently? What assurances do they really provide? Risk analysis means there's risk. Unknowns are inherent. Work around them the best you can. > I may be splitting hairs, but my > understanding is that belief despite absence of evidence is faith, not > trust. Trust is the result of observation, and I want to be able to > observe. Faith is a belief that something is true without evidence. Trust is relying on something/someone to perform a certain way. Blindly believing a project to be free of IP issues is faith. Expecting the committers to take the sam
Re: Using time.sleep() in 2 threads causes lockup when hyper-threading is enabled
Marc > IIRC it was something like an NTP daemon that caused the clock to "jump" a > little and (Window's) sleep was confused. The problem is not a "jump" but a permanet lockup of the sleep statement. To all others, is there nobody out there that could run the test code at the beginning of this post on a hyper-threading CPU? Olaf -- http://mail.python.org/mailman/listinfo/python-list
Re: using urllib with ftp?
Fredrik Lundh wrote: > John Salerno wrote: > >> I've tried this already and it seems to work, but I'm curious if it's >> okay to use urllib when trying to access a url that begins with ftp:// >> instead of http://. Does this matter? It's only a text file, so it's not >> really an FTP server I'm accessing, I don't think. I wasn't sure if >> using ftplib would be overkill in this case, or if you even could use it >> at all if you just want to get the page itself (the txt file). > > from the urllib documentation: > > Currently, only the following protocols are supported: HTTP, > (versions 0.9 and 1.0), Gopher (but not Gopher-+), FTP, and > local files. Thanks. So the ftp:// is something different than actually using ftplib to connect to an FTP server, right? I've used both urllib and ftplib, so I know what they do, I just was a little unclear about whether they can sometimes do each other's work as well. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question on code vetting
<[EMAIL PROTECTED]> writes: > I hope the following message will not result in scorn being heaped > upon me. We try to heap scorn not upon individuals, but upon scorn-worthy ideas. Also, we heap scorn upon people who heap their responses on top of the quoted material. Please don't top-post. > It seems to me that Open Source generally would be more pervasive if > there was more transparency with respect to the practices observed > within the projects. You mean like publicly-accessible and archived developer discussion forums? Bug tracking systems which anyone can submit to? Source code with copyright statements and license grants directly in the files for anyone to examine? Who is it that needs to improve their transparency, again? I would love for all software vendors to be held to this standard. Are you suggesting your organisation expects some higher level of transparency from free software, when it happily accepts a far lower level of transparency from proprietary vendors? (good sigmonster, have a biscuit) -- \"The right to search for truth implies also a duty; one must | `\ not conceal any part of what one has recognized to be true." | _o__) -- Albert Einstein | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Tuple assignment and generators?
[EMAIL PROTECTED] writes: > There is only one zero in Python! It can never change! +0.5 QOTW -- \"Madness is rare in individuals, but in groups, parties, | `\ nations and ages it is the rule." -- Friedrich Nietzsche | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: Gettings subdirectories
Florian Lindner wrote:
> how can I get all subdirectories of a given directories?
If you're not adverse to a solution outside of the standard lib, I
highly recommend the 'path' module:
>>> from path import path
>>> c = path("C:\\")
>>> c.dirs()
[path(u'C:\\cmdcons'), path(u'C:\\Config.Msi'), path(u'C:\\Logon'),
path(u'C:\\Program Files'), path(u'C:\\Python24'),
path(u'C:\\RECYCLER'), path(u'C:\\System Volume Information'),
path(u'C:\\WINDOWS'), path(u'C:\\WINSRC')]
http://www.jorendorff.com/articles/python/path/
Hope this helps.
- alex23
--
http://mail.python.org/mailman/listinfo/python-list
RE: Newbie question on code vetting
[EMAIL PROTECTED] wrote: > It seems to me that Open Source generally would be more pervasive if > there was more transparency with respect to the practices observed > within the projects. You mean something like: http://www.python.org/dev/ Tim Delaney -- http://mail.python.org/mailman/listinfo/python-list
whois info from Python?
I'm looking to get whois information for a given domain from Python. I'm mostly interested in record update and creation dates at the moment, but eventually might want more. I stumbled upon a couple modules/programs: rwhois.py and whois.py but neither seems to work. I can clearly issue a whois command directly, but I'm hoping there's some module out there that will do the domain-to-whoisserver mapping and all the output parsing for me. Any candidates other than the two I've found so far? Thx, Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: Swaying A Coder Away From Python
Adam Jones: """ User error, evidently. Sometimes the interface is more intelligent than its user, and every time this happens the interface is the one that gets the bad rap. """ Well that certainly explains my problems with Eclipse. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question on code vetting
All, I hope the following message will not result in scorn being heaped upon me. I know this is not a particularly fascinating topic for developers, but I believe it is worth pursuing. It seems to me that Open Source generally would be more pervasive if there was more transparency with respect to the practices observed within the projects. What possible harm could there be in letting the world know how decisions to incorporate code are reached? The goal of collaborative development is to build a body of code with many minds that is better than the body of code that could be built by any subset of them. The same principle could be applied to identification of best practices for committers across projects. Just as the code must be available so that it can be inspected, improved and extended, so should the practices, for essentially the same reason. To me, being unable to reach an understanding of the practices is analogous to being unable to see and run the JUnit suites on a bunch of classes - being in the position of assuming that there is coverage, but not being able to understand how much or how thorough. I think it is obvious that if every consumer of the code who has an interest in controlling risk has to reinvent the wheel, there will be a lot of effort wasted on redundant work. Why not have the project publish a document that says "here are the practices by which we manage our code base - take it or leave it". Just as most licenses are variations on a few (GPL, LGPL, CPL, etc.), it seems to me that very quickly, a set of common management practices would evolve if most projects published, perhaps with a few variations. With regard to the issue of trust, how can I either trust or decide not to trust in an information vacuum? I may be splitting hairs, but my understanding is that belief despite absence of evidence is faith, not trust. Trust is the result of observation, and I want to be able to observe. Thanks for the info on the Cheese Shop. That helps. If there is any interest in learning about it within this group, I can supply some related info from the Eclipse project. Regards, Bill "Robert Kern" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > [EMAIL PROTECTED] wrote: > > Hi. > > > > I have visited the Python web site and read some information on who the > > commiters are and how to go about submitting code to them, but I have not > > been able to locate any information regarding the process for vetting the > > code to identify any possible IP infringement before it is committed. How do > > the committers ascertain the originality of the code before it becomes part > > of the base? > > They tell themselves very sternly not to commit code that isn't appropriately > licensed. > > > Is there any use of tools like BlackDuck ProtexIP or the > > competing Palamida product to scan for matches to code that is already > > licensed elsewhere? > > No. > > > Also, is the same or a different standard of IP assurance practiced for the > > Cheese Shop? > > There is no vetting for the Cheese Shop. Anyone can post packages there. If some > illegal-to-redistribute code is discovered, it will probably be removed by the > administrators. This hasn't come up, yet, I don't think. > > If you want the code to be vetted, you have to do it yourself. Besides, if you > don't trust the commiters and the package authors not to infringe on other > peoples' IP, why do you trust them to report infringement? > > -- > 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: Tuple assignment and generators?
> Zero, in particular, is the same variable all throughout a Python interpreter. For the sake of accuracy let me note that I ought to have said, "is the same *value* all throughout a Python interpreter." Jeremy -- http://mail.python.org/mailman/listinfo/python-list
Re: Tuple assignment and generators?
Larry Bates wrote: > Just wrote: > > In article <[EMAIL PROTECTED]>, > > Larry Bates <[EMAIL PROTECTED]> wrote: > > > >> While I have never needed anything like this in my 5 years of Python > >> programming, here is a way: > >> > >> a,b,c = 3*[0] > >> q,r,s,t,u,v = 6*[0] > > > > This is (IMO) fairly idiomatic: > > > >a = b = c = 0 > >q = r = s = t = u = v = 0 > > > > Just > > You must be careful with this as they all point to > exactly the same object. Example: > > >>> q = r = s = t = u = v = 0 > >>> id(q) > 3301924 > >>> id(r) > 3301924 > >>> id(s) > 3301924 > >>> > > Notice that all of them point to exactly the same object, > not 6 copies of zero which is "probably" what the poster > was thinking. Numbers are immutable. They're never copied. Zero, in particular, is the same variable all throughout a Python interpreter. > Most of the time when I see this, it is because people are > thinking of variables having values which is mostly a > carry-over from old Fortran/Cobol/Basic programming ideas. Most of the time when I see it, it's written by someone who's used Python for quite some time. It's a standard Python idiom. You'll find it all over the standard library. It's not a carry-over from Fortran/Cobol/Basic at all. > In python variables are pointers to objects. Objects could > be values, but they are not placeholders where you store > stuff. And all immutable objects are indistinguishable from values. Immutable objects include ints, longs, strings, unicode objects, tuples, frozensets, and perhaps some others that I'm forgetting. > I read on this list (quite frequently) that people > think they are getting 6 separate variables each with > a zero stored in them. That's because they are. They're getting 6 different pointers (bindings) to zero. If you change one, the others remain pointed at (bound to) zero. > They are not. They are getting > six pointers that all point to an integer zero Six *different* pointers. Six *different* bindings. > (IMHO it > would be a rather odd application for a programmer > to want this). No, it wouldn't be. It's exactly how a person works with immutable (value) objects. > Here is where multiple assignments > causes problems for beginners: > > >>> a=[] > >>> b=c=a > >>> a.append(6) > >>> b > [6] Yes, that does sometimes trouble beginners to programming. But so do regular expressions. Programmers ought not to restrict themselves by what beginners will have no difficulty learning. > What?? 'b' should contain an empty list, right? Nope. > a, b, and c all point to the SAME list just like the > poster's q, r, s, t, u, v all point to the SAME zero. There is only one zero in Python! It can never change! > What they meant to write was: > > c=a[:] # Shallow copy of list > b=a[:] > > My rule, don't do it unless you know exactly why you > want to do it. It will trip you up at some point and > be VERY hard to find. Your rule should only be followed by people who obstinately refuse either to understand the way variable bindings work in Python, or by people who refuse to know or care whether a given kind of object is immutable. And that group of people doesn't seem to include any of the good Python programmers I know. Jeremy -- http://mail.python.org/mailman/listinfo/python-list
Re: Can I use python for this .. ??
san wrote: > Hi > > I am using windows xp and have installed python and win32. I am > familiar with basic Python. I wanted to control some of the > applications via python script. > > I would like to write a python script to say: > 1. Open firefox and log on to gmail > 2. Another firefox window to visit slickdeals > 3. Open winamp and tune in to a shoutcast station > 4. Open groupwise ... > etc .. > > These are the task I do every day whenever I log on my computer .. it > just seems repetitive and hence probably can be coded in python. > > Can I do this in python? Where do I find the COM objects/interfaces for > all these different programs? Are there any sample codes ? > > Thanks. > Santosh. > What you want looks like a way to automate the windows gui using python. Since I never done this myself I gave google a try with this query: http://www.google.com/search?hl=en&q=windows+gui+automation+python&btnG=Google+Search It looks like pywinauto seems to be a good candidate. hth -- mph -- http://mail.python.org/mailman/listinfo/python-list
Re: Can I use python for this .. ??
san, Take a look at this thread which features some smart and helpful people and good links. http://tinyurl.com/ggn5e I'm wagering you'll make more sense of it than I did. I have my hands full just making my way through tutorials and books at the moment. rick -- http://mail.python.org/mailman/listinfo/python-list
Re: __init__.py, __path__ and packaging
In comp.lang.python, hai scritto: > Sandro Dentella wrote: >> The structure of my package: >> >> python/ >> `-- dbg/ >>|-- __init__.py >>`-- lib >>|-- __init__.py >>|-- debug.py >>`-- gtk_dbg.py >> >> my sys.path includes 'python' and I wanted that the content of debug.py was >> simply included by: 'import dbg', so I wrote dbg/__init__.py as follows: >> >> import os >> Dir = os.path.dirname(__file__) >> __path__ = [os.path.join(Dir, 'lib')] >> from debug import * > > What you probably want in python/dbg/__init__.py to get values is: > > from dbg.lib.debug import * This does not work: Traceback (most recent call last): File "", line 1, in ? File "dbg/__init__.py", line 8, in ? from dbg.lib.debug import * ImportError: No module named lib.debug > >> BUT, if I set some variables they are not correctly seen: >> import dbg >> dbg.DBG = 1 >> function test included in debug.py raises NameError: >> def test(): >> print DBG >> NameError: global name 'DBG' is not defined` >> >> What's happening? DBG seems to be set, as shown by dir(dbg)... any hints? > You misunderstand modules and python variables. Each module has a > dictionary associating the names of its globals and their current > values. After: > import dbg.lib.debug, dbg.lib.gtk_dbg > you have four modules: > dbg # Corresponds to python/dbg/__init__.py > dbg.lib # Corresponds to python/dbg/lib/__init__.py > dbg.lib.debug # Corresponds to python/dbg/lib/debug.py > dbg.lib.gtk_dbg # Corresponds to python/dbg/lib/gtk_dbg.py > Each has its own globals. > after: > dbg.DBG = 1 > the dbg module's global dictionary contains an entry mapping 'DBG' to 1 > after: > dbg.DBG = 1+2 > the dbg module's global dictionary contains an entry mapping 'DBG' to 3 > > In no case will an assignment to a global in dbg cause an assignment to > anything in dbg.lib.debug. The "from dbg.lib.debug import *" statement > can be seen as a module import followed by a fancy multiple assignment, > where module dbg.lib.debug is first imported, then its globals are > assigned to globals of the same names in module dbg. This confirms to me that I'm seriously confused... so I started with a very simple setup: $ cat dbg.py DBG = 1 def test(): global DBG print DBG def set(): global DBG DBG = 3 $ cat m.py from dbg import * test() #dbg.DBG = 2 ## does not work, no way to assign in module dbg set() # this acts in dbg module and sets 'DBG = 3' test() # test the value of DBG print DBG $ python m.py 1 3 # changed by 'set' that was 'imported' 1 # value of local DBG isn't this contraddicting you words: > can be seen as a module import followed by a fancy multiple assignment, > where module dbg.lib.debug is first imported, then its globals are > assigned to globals of the same names in module dbg. So: which is the way I can change a value of a package 'imported', only with a function that sets it? is there a way to assign the value directly? is there any way to make some introspection of what is really there (in dbg)? Thanks angain for any possible hint. sandro *:-) -- Sandro Dentella *:-) http://www.tksql.orgTkSQL Home page - My GPL work -- http://mail.python.org/mailman/listinfo/python-list
Re: Why does built-in set not take keyword arguments?
Jack Diederich wrote: > On Thu, May 04, 2006 at 02:08:30PM -0400, Steven Watanabe wrote: > > I'm trying to do something like this in Python 2.4.3: > > > > class NamedSet(set): > > def __init__(self, items=(), name=''): > > set.__init__(self, items) > > self.name = name > > > > class NamedList(list): > > def __init__(self, items=(), name=''): > > list.__init__(self, items) > > self.name = name > > > > I can do: > > > > >>> mylist = NamedList(name='foo') > > > > but I can't do: > > > > >>> myset = NamedSet(name='bar') > > TypeError: set() does not take keyword arguments > > > > How come? How would I achieve what I'm trying to do? > > setobject.c checks for keyword arguments in it's __new__ instead > of its __init__. I can't think of a good reason other to enforce > inheriters to be maximally set-like. We're all adults here so > I'd call it a bug. bufferobect, rangeobject, and sliceobject all > do this too, but classmethod and staticmethod both check in tp_init. > Go figure. > > As a work around use a function to make the set-alike. > > class NamedSet(set): pass > > def make_namedset(vals, name): > ob = NamedSet(vals) > ob.name = name > return ob > > Then make_namedset as a constructor in place of NamedSet(vals, name) Or use this work around: class NamedSet(set): def __new__(cls, iterable=(), name=""): return super(NamedSet, cls).__new__(cls) def __init__(self, iterable=(), name=""): super(NamedSet, self).__init__(iterable) self.name = name -- http://mail.python.org/mailman/listinfo/python-list
Re: Why does built-in set not take keyword arguments?
On Thu, May 04, 2006 at 02:08:30PM -0400, Steven Watanabe wrote: > I'm trying to do something like this in Python 2.4.3: > > class NamedSet(set): > def __init__(self, items=(), name=''): > set.__init__(self, items) > self.name = name > > class NamedList(list): > def __init__(self, items=(), name=''): > list.__init__(self, items) > self.name = name > > I can do: > > >>> mylist = NamedList(name='foo') > > but I can't do: > > >>> myset = NamedSet(name='bar') > TypeError: set() does not take keyword arguments > > How come? How would I achieve what I'm trying to do? setobject.c checks for keyword arguments in it's __new__ instead of its __init__. I can't think of a good reason other to enforce inheriters to be maximally set-like. We're all adults here so I'd call it a bug. bufferobect, rangeobject, and sliceobject all do this too, but classmethod and staticmethod both check in tp_init. Go figure. As a work around use a function to make the set-alike. class NamedSet(set): pass def make_namedset(vals, name): ob = NamedSet(vals) ob.name = name return ob Then make_namedset as a constructor in place of NamedSet(vals, name) -Jack -- http://mail.python.org/mailman/listinfo/python-list
Re: scope of variables
thank you -- http://mail.python.org/mailman/listinfo/python-list
Re: Can I use python for this .. ??
Petr I dont want hibernation .. its more like starting a list of programs when i want to have fun time on my pc... but thanx for ur reply .. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can I use python for this .. ??
Why using Python? What about? 1. Open Power Options in Control Panel. (Click Start, click Control Panel, and then double-click Power Options.) 2.Click the Hibernate tab, select the Enable hibernate support check box, and then click Apply. (If the Hibernate tab is unavailable, your computer does not support this feature.) then: 1: Click Start and Shut Down, 2: Point the standby button and maintain the shift key pushed, 3: A new hibernation button appears: click it while still holding the shift key: voila your PC will hibernate (it mens computer will save your current setting and will switch off). Petr Jakes -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4.2 to 2.4.3 transition issue
Heh, Frederic, It seems that its Lilypond's (www.lilypond.org) fault. It registered its bin directory in the PATH variable, which seems to contain a python.exe too. So the result of: >>>import sys; sys.executable 'D:\\Program Files\\LilyPond\\usr\\bin\\python.exe' As for the instances of python24.dll, there are two: one in system32 and one in inkscape's directory. I 'fixed' it, by defining python's directory ahead of lilypond's. Now the right executable is called. Is there any other way instead of positioning in the PATH variable? -- http://mail.python.org/mailman/listinfo/python-list
Re: Using time.sleep() in 2 threads causes lockup when hyper-threading is enabled
In <[EMAIL PROTECTED]>, Grant Edwards wrote: > On 2006-05-04, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: >> The sleep statement does not return! > > Never, or does it just take a long time? > >> And this should not happen. > > Dude, it's MS Windows. > > It does all _sorts_ of stuff that it shouldn't. > > Having sleep() take orders of magnitude longer than it should > is not an uncommon complaint for MS Windows users. There was a > fairly extensive thread in this group about that problem just a > few weeks ago. IIRC, disabling some other program or service > fixed it for one MS victem. IIRC it was something like an NTP daemon that caused the clock to "jump" a little and (Window's) sleep was confused. Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: using urllib with ftp?
John Salerno wrote: > I've tried this already and it seems to work, but I'm curious if it's > okay to use urllib when trying to access a url that begins with ftp:// > instead of http://. Does this matter? It's only a text file, so it's not > really an FTP server I'm accessing, I don't think. I wasn't sure if > using ftplib would be overkill in this case, or if you even could use it > at all if you just want to get the page itself (the txt file). from the urllib documentation: Currently, only the following protocols are supported: HTTP, (versions 0.9 and 1.0), Gopher (but not Gopher-+), FTP, and local files. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python sample code for PLSQL REF CURSORS
Exactly what I was looking for.
Thanks alot
"Gerhard Häring" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> A.M wrote:
>> Hi,
>>
>> I am having hard time to find a sample that shows me how to return an OUT
>> REF CURSOR from my oracle stored procedure to my python program. [...]
>
> import cx_Oracle
>
> con = cx_Oracle.connect("me/[EMAIL PROTECTED]")
> cur = con.cursor()
> outcur = con.cursor()
> cur.execute("""
> BEGIN
> MyPkg.MyProc(:cur);
> END;""", cur=outcur)
>
> for row in out_cur:
> print row
>
> HTH,
>
> -- Gerhard
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Re: Can I use python for this .. ??
For starters, you need the os and webbrowser modules
import os
import webbrowser
webbrowser.open("http://mail.google.com/mail";)
# need to know the shell keyword for starting the app
os.system('start ' + 'Winword')
# the equivalent of double-clicking on the doc or file
os.startfile("c:/MyFiles/MyTextFile.txt")
If you actually want to log onto password-protected sites it gets
gnarly fast (beyond me). You can read about by perusing the urllib2
module or search this list at groups.google.com/group/comp.lang.python
Hope this helps.
rick
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Unable to use py2app
Hello, I am unable to use py2app. I have an error when I try to import it: ImportError: No module named py2app I have installed pyobjc-1.3.7. I am on Mac OS 10.4.6. It does not work. It does not work with python 2.4 and it does not work with python 2.3. Is it working with someone else? -- http://mail.python.org/mailman/listinfo/python-list
Re: Can I use python for this .. ??
btw i got the firefox to open and access some webpage and winamp running .. code below -- import os import os.path import subprocess # Web pages ffox_exe = r'C:\Program Files\Mozilla Firefox\firefox.exe' assert os.path.exists(ffox_exe) # open gmail url = "http://www.gmail.com"; child = subprocess.Popen( (ffox_exe, url), executable = ffox_exe) rc = child.wait() # Winamp wamp_exe = r'C:\Program Files\Winamp\winamp.exe' assert os.path.exists(wamp_exe) url = "http://64.236.34.97:80/stream/1040"; child = subprocess.Popen( (wamp_exe, url), executable = wamp_exe) now is there anyway i can enter user name and password and then click okay .. (not for gmail but for other similar webpages which require loggin) .. ?? how to open pages in tabs .. ?? San -- http://mail.python.org/mailman/listinfo/python-list
using urllib with ftp?
I've tried this already and it seems to work, but I'm curious if it's okay to use urllib when trying to access a url that begins with ftp:// instead of http://. Does this matter? It's only a text file, so it's not really an FTP server I'm accessing, I don't think. I wasn't sure if using ftplib would be overkill in this case, or if you even could use it at all if you just want to get the page itself (the txt file). Thanks. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4.2 to 2.4.3 transition issue
Panos Laganakos wrote: > OS: Windows XP + SP1 > > On this particular box, I hadn't moved to 2.4.3 yet. > So, earlier today, I uninstalled Python2.4.2 and installed 2.4.3 using > the .msi installer. > > It seems though everything looked great, that when I invoke 'python' > from the command line, I get Python2.4.2 (as the header states), > instead of 2.4.3. > > I looked at the registry and at the PATH variables of both system and > current user, but they are just stating 'C:\Python24\'. > > When I explicitly call C:\Python24\python.exe though, 2.4.3 comes up. > > Any ideas what seems to be the problem here? in your python 2.4.2 interpreter, what does >>> import sys >>> sys.executable say ? if you do a global search for "python24.dll", how many instances do you find ? -- http://mail.python.org/mailman/listinfo/python-list
Re: Swaying A Coder Away From Python
I usually refer to it as "VILE!". As in what Vile thing do I have before me. Emacs all the way baby! -- http://mail.python.org/mailman/listinfo/python-list
Why does built-in set not take keyword arguments?
I'm trying to do something like this in Python 2.4.3: class NamedSet(set): def __init__(self, items=(), name=''): set.__init__(self, items) self.name = name class NamedList(list): def __init__(self, items=(), name=''): list.__init__(self, items) self.name = name I can do: >>> mylist = NamedList(name='foo') but I can't do: >>> myset = NamedSet(name='bar') TypeError: set() does not take keyword arguments How come? How would I achieve what I'm trying to do? Thanks. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Python 2.4.2 to 2.4.3 transition issue
OS: Windows XP + SP1 On this particular box, I hadn't moved to 2.4.3 yet. So, earlier today, I uninstalled Python2.4.2 and installed 2.4.3 using the .msi installer. It seems though everything looked great, that when I invoke 'python' from the command line, I get Python2.4.2 (as the header states), instead of 2.4.3. I looked at the registry and at the PATH variables of both system and current user, but they are just stating 'C:\Python24\'. When I explicitly call C:\Python24\python.exe though, 2.4.3 comes up. Any ideas what seems to be the problem here? -- http://mail.python.org/mailman/listinfo/python-list
Re: CRC calculation
Check out http://docs.python.org/lib/module-zlib.html comes with a CRC function. -- http://mail.python.org/mailman/listinfo/python-list
Re: Swaying A Coder Away From Python
Rony Steelandt wrote: > What s wrong with VI ??? :) it's spelled "vim". -- http://mail.python.org/mailman/listinfo/python-list
CRC calculation
Does anyone know where I can get python code to perform a CRC calculation on an IP packet? -- http://mail.python.org/mailman/listinfo/python-list
Can I use python for this .. ??
Hi I am using windows xp and have installed python and win32. I am familiar with basic Python. I wanted to control some of the applications via python script. I would like to write a python script to say: 1. Open firefox and log on to gmail 2. Another firefox window to visit slickdeals 3. Open winamp and tune in to a shoutcast station 4. Open groupwise ... etc .. These are the task I do every day whenever I log on my computer .. it just seems repetitive and hence probably can be coded in python. Can I do this in python? Where do I find the COM objects/interfaces for all these different programs? Are there any sample codes ? Thanks. Santosh. -- http://mail.python.org/mailman/listinfo/python-list
regex to exctract informations
Dears,
I am trying to search and replace strings with regex.
The string is identified by a keyword :
IDImage("1M234567");
DescriptionImage("Desc of the Image 1");
I want to exctract the IDImage (1M234567 ) and the Description.
The ID are characters and numbers, the description too.
Thx,
Bertrand
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Re: Tuple assignment and generators?
> I don't think he was explicitly wanting to initialize > things to zero, but rather unpack an arbitrary sequence > into a tuple (could perhaps be the fibonnacci sequence > for example). Ant is correct here...Fibonnaci, digits of pi, the constant 42, an incrementing counter, a series of squares, whatever. That was my original intent in the matter. Zeros just happened to be a nice sort of place to start my exercise. > How about: > > def zeros(count): > > ... for i in range(count): > ... yield 0 One of the things I was trying to avoid was having to know (and maintain) the count of items initialized. In the theoretical world of my example, one could do something like def counter(): counter = 0 while 1: yield counter counter += 1 and then initialize several variables, such as >>> a,b,c,d,e,f,g = counter() >>> a,b,c,d,e,f,g (0,1,2,3,4,5,6) It's similar to C's auto-numbering of enum values...If I want to add another entry to a C enum, I just put it there, and let the language take care of matters. With most of the provided solutions, I also have to increment the count each time I add an item to the list. Diez provided an elegant solution with a decorator (employing an incredibly ugly sort of hack involving sniffing the opcode stack behind the scenes) that does what I was looking for. I was hoping that there was just some __foo__ property I was missing that would have been called in the process of tuple unpacking that would allow for a more elegant solution such as a generator (or generator method on some object) rather than stooping to disassembling opcodes. :) Ah well. -tkc -- http://mail.python.org/mailman/listinfo/python-list
[HOST] - Flexible Project Hosting with Python (similar to Assembla Breakout)
For a larger scale project, a collaboration infrastructure and toolset should be selected. More information about the overall project: http://lazaridis.com/pj The actually active system is a Dedicated Server (with Trac & SVN). A Project Host Candidate which comes close to the needed system is Assembla ( http://assembla.com ), but currently it does not comply fully to the Basic Requirements. You can find the actual selection case here: http://case.lazaridis.com/host Are there any other Python-Centric Project Hosts available (which could comply to the stated requirements)? Any suggestions are very welcome. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tuple assignment and generators?
Just wrote: > In article <[EMAIL PROTECTED]>, > Larry Bates <[EMAIL PROTECTED]> wrote: > >> While I have never needed anything like this in my 5 years of Python >> programming, here is a way: >> >> a,b,c = 3*[0] >> q,r,s,t,u,v = 6*[0] > > This is (IMO) fairly idiomatic: > >a = b = c = 0 >q = r = s = t = u = v = 0 > > Just You must be careful with this as they all point to exactly the same object. Example: >>> q = r = s = t = u = v = 0 >>> id(q) 3301924 >>> id(r) 3301924 >>> id(s) 3301924 >>> Notice that all of them point to exactly the same object, not 6 copies of zero which is "probably" what the poster was thinking. Most of the time when I see this, it is because people are thinking of variables having values which is mostly a carry-over from old Fortran/Cobol/Basic programming ideas. In python variables are pointers to objects. Objects could be values, but they are not placeholders where you store stuff. I read on this list (quite frequently) that people think they are getting 6 separate variables each with a zero stored in them. They are not. They are getting six pointers that all point to an integer zero (IMHO it would be a rather odd application for a programmer to want this). Here is where multiple assignments causes problems for beginners: >>> a=[] >>> b=c=a >>> a.append(6) >>> b [6] What?? 'b' should contain an empty list, right? Nope. a, b, and c all point to the SAME list just like the poster's q, r, s, t, u, v all point to the SAME zero. What they meant to write was: c=a[:] # Shallow copy of list b=a[:] My rule, don't do it unless you know exactly why you want to do it. It will trip you up at some point and be VERY hard to find. -Larry Bates -- http://mail.python.org/mailman/listinfo/python-list
Re: Possible constant assignment operators ":=" and "::=" for Python
[EMAIL PROTECTED] a écrit :
> Yes, I know that "constant" A will also be modified as the b[0] points
> to A. Obviously the [] should be marked as immutable, as A is declared
> to be constant thus immutable. If somebody tries to modify this
> immutable object an error would occur.
>
> When I further thought about this problem with constant objects (and
> values), I run into this scenario: What if I want to use a constant
> object/value as a template (or predefined value/class) for a variable:
>
> constant A = ['1'] # let's declare A as immutable constant value/object
> b = A # let's assign b some default value
> b.append('2') # and let's play with b, but I wouldn't want to change A
def A():
return ['1']
b = A()
b.append('2')
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Re: Possible constant assignment operators ":=" and "::=" for Python
[EMAIL PROTECTED] a écrit : > Bruno Desthuilliers wrote: > >>[EMAIL PROTECTED] a écrit : >> >>>Hi Pythonians, >>> >>>To begin with I'd like to apologize that I am not very experienced >>>Python programmer so please forgive me if the following text does not >>>make any sense. >>> >>>I have been missing constants in Python language. >> >>Why so ? >> >>I guess you're talking about named (symbolic) constants ? If so, just >>follow the convention : a name in ALL_UPPERCASE is a constant (or at >>least will be treated as such by anyone not wanting to mess with your >>package's implementation). No need to add extra syntax here IMHO. > > > Hi Bruno, > > For example: > > A = [] # let's declare a "constant" here Uh ? That's the strangest idea I've ever seen - I mean, using an empty list as a constant... If you need your constant to be a sequence (while I can't imagine any reason to do so), use a tuple. (snip) > As you can see, the "constant" A can be modified this easily. But if > there were an intuitive mechanism to declare a symbol to be immutable, Don't worry about the symbol, use an immutable type !-) -- http://mail.python.org/mailman/listinfo/python-list
how Can I programater in python similar to Delphi
Hello, friends. I can programter in python similar to delphi, enveloper form for capture ther data from user. some help. sincerely TOMAS- Este correo fue escaneado en busca de virus con el MDaemon Antivirus 2.27 en el dominio de correo angerona.cult.cu y no se encontro ninguna coincidencia. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question on code vetting
[EMAIL PROTECTED] wrote: > I agree with your point, which is why I asked the question. Risk cannot be > eliminated, but it can be understood and managed so that useful work can > still be done. If there is any way I can find out what the commiters do > prior to reaching a decision to accept or reject a particular submission, > I would like to know about it. If committers make no checks on submitted code, that doesn't have to be an automatic showstopper, even for a risk-averse company. How many of the alternatives perform more stringent checks on their code? How much misappropriated code is floating around in closed commercial products, where the privacy of the source may encourage more liberal borrowing? Anyone can say they check their IP, but how many organizations put their money where their mouth is and provide indemnity? How visible will your company and your Python projects be? You can always try to make the case that even without ip checks python makes your company 1) no more vulnerable than the other software they already rely on, and 2) unlikely to be targetted for their use anyway. And if you can show the financial gains from using it are highger than the potential liability, you're golden. -- http://mail.python.org/mailman/listinfo/python-list
Re: __getattr__ for global namespace?
Harold Fellermann a écrit : > Hi, > > I am writing an application that initializes the global namespace, and > afterwards, leaves the user with the python prompt. Now, I want to > catch NameErrors in user input like e.g. > > some_name > > Traceback (most recent call last): > File "", line 1, in ? > NameError: name 'some_name' is not defined > > For classes, there are the __getattr__ and __getattribute__ functions. > I wonder if there is some related function for (failed) global > attribute > lookup that is invoked with name as its argument instead. > > I consulted the docs, but could not find anything. Any ideas? http://docs.python.org/lib/module-sys.html """ excepthook( type, value, traceback) This function prints out a given traceback and exception to sys.stderr. When an exception is raised and uncaught, the interpreter calls sys.excepthook with three arguments, the exception class, exception instance, and a traceback object. In an interactive session this happens just before control is returned to the prompt; in a Python program this happens just before the program exits. The handling of such top-level exceptions can be customized by assigning another three-argument function to sys.excepthook. """ >>> import sys >>> def myhook(type, value, tb): ... print "got ", type, value, tb ... ... >>> sys.excepthook = myhook >>> toto got exceptions.NameError name 'toto' is not defined >>> HTH -- http://mail.python.org/mailman/listinfo/python-list
Re: Subclassing array
Sion Arrowsmith a écrit : > Alex Martelli <[EMAIL PROTECTED]> wrote: > >>TG <[EMAIL PROTECTED]> wrote: >> >>>When I call Vector.__init__() in Stimulus, doesn't it also call __new__ >>>? I don't understand the detail of callings to __new__ and __init__ in >>>python inheritance ... >> >>Calling a (new-style) class does __new__ first, THEN calls the class's >>__init__ on the resulting instance -- and the arguments you're passing >>when calling the class go to both __new__ and __init__. > > > ... so you might want something like: > > class Vector(array): > def __new__(cls,*args): > return super(Vector,cls).__new__(cls,'f') > And if you want to support named arguments: class Vector(array): def __new__(cls,*args, **kw): return super(Vector,cls).__new__(cls,'f') -- http://mail.python.org/mailman/listinfo/python-list
Re: noob question: "TypeError" wrong number of args
bruno at modulix wrote: > Edward Elliott wrote: >> Ah, well then, there's no need for a full-blown parser. It should >> suffice to recognize a class definition and modify the parameter list of >> every def indented one level further than that. > > won't do : > > class CounterExample(object): > if compute_some_const_according_to_phase_of_moon(): > def meth(...): > do_something(self, 42) Uuunn, you got me pardner. (cough, cough) my hands, they're so cold. bruno? where'd you go, bruno? i can't see you anymore. are we back on the farm? tell ma i love her. (clunk) -- http://mail.python.org/mailman/listinfo/python-list
Re: Possible constant assignment operators ":=" and "::=" for Python
Michele Simionato wrote:
>> >>> A = [] # let's declare a "constant" here
>> >>> b = A # and let's assign the constant here
>> >>> b.append('1') # OOPS!
>
> But it makes no sense to use a mutable object for a constant!
> The user should use a tuple,
Sure. Now show me the builtin immutable equivalent of a dict.
> or a custom list-like type where
> all methods with side effects are removed, so it effectively acts
> as a tuple.
Ugh, not worth the trouble imo.
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Re: Python for Perl programmers
I found this version of the phrasebook: http://wiki.python.org/moin/PerlPhrasebook its been edited recently but I didn't check for how current it is. -- Pad. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python for Perl programmers
On May 4, 2006, at 12:36 PM, Aahz wrote: > In article <[EMAIL PROTECTED]>, > A.M <[EMAIL PROTECTED]> wrote: >> >> Is there any efficient online resource or book that help >> experienced Perl >> programmers to Python? I'd recommend http://www.diveintopython.org since you know how to program already. It's free! --- Andrew Gwozdziewycz [EMAIL PROTECTED] http://ihadagreatview.org http://and.rovir.us -- http://mail.python.org/mailman/listinfo/python-list
Re: Python for Perl programmers
"A.M" <[EMAIL PROTECTED]> writes: > Is there any efficient online resource or book that help experienced Perl > programmers to Python? Worry instead about how you're going to keep maintaining your Perl code after you've developed an allergic response to it. <0.5 wink> John -- http://mail.python.org/mailman/listinfo/python-list
Re: Python & SSL
Sybren Stuvel <[EMAIL PROTECTED]> writes: > John J. Lee enlightened us with: > > Of course, remembering that the first thing to ask in response to > > "is it secure?" is "against what?", for lots of purposes it just > > doesn't matter that it ignores certificates. > > I'm curious. Can you give me an example? AFAIK you need to know who > you're talking to before transmitting sensitive information, otherwise > you could be talking to anybody - and that's just what you wanted to > prevent with the encryption, right? If Edward hadn't answered I would have said something along the lines of what he said too, but more than that I just had in mind situations where, when fetching a web page, the risk (probability and consequences) of a man-in-the-middle attack doesn't feature much higher than the risk of getting hit by a piece of debris from outer space that day. Surprisingly often, it so happens that the people setting up the web site used https, even though as a user of the site I don't really care about the encryption or authentication. That doesn't mean proper certificate handling wouldn't be good to have (it would), just that installing m2crypto and finding the right docs isn't necessarily worth the bother. BTW, I assume the reason the OP (I forgot who that was) didn't have https support compiled in was just that they didn't have OpenSSL installed when they typed ./configure (since the Python build process on unix uses autoconf). Either that or they installed a system package to get Python (e.g. an .rpm) and the SSL support is is a separate package (seems unlikely). John -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem building extension under Cygwin (ImportError: Bad address)
Great! Thanks for the advice. Lars -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple Version Install?
[David C.Ullrich] > Would there be issues (registry settings, environment > variables, whatever) if a person tried to install > versions 1.x and 2.x simultaneously on one Windows > system? Windows 98, if it matters. > > (I can handle the file associations with no problem.) There are generally no issues beyond file associations. On Windows, Python versions i.j.k and i'.j'.k' coexist happily so long as i != i' or j != j'. For example, I currently have the python.org-released Pythons 2.2.3, 2.3.5, and 2.4.3 installed on my Windows box. It would be a challenge only if I wanted, say, 2.4.2 and 2.4.3 installed simultaneously. Another possible issue is that whenever the major or minor version numbers (i or j) change on Windows, you also need to install matching versions of any 3rd party extensions you want. The major and minor version numbers appear in the _name_ of the core Python DLL (like python23.dll and python24.dll), and extensions with C code must be compiled to link with the correct version of the Python DLL. > If anyone feels like pointing out that there's simply > no reason to want to keep 1.x after installing the > current version: By all means talk me into that! If you've been using extensions with 1.j.k, then as above they have no chance of working with 2.j'.k' bejore you install 2.j' versions of those extensions. That's a good reason to keep an old version. There have been thousands of bugfixes and language enhancements since 1.j.k too, and not all are 100% backward-compatible. In all, best advice is to keep the old version around until you're sure you no longer need it. > The problem is not that I'm concerned about backwards > compatibility of Python code. The problem is that I > use Python embedded in various Delphi programs, > including a "DIDE" that I use really a lot, via > a certain set of Delphi "components". These components > don't seem to work with 2.x. Presumably the PyDelphi > people have new versions of the components that do > work with Python 2.x. These presumably use much > newer versions of Delphi than what I have. A new > version of Delphi is not free... If I could use > Python 2.x when I need to while continuing to > use 1.x the way I have been for things that > don't need 2.x that would be convenient. That should work fine. I don't know about PyDelphi, but found what appears to be a still-active discussion list: http://groups.yahoo.com/group/pythonfordelphi/ The theoretical joy of open source is that if they _don't_ support the Python+Delphi combo you have, you can fix that yourself ;-) -- http://mail.python.org/mailman/listinfo/python-list
pyuno and PDF output
I can use java to output a PDF file using uno, but when I try to do it in
python, I get an IO Exception with no added information. The relevant code
snippet follows:
from com.sun.star.beans import PropertyValue
PDF= PropertyValue( "FilterName" , 0 , "writer_pdf_Export", 0 )
doc2.storeAsURL("file:///C:/alleclipse/OpenOffice/test2.pdf", (PDF,) )
if I don't specify any properties, it writes an "odt" file just fine, but
when I specify (PDF,) it breaks.
Traceback (most recent call last):
File "oomerge.py", line 137, in ?
test1()
File "oomerge.py", line 74, in test1
doc2.storeAsURL("file:///C:/alleclipse/OpenOffice/test2.pdf", (PDF,) )
__main__.com.sun.star.task.ErrorCodeIOException
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Re: Tuple assignment and generators?
In article <[EMAIL PROTECTED]>, Larry Bates <[EMAIL PROTECTED]> wrote: > While I have never needed anything like this in my 5 years of Python > programming, here is a way: > > a,b,c = 3*[0] > q,r,s,t,u,v = 6*[0] This is (IMO) fairly idiomatic: a = b = c = 0 q = r = s = t = u = v = 0 Just -- http://mail.python.org/mailman/listinfo/python-list
Re: Python & SSL
Edward Elliott enlightened us with: > Encryption has multiple meanings. In the general sense, it > encompasses all of cryptography and the information security > properties crypto provides. And if you already know who'll get the message, it's secure. I get it :) Thanks for the nice read ;-) > Of course if you control the server and serve a small clientele who > already trust you, you can have clients import your own cert so they > really can be sure who they're talking to -- as long as your master > key remains secret. I'm used to using it like that. My own graduation project uses SSL to thoroughly check the identity of both parties, without a web of trust. > The moral of this story is: computer security is an ugly, complex > business. Yup. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
cross platform libraries
I am using python on a linux terminal. I want to shutdown a remote windows box. I found a script which does something like this. My question is can we use windows libraries in linux as follows import win32api import win32con import win32netcon import win32security import win32wnet def shutdown(parameters): OTHER CODE HERE Every help is appreciated. -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with reload(sys) (doing reload on the sys module)
Looks like a bug (probably in IDLE): when I start IDLE from the command line, it pops up its interaction window and here is what it says about stdout: IDLE 1.1.2 >>> import sys >>> sys.stdout Then I try the reload and I get no output in the interaction window: >>> reload(sys) >>> sys.stdout >>> After the reload, stdout has been changed to the terminal from which IDLE got started, so I see the messages there: ', mode 'w' at 0xb7b67068> As you can see, stdout has been redefined (back to the way it would be if you started Python from the command line, with no IDLE involved). -- nick (nicholas dot dokos at hp dot com) -- http://mail.python.org/mailman/listinfo/python-list
Re: Python for Perl programmers
In article <[EMAIL PROTECTED]>, A.M <[EMAIL PROTECTED]> wrote: > >Is there any efficient online resource or book that help experienced Perl >programmers to Python? Don't use the Martin Brown book, whatever you do. The Perl/Python Phrasebook isn't bad, but it's ten years out of date. Really, your best bet is to just dive into the Python tutorial. -- Aahz ([EMAIL PROTECTED]) <*> http://www.pythoncraft.com/ "Argue for your limitations, and sure enough they're yours." --Richard Bach -- http://mail.python.org/mailman/listinfo/python-list
Re: Tuple assignment and generators?
I don't think he was explicitly wanting to initialize things to zero, but rather unpack an arbitrary sequence into a tuple (could perhaps be the fibonnacci sequence for example). How about: >>> def zeros(count): ... for i in range(count): ... yield 0 ... >>> a,b,c = zeros(3) >>> a 0 >>> b 0 >>> c 0 -- http://mail.python.org/mailman/listinfo/python-list
Re: Mutable String
Ok, That will do the job. Thank you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tuple assignment and generators?
Tim Chase wrote: > Just as a pedantic exercise to try and understand Python a bit better, I > decided to try to make a generator or class that would allow me to > unpack an arbitrary number of calculatible values. In this case, just > zeros (though I just to prove whatever ends up working, having a > counting generator would be nice). The target syntax would be something > like > a,b,c = zeros() q,r,s,t,u,v = zeros() > > where "zeros()" returns an appropriately sized tuple/list of zeros. > > I've tried a bit of googling, but all my attempts have just ended up > pointing to pages that blithly describe tuple assignment, not the > details of what methods are called on an object in the process. > > My first thought was to get it to use a generator: > > def zeros(): > while 1: yield 0 > > However, I get back a "ValueError: too many values to unpack" result. > > As a second attempt, I tried a couple of attempts at classes (I started > with the following example class, only derived from "object" rather than > "list", but it didn't have any better luck): > class zeros(list): > ... def __getitem__(self,i): > ... return 0 > ... z = zeros() a,b,c = z > Traceback (most recent call last): > File "", line 1, in ? > ValueError: need more than 0 values to unpack > > > It looks like I need to have a pre-defined length, but I'm having > trouble figuring out what sorts of things need to be overridden. It > seems like I sorta need a > > def __len__(self): > return INFINITY > > so it doesn't choke on it. However, how to dupe the interpreter into > really believing that the object has the desired elements is escaping > me. Alternatively if there was a "doYouHaveThisManyElements" > pseudo-function that was called, I could lie and always return true. > > Any hints on what I'm missing? > > Thanks, > > -tkc > > While I have never needed anything like this in my 5 years of Python programming, here is a way: a,b,c = 3*[0] q,r,s,t,u,v = 6*[0] of if you like: def zeros(num): return num*[0] a,b,c = zeros(3) q,r,s,t,u,v = zeros(6) I think the reason I don't every use anything like this is that you don't need to initialize variables in Python to zero and I would probably use a list instead of individual variables like q,r,s,t,u,v. -Larry Bates -- http://mail.python.org/mailman/listinfo/python-list
Re: Progamming python without a keyboard
That reminds me a session in an R&D lab a long time ago One of the guys kept talking to himself, commenting code, bugs . he drove me nuts Eventually (weeks later) another guy silently stood up, went to the first guy, and without a word attempted to strangle him. He got stopped ... but did not get fired (I guess even the management was tired of the first guy rambling) We should be aware of all types of RSI. (I'm still laughing) Philippe Rony Steelandt wrote: > http://www.newscientisttech.com/article/dn9066 > > To nice to be true ? > > R_ > > -- > --- > Rony Steelandt > BuCodi > rony dot steelandt (at) bucodi dot com > > Visit the python blog at http://360.yahoo.com/bucodi -- http://mail.python.org/mailman/listinfo/python-list
Python for Perl programmers
Hi, Is there any efficient online resource or book that help experienced Perl programmers to Python? Thank you, Alan -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling superclass
Florian Lindner wrote: > Hello, > I try to call the superclass of the ConfigParser object: > > class CustomizedConfParser(ConfigParser.SafeConfigParser): > def get(self, section, attribute): > try: > return super(CustomizedConfParser, self).get(section, > attribute) > # [...] > > > but that gives only > > return super(CustomizedConfParser, self).get(section, attribute) > TypeError: super() argument 1 must be type, not classobj > > I don't really understand the error message. super works only for newstyle-classes. So additionally extend CustomizedConfParser from object. diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Swaying A Coder Away From Python
Rony Steelandt wrote: > > "One problem is that python tools suck," he wrote. Wallace compared the > various IDEs and other developer tools available to Microsoft's freely > available Visual Studio Express and called them "toys." > > > > What s wrong with VI ??? :) User error, evidently. Sometimes the interface is more intelligent than its user, and every time this happens the interface is the one that gets the bad rap. Sorry for the snarky comment, but python dev tools do not suck, they are just generally different from visual studio. There are any number of good editing platforms for python, visual studio is just not really one of them. > > R_ > > >> On 4 May 2006 05:24:40 -0700, BartlebyScrivener <[EMAIL PROTECTED]> wrote: > >>> I'm picking this up via clp on Google Groups. I can't tell what Mr. > >>> Lundh is referring to. The first line of his post is: "Tim Williams > >>> wrote" but there's nothing that comes before. > > > > Similarly, I'm reading this via comp.lang.python and the original > > article hasn't shown up at this site. > > > > Tim Williams <[EMAIL PROTECTED]> wrote: > >> I found the web version at. > >> > > > >> http://www.devwebpro.co.uk/devwebprouk-46-20060503SwayingACoderAwayFromPython.html > > > > Wherein we find: > > > > He also listed a few reasons why C# appeals to him over Python or Java: > > * anonymous functions (delegates) > > * a python-like yield statement > > * a nice type system with generics > > * interfaces > > * properties (Yay!!) > > > > So that's two of the five Python has, one explicitly acknowledged, > > plus the combination of lambda and functions-as-first-class-objects > > is as good as (or better than) "anonymous functions (delegates)". > > And then we get onto personal preferences as to how to do type > > systems. That's not a great deal with which to sway someone. > > > -- > --- > Rony Steelandt > BuCodi > rony dot steelandt (at) bucodi dot com > > Visit the python blog at http://360.yahoo.com/bucodi -- http://mail.python.org/mailman/listinfo/python-list
Re: Tuple assignment and generators?
Tim Chase wrote: > Just as a pedantic exercise to try and understand Python a > bit better, I decided to try to make a generator or class > that would allow me to unpack an arbitrary number of > calculatible values. In this case, just zeros (though I > just to prove whatever ends up working, having a counting > generator would be nice). The target syntax would be > something like By using this: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/284742 I came up with a small decorator doing that: import inspect, dis def expecting(): """Return how many values the caller is expecting""" f = inspect.currentframe() f = f.f_back.f_back c = f.f_code i = f.f_lasti bytecode = c.co_code instruction = ord(bytecode[i+3]) if instruction == dis.opmap['UNPACK_SEQUENCE']: howmany = ord(bytecode[i+4]) return howmany elif instruction == dis.opmap['POP_TOP']: return 0 return 1 def variably_unpack(f): def d(*args, **kwargs): r = f(*args, **kwargs) exp = expecting() if exp < 2: return exp return (r.next() for i in xrange(exp)) return d @variably_unpack def test(): def gen(): i = 0 while True: yield i i += 1 return gen() a, b, c = test() print a,b,c a, b, c, d = test() print a,b,c, d Diez -- http://mail.python.org/mailman/listinfo/python-list
Calling superclass
Hello, I try to call the superclass of the ConfigParser object: class CustomizedConfParser(ConfigParser.SafeConfigParser): def get(self, section, attribute): try: return super(CustomizedConfParser, self).get(section, attribute) # [...] but that gives only return super(CustomizedConfParser, self).get(section, attribute) TypeError: super() argument 1 must be type, not classobj I don't really understand the error message. Thanks, Florian -- http://mail.python.org/mailman/listinfo/python-list
Progamming python without a keyboard
http://www.newscientisttech.com/article/dn9066 To nice to be true ? R_ -- --- Rony Steelandt BuCodi rony dot steelandt (at) bucodi dot com Visit the python blog at http://360.yahoo.com/bucodi -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem building extension under Cygwin (ImportError: Bad address)
On Thu, May 04, 2006 at 06:23:23AM -0700, Lars wrote: > But first compiling hello.c with gcc, then linking it with gnu-ld just > won't work. I only really need to compile one C-file to a shared > library so it doesn't matter so much for me. But bigger projects will > have a problem.. No, it works if you drive it from gcc: $ gcc -I/usr/include/python2.4 -c hello.c $ gcc -shared -o hello.dll hello.o -L/usr/lib/python2.4/config -lpython2.4 $ python hellouse.py Hello, C Hello, module /tmp/examples/PP2E/Integrate/Extend/Hello/hello.dll Hello, 0 Hello, 1 Hello, 2 BTW, if you use Distutils, then it will just work... Jason -- PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers Fingerprint: 7A73 1405 7F2B E669 C19D 8784 1AFD E4CC ECF4 8EF6 -- http://mail.python.org/mailman/listinfo/python-list
Re: Swaying A Coder Away From Python
"One problem is that python tools suck," he wrote. Wallace compared the various IDEs and other developer tools available to Microsoft's freely available Visual Studio Express and called them "toys." What s wrong with VI ??? :) R_ >> On 4 May 2006 05:24:40 -0700, BartlebyScrivener <[EMAIL PROTECTED]> wrote: >>> I'm picking this up via clp on Google Groups. I can't tell what Mr. >>> Lundh is referring to. The first line of his post is: "Tim Williams >>> wrote" but there's nothing that comes before. > > Similarly, I'm reading this via comp.lang.python and the original > article hasn't shown up at this site. > > Tim Williams <[EMAIL PROTECTED]> wrote: >> I found the web version at. >> >> http://www.devwebpro.co.uk/devwebprouk-46-20060503SwayingACoderAwayFromPython.html > > Wherein we find: > > He also listed a few reasons why C# appeals to him over Python or Java: > * anonymous functions (delegates) > * a python-like yield statement > * a nice type system with generics > * interfaces > * properties (Yay!!) > > So that's two of the five Python has, one explicitly acknowledged, > plus the combination of lambda and functions-as-first-class-objects > is as good as (or better than) "anonymous functions (delegates)". > And then we get onto personal preferences as to how to do type > systems. That's not a great deal with which to sway someone. -- --- Rony Steelandt BuCodi rony dot steelandt (at) bucodi dot com Visit the python blog at http://360.yahoo.com/bucodi -- http://mail.python.org/mailman/listinfo/python-list
Re: Subclassing array
Alex Martelli <[EMAIL PROTECTED]> wrote: >TG <[EMAIL PROTECTED]> wrote: >> When I call Vector.__init__() in Stimulus, doesn't it also call __new__ >> ? I don't understand the detail of callings to __new__ and __init__ in >> python inheritance ... >Calling a (new-style) class does __new__ first, THEN calls the class's >__init__ on the resulting instance -- and the arguments you're passing >when calling the class go to both __new__ and __init__. ... so you might want something like: class Vector(array): def __new__(cls,*args): return super(Vector,cls).__new__(cls,'f') -- \S -- [EMAIL PROTECTED] -- http://www.chaos.org.uk/~sion/ ___ | "Frankly I have no feelings towards penguins one way or the other" \X/ |-- Arthur C. Clarke her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump -- http://mail.python.org/mailman/listinfo/python-list
pyuno and oootools with OpenOffice 2.0
I'm using windows xp and OpenOffice 2.0 and doing my first project with pyuno. I've got the basics to work,. An example I googled at http://blogs.nuxeo.com/sections/aggregators/openoffice_org/blogaggregator_vi ew?b_start:int=0 imported an ootools module. When I try to import it, it does not exist, Does anyone know where this exists, or why I cannot import it. --- The information contained in this message may be privileged and / or confidential and protected from disclosure. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by replying to this message and deleting the material from any computer. --- -- http://mail.python.org/mailman/listinfo/python-list
Re: Swaying A Coder Away From Python
>On 4 May 2006 05:24:40 -0700, BartlebyScrivener <[EMAIL PROTECTED]> wrote: >> I'm picking this up via clp on Google Groups. I can't tell what Mr. >> Lundh is referring to. The first line of his post is: "Tim Williams >> wrote" but there's nothing that comes before. Similarly, I'm reading this via comp.lang.python and the original article hasn't shown up at this site. Tim Williams <[EMAIL PROTECTED]> wrote: >I found the web version at. > >http://www.devwebpro.co.uk/devwebprouk-46-20060503SwayingACoderAwayFromPython.html Wherein we find: He also listed a few reasons why C# appeals to him over Python or Java: * anonymous functions (delegates) * a python-like yield statement * a nice type system with generics * interfaces * properties (Yay!!) So that's two of the five Python has, one explicitly acknowledged, plus the combination of lambda and functions-as-first-class-objects is as good as (or better than) "anonymous functions (delegates)". And then we get onto personal preferences as to how to do type systems. That's not a great deal with which to sway someone. -- \S -- [EMAIL PROTECTED] -- http://www.chaos.org.uk/~sion/ ___ | "Frankly I have no feelings towards penguins one way or the other" \X/ |-- Arthur C. Clarke her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump -- http://mail.python.org/mailman/listinfo/python-list
Re: Wake on LAN and Shutdown for Windows and Linux
Any help is appreciated -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple Version Install?
On Thu, 4 May 2006 16:17:57 +0200, "Fredrik Lundh" <[EMAIL PROTECTED]> wrote: >David C.Ullrich wrote: > >> Would there be issues (registry settings, environment >> variables, whatever) if a person tried to install >> versions 1.x and 2.x simultaneously on one Windows >> system? Windows 98, if it matters. >> >> (I can handle the file associations with no problem.) > >in general, no. Excellent. Thanks. >(I usually have about a dozen Python's, or more, on most of my >windows boxes) > >however, applications that look in the registry may only find the >last one you've installed. > > > > David C. Ullrich -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode code has no method float() ?
Works, thank you > Le 04-05-2006, Rony <[EMAIL PROTECTED]> nous disait: >> How can I get the value of a Unicode object ? >> >> When I do myobject.float() I get the error message that it doesn't have >> a float() attribute > > Try to use the float builtin function, as in: float(myobject) instead of > a method. -- --- Rony Steelandt BuCodi rony dot steelandt (at) bucodi dot com Visit the python blog at http://360.yahoo.com/bucodi -- http://mail.python.org/mailman/listinfo/python-list
Re: Python function returns:
Michael Yanowitz <[EMAIL PROTECTED]> wrote: > In Python, there does not seem to be an easy way to have functions return >multiple values except it can return a list such as: >strHostname, nPortNumber, status = get_network_info (strIpAddress, >strHostname, > nPortNumber) > Am I missing something obvious? Is there a better, or more standard way >to return values from functions? I'm kind of repeating what other people have said, but there isn't a better way. Not just in Python, but in any language. If your function is returning multiple values, why should you have to split them into one privileged "return value" plus a bunch of Out (or InOut) parameters? That's a historical mis- feature of older languages, and one which more newer languages would do well to fix. -- \S -- [EMAIL PROTECTED] -- http://www.chaos.org.uk/~sion/ ___ | "Frankly I have no feelings towards penguins one way or the other" \X/ |-- Arthur C. Clarke her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump -- http://mail.python.org/mailman/listinfo/python-list
Re: stripping unwanted chars from string
Edward Elliott <[EMAIL PROTECTED]> wrote:
> I'm looking for the "best" way to strip a large set of chars from a filename
> string (my definition of best usually means succinct and readable). I
> only want to allow alphanumeric chars, dashes, and periods. This is what I
> would write in Perl (bless me father, for I have sinned...):
>
> $filename =~ tr/\w.-//cd, or equivalently
> $filename =~ s/[^\w.-]//
>
> I could just use re.sub like the second example, but that's a bit overkill.
> I'm trying to figure out if there's a good way to do the same thing with
> string methods. string.translate seems to do what I want, the problem is
> specifying the set of chars to remove. Obviously hardcoding them all is a
> non-starter.
(untested code, but, the general idea shd be correct)...:
class KeepOnly(object):
allchars = ''.join(chr(i) for i in xrange(256))
identity = string.maketrans('', '')
def __init__(self, chars_to_keep):
self.chars_to_delete = self.allchars.translate(
self.identity, chars_to_keep)
def __call__(self, some_string):
return some_string.translate(self.identity,
self.chars_to_delete)
Alex
--
http://mail.python.org/mailman/listinfo/python-list
Tuple assignment and generators?
Just as a pedantic exercise to try and understand Python a bit better, I decided to try to make a generator or class that would allow me to unpack an arbitrary number of calculatible values. In this case, just zeros (though I just to prove whatever ends up working, having a counting generator would be nice). The target syntax would be something like >>> a,b,c = zeros() >>> q,r,s,t,u,v = zeros() where "zeros()" returns an appropriately sized tuple/list of zeros. I've tried a bit of googling, but all my attempts have just ended up pointing to pages that blithly describe tuple assignment, not the details of what methods are called on an object in the process. My first thought was to get it to use a generator: def zeros(): while 1: yield 0 However, I get back a "ValueError: too many values to unpack" result. As a second attempt, I tried a couple of attempts at classes (I started with the following example class, only derived from "object" rather than "list", but it didn't have any better luck): >>> class zeros(list): ... def __getitem__(self,i): ... return 0 ... >>> z = zeros() >>> a,b,c = z Traceback (most recent call last): File "", line 1, in ? ValueError: need more than 0 values to unpack It looks like I need to have a pre-defined length, but I'm having trouble figuring out what sorts of things need to be overridden. It seems like I sorta need a def __len__(self): return INFINITY so it doesn't choke on it. However, how to dupe the interpreter into really believing that the object has the desired elements is escaping me. Alternatively if there was a "doYouHaveThisManyElements" pseudo-function that was called, I could lie and always return true. Any hints on what I'm missing? Thanks, -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: Subclassing array
TG <[EMAIL PROTECTED]> wrote: ... > When I call Vector.__init__() in Stimulus, doesn't it also call __new__ > ? I don't understand the detail of callings to __new__ and __init__ in > python inheritance ... Calling a (new-style) class does __new__ first, THEN calls the class's __init__ on the resulting instance -- and the arguments you're passing when calling the class go to both __new__ and __init__. Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode code has no method float() ?
Le 04-05-2006, Rony <[EMAIL PROTECTED]> nous disait: > How can I get the value of a Unicode object ? > > When I do myobject.float() I get the error message that it doesn't have > a float() attribute Try to use the float builtin function, as in: float(myobject) instead of a method. -- Alexandre Fayolle LOGILAB, Paris (France) Formations Python, Zope, Plone, Debian: http://www.logilab.fr/formations Développement logiciel sur mesure: http://www.logilab.fr/services Python et calcul scientifique: http://www.logilab.fr/science -- http://mail.python.org/mailman/listinfo/python-list
Unicode code has no method float() ?
How can I get the value of a Unicode object ? When I do myobject.float() I get the error message that it doesn't have a float() attribute tia R_ -- --- Rony Steelandt BuCodi rony dot steelandt (at) bucodi dot com Visit the python blog at http://360.yahoo.com/bucodi -- http://mail.python.org/mailman/listinfo/python-list
Re: python strings
Bryan <[EMAIL PROTECTED]> wrote: > >>> s = '\x00' > >>> s[0] == chr(0) >True That's a little excessive when: >>> s = '\0' >>> s[0] == chr(0) True Oh, and to reassure the OP that that null really is *in* the string: >>> len(s) 1 -- \S -- [EMAIL PROTECTED] -- http://www.chaos.org.uk/~sion/ ___ | "Frankly I have no feelings towards penguins one way or the other" \X/ |-- Arthur C. Clarke her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump -- http://mail.python.org/mailman/listinfo/python-list
Re: Calling a Postgres Function using CGI written in Python
cheers :) thats what i wanted to know :) David -- http://mail.python.org/mailman/listinfo/python-list
Re: simultaneous assignment
Dave Hansen <[EMAIL PROTECTED]> writes: > Well, if you want something minimalist, you could try > >def truth_test(seq): > return sum(1 for item in seq if item) == 1 def truth_test(seq): return sum(map(bool, seq)) == 1 -- http://mail.python.org/mailman/listinfo/python-list
Re: simultaneous assignment
On Tue, 02 May 2006 18:52:48 GMT in comp.lang.python, John Salerno <[EMAIL PROTECTED]> wrote: [...] > >Yeah, after trying some crazy things, I just wrote it this way: > >def truth_test(seq): > truth = 0 > for item in seq: > if item: > truth += 1 > if truth == 1: > return True > else: > return False You could replace those last four lines with return truth == 1 > >Not sure I like having to keep a counter though, but the other stuff I Well, if you want something minimalist, you could try def truth_test(seq): return sum(1 for item in seq if item) == 1 Though I'm not sure it's really any clearer... >did was really convoluted, like checking to see if the first item was >True, and if it was, popping it from the list and iterating over the >rest of the items (needless to say, the in-place change wasn't helpful). Perhaps something like def truth_test(seq): found = False for item in seq: if item: if found: return False found = True return found Gets you an early exit, anyway... All code untested. Regards, -=Dave -- Change is inevitable, progress is not. -- http://mail.python.org/mailman/listinfo/python-list
Re: Because of multithreading semantics, this is not reliable.
[EMAIL PROTECTED] a écrit : > Christophe > > >>Same reason that there is a warning in the "os.access" manual > > > I understand the if file exists open it code. > > I looked at the os.access documentation and see no "warning" or "not > reliable" wording there. > 6.1.4 Files and Directories > access(path, mode) > > > Olaf > 6.1.4 Files and Directories access( path, mode) Use the real uid/gid to test for access to path. Note that most operations will use the effective uid/gid, therefore this routine can be used in a suid/sgid environment to test if the invoking user has the specified access to path. mode should be F_OK to test the existence of path, or it can be the inclusive OR of one or more of R_OK, W_OK, and X_OK to test permissions. Return True if access is allowed, False if not. See the Unix man page access(2) for more information. Availability: Macintosh, Unix, Windows. Note: Using access() to check if a user is authorized to e.g. open a file before actually doing so using open() creates a security hole, because the user might exploit the short time interval between checking and opening the file to manipulate it. I call that note a warning. -- http://mail.python.org/mailman/listinfo/python-list
Re: Sorting a list of dictionaries by dictionary key
Tim Chase <[EMAIL PROTECTED]> wrote:
> > assuming that DateTime returns something that compares correctly, you can
> > do something like:
> >
> > def sortkey(item):
> > return item.get("from_datetime")
> >
> > data.sort(key=sortkey)
> >
> > (assuming Python 2.4 or later)
>
> Building on Fredrik's solution, for 2.3 (or earlier?), you
> can use
>
> data.sort(lambda a,b: cmp(a['from_datetime'],
> b['from_datetime']))
...and get a potentially very slow sort, if the list is long. Much
faster:
_aux = [ (d['from_datetime'], i, d) for (i, d) in enumerate(data) ]
_aux.sort()
data[:] = [ t[-1] for t in _aux ]
Google Search for DSU or [Decorate Sort Undecorate] ...
Alex
--
http://mail.python.org/mailman/listinfo/python-list
Re: Multiple Version Install?
David C.Ullrich wrote: > Would there be issues (registry settings, environment > variables, whatever) if a person tried to install > versions 1.x and 2.x simultaneously on one Windows > system? Windows 98, if it matters. > > (I can handle the file associations with no problem.) in general, no. (I usually have about a dozen Python's, or more, on most of my windows boxes) however, applications that look in the registry may only find the last one you've installed. -- http://mail.python.org/mailman/listinfo/python-list
Re: pleac
Am Thu, 04 May 2006 04:05:49 -0700 schrieb jonas: > Hi, > > I'm new to python. > After a search on > http://pleac.sourceforge.net/pleac_python/index.html > why python have a low %? Python has the highest percentage of all languages at pleac. For those who don't know pleac: """Following the great Perl Cookbook (by Tom Christiansen & Nathan Torkington, published by O'Reilly; you can freely browse an excerpt of the book here) which presents a suite of common programming problems solved in the Perl language, this project aims to gather fans of programming, in order to implement the solutions in other programming languages. If successful, this project may become a primary resource for quick, handy and free reference to solve most common programming problems using higher-level programming languages, and for comparison on ease-of-use and power/efficiency of these languages. """ -- Thomas Güttler, http://www.thomas-guettler.de/ E-Mail: guettli (*) thomas-guettler + de Spam Catcher: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Because of multithreading semantics, this is not reliable.
Christophe > Same reason that there is a warning in the "os.access" manual I understand the if file exists open it code. I looked at the os.access documentation and see no "warning" or "not reliable" wording there. 6.1.4 Files and Directories access(path, mode) Olaf -- http://mail.python.org/mailman/listinfo/python-list
Re: Python sample code for PLSQL REF CURSORS
A.M wrote:
> Hi,
>
> I am having hard time to find a sample that shows me how to return an OUT
> REF CURSOR from my oracle stored procedure to my python program. [...]
import cx_Oracle
con = cx_Oracle.connect("me/[EMAIL PROTECTED]")
cur = con.cursor()
outcur = con.cursor()
cur.execute("""
BEGIN
MyPkg.MyProc(:cur);
END;""", cur=outcur)
for row in out_cur:
print row
HTH,
-- Gerhard
--
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