ANN: JpyDbg V0.0.13
JpyDbg is a Python/Jython IDE/Debugging environnement pluggin for JEdit editor.(http://www.jedit.org) Version 0.0.13 of JpyDbg has been released. Check the Home page : http://jpydbg.sourceforge.net for details blog page : http://jpydbg.blogspot.com/ What's new in V0.013 : + IMPROVEMENT: Pylint GUI interface is now available. + IMPROVEMENT : Tiny fixes around PYTHONPATH and some unix machine. Next planified features to come : - profiling - Netbeans IDE plugin module.(More on blog page for this topic) Cheers Jean-Yves -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
ZRS Now Available for FREE 30-day Evaluation
Hi all, We are happy to announce that Zope Corporation is now offering Zope Replication Services (ZRS) in a 30-day evaluation format! For more information and to download the evaluation release, visit: http://customers.zope.com/ZRS/ About ZRS: Zope Replication Services (ZRS) increases the reliability of all Zope enterprise clusters and eliminates the storage system as a single point of failure. Sites with high availability requirements must manage planned and unplanned downtimes. Planned outages include system maintenance, software / operating system upgrades, and backups. Unplanned outages include hardware and network failures. ZRS reduces the downtime associated with these events by replicating and distributing mission-critical data storage across distinct physical storages (possibly in distinct geographic locations). Should a primary storage fail, a secondary storage can take its place. Secondary servers can be taken off-line at any time to undergo repairs, backups, or system upgrades. When a secondary returns to service, it automatically resynchronizes with the primary server. ZRS also improves scalability since secondary servers can optionally provide additional read-only ZEO connections while maintaining their replication functions. ZEO client storages can be configured to connect to any available secondary, and can be load-balanced among the available secondary ZRS servers to implement highly-available and highly-scalable Zope clusters. ZRS is a 'battle-tested' solution that has provided the high-availability and disaster recovery solution critical to large-scale public and internal Zope deployments for years. Premier brands including the VIACOM radio and television group, AARP, Community Newspaper Holdings Inc. (CNHI), and the Joint Intelligence Center, Pacific (JICPAC) rely on ZRS to ensure reliability and scalability for their mission-critical Web sites. The 30-day evaluation release allows organizations to install and operate ZRS on up to five primary ZODB servers and on an unlimited number of secondary servers for up to thirty days. The current evaluation release (ZRS 1.4.2) is compatible with Zope versions 2.4 - 2.7. Full releases of ZRS compatible with Zope 2.8.x and Zope 3.x are also available. Brian Lloyd[EMAIL PROTECTED] V.P. Engineering 540.361.1716 Zope Corporation http://www.zope.com -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: [Info] PEP 308 accepted - new conditional expressions
Ron Adam wrote: It will be A if B else (C if D else F) So this evaluates as if there are parentheses around each section.. Hmm? (A) if (B) else ( (C) if (D) else (F) ) The first 'if' divided the expr, then each succeeding 'if' divides the sub expressions, etc... ? So ... A if B else C + X * Y Would evaluate as... ? A if B else (C + X * Y) and... value = X * Y + A if B else C would be ? value = (X * Y + A) if B else C or ? value = X * Y + (A if B else C) I think I'm going to make it a habit to put parentheses around these things just as if they were required. Yes, that's the best way to make it readable and understandable. Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Re: [Info] PEP 308 accepted - new conditional expressions
Erik Max Francis wrote: Dave Benjamin wrote: Hooray! After years of arguing over which syntax to use, and finally giving up since nobody could agree, the Benevolent Dictator did what only a dictator can do, and just made a damn decision already. Thank you, Guido! =) Yes, hear hear. So what made him change his mind? When the debates raged over PEP 308, he seemed pretty dead set against it (at least by proxy) ... Raymond Hettinger proposed to change the behavior of and/or to return one of their arguments because he had been bitten by the common trap of C and X or Y when X is False. People were positive about it, but said that then a conditional would have to be introduced. So Guido considered it again. He says himself that the greatest problem last time was that no consensus over syntax was reached, and he solved the problem this time by deciding himself. Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Re: [Info] PEP 308 accepted - new conditional expressions
Sam wrote: Jaime Wyant writes: On 9/30/05, Sam [EMAIL PROTECTED] wrote: Reinhold Birkenfeld writes: Hi, after Guido's pronouncement yesterday, in one of the next versions of Python there will be a conditional expression with the following syntax: X if C else Y which is the same as today's (Y, X)[bool(C)] What's wrong with C ? X:Y? Aside from : being overloaded? First thing that comes to my mind is that it is more C-ish (read cryptic) than pythonic (read elegant and understandable). And foo if bar is Perl-ish; yet, even Perl has the ? : operators. Perl's foo if bar is very different to this one, you should know about this. For a conditional, syntax must be found, and the tradition of Python design is not to use punctuation for something that can be solved with keywords. Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Re: [Info] PEP 308 accepted - new conditional expressions
Reinhold Birkenfeld [EMAIL PROTECTED] writes: For a conditional, syntax must be found, and the tradition of Python design is not to use punctuation for something that can be solved with keywords. Yeah, if C then A else B is a ancient tradition stretching from Algol-60 to OCAML, and who knows what all else in between. I'm not sure what Guido saw in the A if C else B syntax but it's not a big deal. -- http://mail.python.org/mailman/listinfo/python-list
Re: [Info] PEP 308 accepted - new conditional expressions
Sam wrote: And foo if bar is Perl-ish; yet, even Perl has the ? : operators. What _isn't_ Perl-ish? -- http://mail.python.org/mailman/listinfo/python-list
Re: what does 0 mean in MyApp(0)
Alex [EMAIL PROTECTED] schrieb im Newsbeitrag
news:[EMAIL PROTECTED]
| Thanks for the replies. It seems that I have three options
| 1. app=MyApp()
| 2. app=MyApp(0)
| 3. app=MyApp('myfile.txt')
|
| 1. In the first case the output stream will be set to stdout/stderr,
| which means that errors will be sent to a window which will be closed
| when the app crashes.
| 2. In the second case the output will be set to the command prompt
| window, which means that I will be able to catch the errors when my app
| crashes.
| 3. There is also a third alternative which is to set the output to a
| file.
|
| Alterbnative 2 is simple and useful, so that's why everybody use that
| alternative.
|
| Is that correct?
Not entirely:
1. app=MyApp(): stdout/stderr is redirected to its own window, so you're
right here
2. app=MyApp(0): stdout/stderr is not redirected to a window.
Tracebacks will show up at the console. So you're right here to...
But:
3(a). app=MyApp(1, 'some/file/name.txt'):
stdout/stderr is redirected to to the file 'some/file/name.txt').
The arguments you pass to MyApp are named parameters, so for improved
readability you may want to use:
3(b). app=MyApp(redirect=1, filename='some/file/name'): will redirect stdout
to 'filespec'
and instead of 2:
2(b). app=MyApp(redirect=0) # stdout/stderr will stay at the console...
Anyway, if you omit the parameter names, make sure you you position them
correctly, i.e., a filename should only be positioned as /second/ argument.
HTH,
--
Vincent Wehren
| Alex
|
--
http://mail.python.org/mailman/listinfo/python-list
Re: Will python never intend to support private, protected and public?
Mike Meyer [EMAIL PROTECTED] writes: Unless your compiler detects and flags passing private variables to external functions all you've got is a convention that you don't pass private variables to external functions. Yes, the point is that it's something that you can check for by examining the class in question without having to examine any other classes. Are you going to try and tell me thas using builtin functions on private variables is something you don't allow in your projects? You have to treat builtin functions as part of the language. Of course Python has this situation where someone could rebind the name len to some other function, so you have to deal with that too, maybe just at the file scope. An OOP approach (lst.len() instead of len(lst)) that binds the builtin names to datatypes might be preferable in some situations but I'll leave that one for the theorists. Of course, there's nothing wrong with catching errors earlier. Might I suggest that you file a change request for pylint (or your favorite error checker) asking that it start issuing warnings for object._variable? I don't see how pylint could know which instances to flag, without doing type inference on all the objects to know that the variable belonged to an instance of some other class. -- http://mail.python.org/mailman/listinfo/python-list
Not defined
When trying the basic tutorial for cgkit I always seem to get a not defined error as follows. Pythonwin GUI from cgkit import * Sphere() Traceback (most recent call last): File interactive input, line 1, in ? NameError: name 'Sphere' is not defined b=Box(name=Cube, pos=(1.5,2,0)) Traceback (most recent call last): File interactive input, line 1, in ? NameError: name 'Box' is not defined I am useing ver 2.4 A little help would be most appreciated. Forgive me please if this is not the proper place for this ? I am trying to keep an active brain :) Regards Gramps -- http://mail.python.org/mailman/listinfo/python-list
Re: A Moronicity of Guido van Rossum
Tony Meyer wrote: X-Spambayes-Classification: ham; 0.008 On 30/09/2005, at 10:56 PM, Gerrit Holl wrote: Tony Meyer wrote: X-Spambayes-Classification: ham; 0.048 Unless I'm misreading things, that's *my* message that scored 0.048 (the from:addr:ihug.co.nz, from:name:tony meyer, and spambayes tokens make it seem that way)... It is, and that's very surprising, but apparantly it was not really hammy enough. But don't worry, by ham_cutoff is 0.2, and out of the 10 'unsure' messages per week, 2 are spam, 2 are ham, and 6 are, well, unsure. Note that with all my mailinglists, the number of messages handled is more than 2500 per week, so I'm very, very happy with spambayes... Gerrit. -- Temperature in Luleå, Norrbotten, Sweden: | Current temperature 05-10-01 09:49:529.7 degrees Celsius ( 49.5F) | -- Det finns inte dåligt väder, bara dåliga kläder. -- http://mail.python.org/mailman/listinfo/python-list
Re: Will python never intend to support private, protected and public?
Steven D'Aprano [EMAIL PROTECTED] writes: A cautionary tale of what happens when religious wars enter programming debates. For all I know, Paul Rubin is intelligent, gentle, kind to animals and small children, generous, charitable and modest. Don't bet on it. But touch his religious belief in the necessity of truly private variables, and boy oh boy does he lose the plot. I haven't claimed necessity (except in some specific types of applications). I've said it's a useful feature in a certain type of development process. So I think you're the one losing the plot and acting like a religious whacko. If there's a feature you don't want to use, nobody is making you use it. You're going off the deep end saying nobody else should be allowed to use it either. Paul misses the point: in a language like Python that allows the dynamic modification of public methods (as well as private ones) you can't be sure with absolute 100% mathematical certainty that your public interface is the same at runtime as it was when you did your last code audit. Obviously any privacy-enforcement mechanism has to cope with that. Think of the situation with Bastion, back when it existed and was believed to sort-of work. If your development team uses test-driven development, you will catch this breakage immediately you check the code in. If you don't, you've got lots more bugs that you don't know about, so one more is no big deal. Methinks you have too much faith in testing. It only shows that your program handles the test cases that you give it. To show that the program handles all the other cases, you need actual logic. Why on earth would you want to unnecessarily introduce random bugs into a word processor or anything else? Paul puts words into my mouth: I never suggested that it was good to introduce bugs, unnecessarily or otherwise. What I said was that aiming for 100% mathematical certainty that there are no bugs in a word processor is pointless. No lives are at stake. The fate of nations doesn't rest on your ability to make sure that PyWord is 100% bug free. Relax dude, the world won't end if there is a bug or two in your code. See: http://vowe.net/archives/005838.html (found with about 5 seconds of Google searching). People could very well have died over disclosures like that, whether caused by software bugs or (as in this instance) by unlucky interaction of intentional features. These things happen over and over. If you look at the NSA's initial release of the Skipjack algorithm spec, it was a PDF file containing a bitmap that was obviously a scan of a fax of a document that had come out of a word processing program. People chuckled that a mighty operation like the NSA could be so technologically backward that they couldn't just put the word processor file directly online. Later they realized that maybe the NSA was simply being careful, that the document had been prepared in a classified environment and they didn't trust their word procssing software to not leak classified info into the file, so they stuck to a policy of only moving data like that around on paper and not in computer files. Information leakage from word processors is a serious problem. Of course, if Paul had been paying attention, he would have realised that 100% certainty is not possible in general no matter what style of development you use. Perhaps folks have heard of the halting problem? You don't know what you're talking about. That is a red herring. You can reduce the probability of bugs by using best practices, but never reduce it to zero. How small do you need? Is it really shocking to suggest that while a one in a billion billion chance of a bug might be needed for a nuclear reactor, we might be satisfied with just one in a million for a word processor? In some ways, word processors are harder to write safely than nuclear reactor code. Nuclear reactors usually run in carefully controlled environments and the field is mature enough that you can have some reasonable confidence that the data going into the program (e.g. from sensors) will be similar to the data that you tested the program with. What you're left with is Murphy's Law: something unexpected could happen by accident and you can make some reasonable assumptions about the distribution of inputs to make sure the probability is low. Ross Anderson calls this programming Murphy's computer. A word processor, on the other hand, has to deal with malicious input, that can be fiendishly crafted in ways that the implementer never dreamed of. It's the difference between worrying about being hit by a meteor at random, and worrying about being hit by a meteor because someone in the asteroid belt is steering them towards you on purpose. Anderson calls this programming Satan's computer. Should we decide that C is not suitable for critical applications? Yes, absolutely. C (by which term I include C++) is unsuitable for critical applications
Recursive Property of Octal Numbers
I'm very curious about what is going on here. I'm sure my curiosity has something to do with ignorance of some fundamental concept of computer science (maybe that 8 is just a vertical infinity?): py b = '\xb6' py b[0] '\xb6' py b[0][0] '\xb6' py b[0][0][0] '\xb6' py b[0][0][0][0] '\xb6' py b[0][0][0][0][0] '\xb6' James -- James Stroud UCLA-DOE Institute for Genomics and Proteomics Box 951570 Los Angeles, CA 90095 http://www.jamesstroud.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Recursive Property of Octal Numbers
On Fri, 30 Sep 2005 15:40:51 -0700, James Stroud wrote: I'm very curious about what is going on here. I'm sure my curiosity has something to do with ignorance of some fundamental concept of computer science (maybe that 8 is just a vertical infinity?): py b = '\xb6' py b[0] '\xb6' py b[0][0] '\xb6' py b[0][0][0] '\xb6' py b[0][0][0][0] '\xb6' py b[0][0][0][0][0] '\xb6' James b is a 1 character string. b[0] is a one character string which is the first character of b. Therefore b[0] == b. -- http://mail.python.org/mailman/listinfo/python-list
Re: Google Not Universal Panacea [was: Re: Where to find python c-sources]
Erik Max Francis wrote: Steve Holden wrote: While a snappish go and look it up on Google might suffice for a mouthy apprentice who's just asked their thirteenth question in the last half hour, it's (shall we say) a little on the brusque side for someone who only appears on the group last February, and has a history of asking reasonably pertinent though sometimes beginner-level questions. I told him exactly where it was. I just also pointed out that he could have trivially found out the answer on his own by using Google for fifteen seconds. It would be one thing if I (and nobody else) answered his question and just rudely pointed him to Google. But since I actually answered his question, looks to me like someone just wanted to stand on his soapbox today. I don't think The source tarball on python.org could claim to be telling him exactly where it was given that my copy of the web site has 341 MB of stuff in it. Just that same, if you are saying that your behaviour didn't really merit my response then I'd probably agree. Your post was the straw that broke the camel's back rather than an egregious example of bad manners. So I'm sorry if it looked as though the soapboxing was directed primarily at you, which it wasn't. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Recursive Property of Octal Numbers
James Stroud [EMAIL PROTECTED] writes: I'm very curious about what is going on here. I'm sure my curiosity has something to do with ignorance of some fundamental concept of computer science (maybe that 8 is just a vertical infinity?): Python doesn't have a character type. A character is just a string of length 1. So 'a'[0] is the same as 'a'. Thus 'a'[0][0][0]...[0] is also the same as 'a'. -- http://mail.python.org/mailman/listinfo/python-list
Re: Google Not Universal Panacea [was: Re: Where to find python c-sources]
Steve Holden wrote: I don't think The source tarball on python.org could claim to be telling him exactly where it was given that my copy of the web site has 341 MB of stuff in it. He doesn't have to search through the whole thing, there's a link on the front page, so this 341 MB figure is meaningless. I certainly understand laziness. I don't approve of it, but I can understand it. But I really don't understand _defending_ laziness. His grasp of the English language was just fine. He could have gotten the answer to his question by using Google with less time and effort than it took him to post to Usenet, wait for a response, and then act on it. Even if he were totally lazy and selfish, he could have gotten the answer more easily by using Google for ten seconds. Language was obviously not a barrier here, since the very words he used in asking the question could have been typed into a search engine to get exactly the answer he wanted. There are plenty of questions that are complex enough, or require knowing the right terminology which might not be obvious to an interested amateur, such that a search engine won't be the most practical way to do research. This was _certainly_ not one of those cases. -- Erik Max Francis [EMAIL PROTECTED] http://www.alcyone.com/max/ San Jose, CA, USA 37 20 N 121 53 W AIM erikmaxfrancis No mistaking / Just reflecting what you radiate -- Anggun -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP 308 accepted - new conditional expressions
Michele Simionato [EMAIL PROTECTED] writes: [...] Guido could have decided two years ago, sparing us the PEP 308 ordalia. So, I am happy that at the end we will have a conditional operator, but I am not happy of how the process worked out. It was just an enormous waste of resources that could have been employed much better :-( Seems that's what Guido thinks too: http://mail.python.org/pipermail/python-dev/2005-September/056561.html | If there's one thing I've learned from the PEP 308 vote, it is that | votes for language don't work. I prefer some discussion on Python-dev | after which I pick one. I think he said at the time that it was an experiment. John -- http://mail.python.org/mailman/listinfo/python-list
Nufox : Xul + Python
Hello, You can test Nufox (with Firefox) at : http://artyprog.no-ip.org Regards -- http://mail.python.org/mailman/listinfo/python-list
Re: pywordnet install problems
hello Steve, I had WordNet 2.0 installed but just now I tried it with 1.7.1 as well and the result was the same. It's a shame, glossing over the pywordnet page really made me want to give it a try. Are there any workarounds you can recommend ? I had a quick look at the wordnet.py file, and it looks readable enough to try and fiddle around with it, but if possible I'd like to avoid having to mess with the source file. Is there any other person / list I can ask for help on this? thanks a lot. vdrab. -- http://mail.python.org/mailman/listinfo/python-list
Re: Where to find python c-sources
John J. Lee wrote: Tor Erik Sønvisen [EMAIL PROTECTED] writes: Erik Max Francis [EMAIL PROTECTED] wrote in message Tor Erik S�nvisen wrote: I need to browse the socket-module source-code. I believe it's contained in the file socketmodule.c, but I can't locate this file... Where should I look? The source tarball, available on python.org. Are people really too lazy to do elementary research on Google? Thanks for the answers... And yes, I have searched google! ... Does google vary in its results across the globe? Aside from Paul Boddie's comment to the effect of yes, there is a very important thing that people forget - *no everyone is as good at using a search engine as others*. People are not simply as good at finding the same information using the same tools as others. You liken the problem to a library. If you understand how a library is laid out, you can find the information alot quicker. If however you're looking in a library for a book on how to create those odd things for computers and you've been told it involves python you're as likely to end up in the fiction section as you are zoology. If you can't figure out the right search terms you need, google can be useless. (That said when that happens to me, I tend to either use kartoo.com or ask a friend) The search terms might be obvious to you, but it simply means your google-fu is strong, and the strong should help the weak. (or not attack them at least...) Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: Not defined
In article [EMAIL PROTECTED], Rob wrote: Forgive me please if this is not the proper place for this ? I am trying to keep an active brain :) Seems proper to me :) You can see what you've just imported by using the built-in dir() function. Here's an example from my PyWin window: dir() ['__builtins__', '__doc__', '__name__', 'pywin'] from math import * dir () ['__builtins__', '__doc__', '__name__', 'acos', 'asin', 'atan', 'atan2', 'ceil', 'cos', 'cosh', 'degrees', 'e', 'exp', 'fabs', 'floor', 'fmod', 'frexp', 'hypot', 'ldexp', 'log', 'log10', 'modf', 'pi', 'pow', 'pywin', 'radians', 'sin', 'sinh', 'sqrt', 'tan', 'tanh'] Note that the first time I use dir() it lists just four items. After from math import * it lists all the stuff I got from the math module in addition. How does your dir() look after the import statement? -- Pekka Henrik Karjalainen -- http://mail.python.org/mailman/listinfo/python-list
Re: Not defined
Rob wrote: When trying the basic tutorial for cgkit I always seem to get a not defined error as follows. Pythonwin GUI from cgkit import * Sphere() Traceback (most recent call last): File interactive input, line 1, in ? NameError: name 'Sphere' is not defined Which version of cgkit are you using? Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: Not defined
I looked around a bit and found the answer. At least the change I recommend below worked for me. In article [EMAIL PROTECTED], Rob wrote: When trying the basic tutorial for cgkit I always seem to get a not defined error as follows. Pythonwin GUI from cgkit import * This is from cgkit.all import * in the tutorial here: http://cgkit.sourceforge.net/doc2/node6.html It seems the tutorial you are using is out of date vis-a-vis the version of cgkit you use. -- Pekka Henrik Karjalainen -- http://mail.python.org/mailman/listinfo/python-list
list.join()... re.join()...? Do they exist? (newbie questions...)
Hi. In some google posts I searched suggested that there was a list.join() thing that I assume works like string.join [which I notice is now deprecated in favour of S.join()] It seems that I have been misled. I start with a text file that I split up to run some formatting over the various sections with re.split. I want to join it back together again with a | delimeter and write it out to a new file. I looked for a re.join, but it seems that doesn't exist. I looked for a list.join after reading the aforementioned posts, but it doesn't seem to exist either. To get it to work I did this: List[0] = list0 List[1] = list1 List[2] = list2 List[3] = list3 cat_list = list0 + '|' + flatblurb + '|' + flatcontents + '|' + flates + '\n' file.write(concat_list) But it seems to me that there is probably something more pythonic than having to go about it in such a laborious fashion Would someone be so kind as to fill me in? TIA! googleboy -- http://mail.python.org/mailman/listinfo/python-list
Re: list.join()... re.join()...? Do they exist? (newbie questions...)
googleboy wrote: To get it to work I did this: List[0] = list0 List[1] = list1 List[2] = list2 List[3] = list3 cat_list = list0 + '|' + flatblurb + '|' + flatcontents + '|' + flates + '\n' file.write(concat_list) But it seems to me that there is probably something more pythonic than having to go about it in such a laborious fashion Indeed. :) cat_list = '|'.join(List) -- Benji York -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Phases of the moon [was Re: A Moronicity of Guido van Rossum]
Steven D'Aprano wrote: A skeptical policeman who says he doesn't actually believe the moon affects behaviour nevertheless reports that last weekend things were really crazy, and it was a full moon. Somebody writes in to correct him: no, the full moon is actually tomorrow. As a similar example: I've been told by various women independently, that there are more babies born near a full moon. So... is there a correlation between insanity and babies being born? :) -- Bart. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3! Finally!
Stefan Behnel wrote: Hi! I just firefoxed to Python.org and clicked on the bz2 link at http://python.org/2.4.2/ and what did I get? Python-3.4.2.tar.bz2 !! Python 3 - what we've all been waiting for, finally, it's there! Weird, though, the md5sum is the same as for the Python-2.4.2.tar.bz2 that I downloaded late (late!) yesterday evening and had forgotten in my download directory... just found it next to the new one... was still there, not overwritten... Well, maybe the changes needed to merit a V3 weren't that big after all... Did you download the file using Firefox? It seems to have a 'feature' that when you download a file and there is already a file of the same name it finds the first number in the filename and increments it. e.g. I just downloaded TortoiseSVN-1.2.4.4479-svn-1.2.3.msi and then immediately re-downloaded it and got TortoiseSVN-2.2.4.4479-svn-1.2.3.msi -- http://mail.python.org/mailman/listinfo/python-list
Re: A Moronicity of Guido van Rossum
the programers in the industry, including bigwigs such as Guido or that Larry Wall fuckhead, really don't know shit about computer languages. Sometimes i get pissed by Stephen Wolfram's megalomaniac cries, but in many ways, i think his statements about the fucking moronicities of the academicians and otherwise dignitaries are justified. here i will try to illuminate some miscellaneous things regarding the lambda in Python issue. as i have hinted ( http://xahlee.org/perl-python/list_comprehension.html ), the so-called List Comprehension is just a irregular syntax to facilitate generating lists. The name is a terrible jargon, and the means is also quite fucked up. The proper name should be something like ListGenerator, and the proper means should be the plain function. For instance, Python's range() is such a list generator, only that it is limited in scope. For a example of a powerful list generator, see Mathematica's Table function: http://documents.wolfram.com/mathematica/functions/Table i'm running a project that will code Table in Perl and Python and Java. You can read about the spec and source code here: http://xahlee.org/tree/Table.html (note: the Python version there isn't complete) Note Table's power in generating not just flat lists, but trees. And if one really want flat lists, there's the Flatten function that flats any nested lists. (Python should have this too) Python's reduce() is Mathematica's Fold. See http://documents.wolfram.com/mathematica/functions/Fold Besides Fold, there's FoldList, FixedPoint, FixedPointList, Nest, NestList and others. In Python's terms, FoldList is like reduce() except it returns a list of each steps. FixedPoint recursively applies a function to itself until the result no longer changes (or when a optional function returns true) Nest is similar except it limits the iteration by a number. The NestList and FixedPointList are similar except that they return a list, containing all the steps. All these can be written as a loop, but they make the code condensed and meaning clear. More so, they are important when programing in a functional style. In functional programing, you don't litter lots of variables or temporary functions or intermediate loops here or there on every other line. The code is usually tight and inline. When sequencing a series of functions, you can't stop in the middle and do some loop or auxiliary calculation. All these are made inline into a function. (that is: constructed as lambda) A block of code usually corresponds to a unit of the algorithm used, as opposed to the particular unit of the implementation of the algorithm. You don't read the minute details of the code. You read the algorithmic unit's comments, or just the input and output of a code block. Also, these inline loop constructs are not just for computing numbers as Guido likes to ignorantly think. They are specialized forms of generic loop constructs. Their first argument is a function, and second argument is a list. Their generality lies with the fact that their first argument is a function. If a language does not provide a convenient way to represent the concept of a function, than these functional loop constructs will suffer in usability. The Python morons, did not provide a convenient way to represent a function. (they tried, with their limited implementation of lambda and shun it like a plaque) The way Guido puts it gives us a nice glimpse of their retarded mentality: “Also, once map(), filter() and reduce() are gone, there aren't a whole lot of places where you really need to write very short local functions;” As we can see here, in Pythoner's mind, lambda is for “very short local functions”. Python's limited lambda coupled with their lambda attitude problem among imperative morons, therefore functional programing suffers in Python, and consequently one becomes so stupid as to come up with a bunch of feelings about lambda, map, reduce, filter. For Python's map(), look at Mathematica's Map on how it might be extended. http://documents.wolfram.com/mathematica/functions/Map Note the ability to map to not just flat lists but trees (nested lists). Note the power of expressing the concept of levels of a tree. For Python's filter(), check out the equivalent in Mathematica's Select: http://documents.wolfram.com/mathematica/functions/Select Note how it provides a third option for picking just the first n items. Also note, that Select is just a way to pick elements in a list. Mathematica provides a set to do these: Part, Take, Drop, Select, Cases. All uniformly uses the function syntax and all operate semantically by returning a new list. In Python and other imperative clown's language, usually they provide a limited varieties to do such a task, and also inconsistent like piled on. (e.g. alist[5:9], filter(), alist.remove(...), del alist[...]). Some modify the list in-place, some returns a new list. - one is quite sorry to read a big shot contemplating on
Re: Help with syntax warnings
Well I've been experimenting with the warning filter and it doesn't seem to be working. . .I think it has something to do with the fact that warnings are issued during the compiling and not during the excecution. . .So the filter would come in to late to block them? Any ideas? -Ivan _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with syntax warnings
Ivan Shevanski wrote: Well I've been experimenting with the warning filter and it doesn't seem to be working. . .I think it has something to do with the fact that warnings are issued during the compiling and not during the excecution. . .So the filter would come in to late to block them? Any ideas? fix your code. fixing syntaxwarnings is almost always trivial; most of the time, all you have to do is to remove (or rephrase) some statement that doesn't do what you think it does anyways... if you really cannot motivate yourself to fix your code, you have to add an extra bootstrap module. if your program is named myprogram.py, rename that file to myactualprogram.py, and add a myprogram.py that looks like this: # File: myprogram.py import warnings warnings.simplefilter(ignore, SyntaxWarning) import myprogram (you may have to fix any __name__ == __main__ clauses in your original program). but you really should fix your program, instead of wasting time on stupid workarounds. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: [Info] PEP 308 accepted - new conditional expressions
Leif K-Brooks writes: Sam wrote: And foo if bar is Perl-ish; yet, even Perl has the ? : operators. What _isn't_ Perl-ish? BASIC? pgp7WNg5zZz7a.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: A Moronicity of Guido van Rossum
(posted c.l.python ONLY) Xah (may i call you Xah?) SOrry to say, but your older posts were much funnier: http://groups.google.com/group/comp.lang.lisp/browse_frm/thread/15f7015d23a6758e/9ee26da60295d7c8?lnk=stq=rnum=5hl=en#9ee26da60295d7c8 (also seems your anti-cult cult really hasn't gotten a lot of followers. You might want to change password on your email account and this time not give it out to all your friends. Anyway, good luck in all your future endeavors. Um, don't have to keep in touch, tho. Xah Lee wrote: the programers in the industry, including bigwigs such as Guido or that Larry Wall fuckhead, really don't know shit about computer languages. -- http://mail.python.org/mailman/listinfo/python-list
Re: [Info] PEP 308 accepted - new conditional expressions
Reinhold Birkenfeld wrote: Ron Adam I think I'm going to make it a habit to put parentheses around these things just as if they were required. Yes, that's the best way to make it readable and understandable. Reinhold Now that the syntax is settled, I wonder if further discussion on the contextual behavior could be done? Or maybe it was already done off line or in private email? To me the advantage of a if b else c form is the easy chaining to build up a sum of conditional parts, where each next part is dependent on the previous result. The advantage of the nested form, is it can be used in place of an if-elif-else structure. But I think the (a if b else c) syntax doesn't match that behavior very well so I was expecting the default behavior to be the sequential chaining and not nested evaluation. But of course, by explicitly placing parentheses, you can do either. Shrug Cheers, Ron -- http://mail.python.org/mailman/listinfo/python-list
Re: Will python never intend to support private, protected and public?
Paul Rubin http://[EMAIL PROTECTED] writes: Mike Meyer [EMAIL PROTECTED] writes: Unless your compiler detects and flags passing private variables to external functions all you've got is a convention that you don't pass private variables to external functions. Yes, the point is that it's something that you can check for by examining the class in question without having to examine any other classes. That's a pretty restrictive convention to follow. For instance, I might want an error dialog to be a private variable of a class representing a window - after all, I don't want anyone else writing to it, or using it in any way. Except, of course, for any GUI framework routines I have to pass it to in order to use it. This problem crops up for every utility routine in every library I might want to use. Opening files by name, concatenatting strings (or are we going to have a convention that implicit invocation of functions with the operator syntax don't count, and another one that you don't overload operators with destructive functions, and so on), etc. So it turns out that getting the behavior you desire involves following a lot of conventions. I you going to try and tell me thas using builtin functions on private variables is something you don't allow in your projects? You have to treat builtin functions as part of the language. Of course Python has this situation where someone could rebind the name len to some other function, so you have to deal with that too, maybe just at the file scope. File scope isn't good enough for python. import madhouse madhouse.len = my_len_breaker fool = madhouse.Fool() print fool.break() and fool._foo is broken again. An OOP approach (lst.len() instead of len(lst)) that binds the builtin names to datatypes might be preferable in some situations but I'll leave that one for the theorists. In other words, to get this to work the way you want, you need yet another convention - this one being about how one goes about writing utility functions. It may be that you can design a language and support libraries so that the compiler can enforce all your conventions. There are languages that try to do that. I recall one I ran into in the 70s that distinguished between functions (which returned values) and procedures (which had side effects), and the compiler enforced (or tried to) the distinction. I think you'd need something like that. But that isn't what we've got. What we've got is Python. Which means you need a whole boatload of conventions to make this work the way you want. In other words, by adding private to python, you're making it so that bugs involving overwriting a private attribute will involve only the owning classes code so long as everyone follows the conventions that exist about the use of such variables. This should be contrasted with the current situation, where bugs that involve overwriting an _-prefixed attribute will involve only the owning classes code so long as everyone follows the conventions that exist about the use of such variables. Yeah, I guess private makes things a lot better. Of course, there's nothing wrong with catching errors earlier. Might I suggest that you file a change request for pylint (or your favorite error checker) asking that it start issuing warnings for object._variable? I don't see how pylint could know which instances to flag, without doing type inference on all the objects to know that the variable belonged to an instance of some other class. I was thinking it would flag any use of such a variable where the target variable wasn't self. That may be a stronger constraint than you wanted - but that's good, right? mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: Nufox : Xul + Python
Oops: http://artyprog.noip.org:8080 -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Phases of the moon
Bart Lateur [EMAIL PROTECTED] writes: Steven D'Aprano wrote: A skeptical policeman who says he doesn't actually believe the moon affects behaviour nevertheless reports that last weekend things were really crazy, and it was a full moon. Somebody writes in to correct him: no, the full moon is actually tomorrow. As a similar example: I've been told by various women independently, that there are more babies born near a full moon. So... is there a correlation between insanity and babies being born? :) If what they say is true, then yes, there is. That doesn't mean there's a logical - or even rational - explanation for that correlation. mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Phases of the moon [was Re: A Moronicity of Guido van Rossum]
Bart Lateur wrote: As a similar example: I've been told by various women independently, that there are more babies born near a full moon. That's also a myth. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Nufox : Xul + Python
Hi, Oops: http://artyprog.noip.org:8080 Again Oops: :)) http://artyprog.no-ip.org:8080 Best regards, Lars -- http://semagia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with syntax warnings
Ivan Shevanski wrote: Well I've been experimenting with the warning filter and it doesn't seem to be working. . .I think it has something to do with the fact that warnings are issued during the compiling and not during the excecution. . .So the filter would come in to late to block them? Any ideas? $ cat syntaxwarning.py def f(): x = 42 global x $ python2.4 syntaxwarning.py syntaxwarning.py:1: SyntaxWarning: name 'x' is assigned to before global declaration def f(): Method 1: precompile the py-file and then invoke the compiled variant: $ python2.4 -c 'import syntaxwarning' syntaxwarning.py:1: SyntaxWarning: name 'x' is assigned to before global declaration def f(): $ python2.4 syntaxwarning.pyc Method 2: switch off the warning: $ python2.4 -Wignore::SyntaxWarning syntaxwarning.py Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Phases of the moon [was Re: A Moronicity of Guido van Rossum]
Paul F. Dietz wrote: Bart Lateur wrote: As a similar example: I've been told by various women independently, that there are more babies born near a full moon. That's also a myth. Right, everybody knows that it's not natural (moon) light that influences reproductive behavior, it's artificial light -- TV. When TV is turned off by a power failure, lots of people that usually never have sex start making love, and lots of people that usually use contraception lose their minds and forget about it. 9 months later more babies are born, unless that's also a myth. -- We're glad that graduates already know Java, so we only have to teach them how to program. somewhere in a German company (credit to M. Felleisen and M. Sperber) -- http://mail.python.org/mailman/listinfo/python-list
Re: Will python never intend to support private,protected and public?
On 30 Sep 2005 15:00:39 -0700 Paul Rubin wrote: Rocco Moretti [EMAIL PROTECTED] writes: There is little in the way of technical problems that are solved by language level enforcement of private variables. The issues in question are mostly social ones, and if you're not reading and following the documented interface, stopping private variable access is not going to prevent most of your problems. Well, that says you consider both code auditing and debugging to be social problems rather than technical ones. Maybe that's reasonable, By the way, any programming language is a social issue; only machine code is technical. -- jk -- http://mail.python.org/mailman/listinfo/python-list
Re: [Info] PEP 308 accepted - new conditional expressions
On Fri, 30 Sep 2005 21:28:26 -0400 Terry Reedy wrote: The lesson for me is to spend much less time on Python discussion and much more on unfinished projects. So even if I never use the new syntax, I will have gained something ;-) QOTW? -- jk -- http://mail.python.org/mailman/listinfo/python-list
Re: Will python never intend to support private, protected and public?
On 30 Sep 2005 22:11:46 + John J. Lee wrote: Steve Holden [EMAIL PROTECTED] writes: That would make a good Onion (www.TheOnion.com) headline: Users Discover Computer Security Conflicts with Desire for Convenience :-) The Onion, yay. Area Man Forgets Work Password, Will Employ Post-It Notes in Future Sure. It would be fun to read something about Consenting Adults there, too. -- jk -- http://mail.python.org/mailman/listinfo/python-list
Printing and prompting adds a mysterious extra space
Evening... I'm writing a simple interactive program to maintain a database. The goal was to print at the beginning of the line, wait for user input and then deal with it. Minimal test program: import sys; print , ; print sys.stdin.readline() However when I run the program and enter foobar it looks like this: ./test.py foobar foobar ^--- where does this space come from? I wonder where the space comes from in the line where I print what the user typed. Does it have to do with the , after the print which I use to suppress the newline? Any ideas? Regards Christoph -- I'm still confused - just on a higher level now. ~ ~ .signature [Modified] 1 line --100%--1,48 All -- http://mail.python.org/mailman/listinfo/python-list
Re: Nufox : Xul + Python
Nufox seems a really interesting thing (probably it can even be used to design GUIs for local desktop apps), but the site seems down at the moment. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Phases of the moon
Bart Lateur [EMAIL PROTECTED] writes: As a similar example: I've been told by various women independently, that there are more babies born near a full moon. So... is there a correlation between insanity and babies being born? :) If you weren't insane before the baby was born, you will be soon after. ;-) sherm-- -- Cocoa programming in Perl: http://camelbones.sourceforge.net Hire me! My resume: http://www.dot-app.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Not defined
Thanks for the replies gives me something to chew on. Regards Gramps -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing and prompting adds a mysterious extra space
Christoph Haas wrote: Evening... I'm writing a simple interactive program to maintain a database. The goal was to print at the beginning of the line, wait for user input and then deal with it. Minimal test program: import sys; print , ; print sys.stdin.readline() However when I run the program and enter foobar it looks like this: ./test.py foobar foobar ^--- where does this space come from? I wonder where the space comes from in the line where I print what the user typed. Does it have to do with the , after the print which I use to suppress the newline? Any ideas? Another question you could ask is: why is there NO space after the ''? Have a look at this. import sys print , s = sys.stdin.readline() print len(s) print s for i in s: print ord(i),i Instead of printing the input, I'm assigning it to a variable. Notice that the extra space appears on the next print statement and is not part of the input. this is verified by showing that the input has exactly 4 characters and is huh\n. huh 4 huh 104 h 117 u 104 h 10 So it looks like the space was sitting in the output buffer. Regards Christoph -- I'm still confused - just on a higher level now. ~ ~ .signature [Modified] 1 line --100%--1,48 All -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: Phases of the moon [was Re: A Moronicity of Guido van Rossum]
Ulrich Hobelmann [EMAIL PROTECTED] writes: When TV is turned off by a power failure, lots of people that usually never have sex start making love, and lots of people that usually use contraception lose their minds and forget about it. 9 months later more babies are born, unless that's also a myth. http://www.snopes.com/pregnant/blackout.htm Despite initial reports of New York City hospitals' seeing a dramatic increase in the number of births nine months after the 1965 blackout, later analyses showed the birth rate during that period to be well within the norm. -- http://mail.python.org/mailman/listinfo/python-list
Re: Zope3 Examples?
If you're experimenting with frameworks, try out django. I've only completed a few parts of the tutorial. However, what amazes me is how much I got for so little code. It's slick. http://www.djangoproject.com/ jw On 9/30/05, Markus Wankus [EMAIL PROTECTED] wrote: Gerhard Häring wrote: Markus Wankus wrote: [...] Thanks for the reply - maybe I'll give it another shot. I'm currently demoing Snakelets. Quite a turn in the opposite direction, but small and super-easy to get going with. [...] I also found Snakelets a pleasure to use and chose it for implementing a clan homepage in early 2005. I'm still very interested in the Python/Web/RDBMS field and tried to follow the developments since then. I didn't actually build anything real, only played a little bit with CherryPy and the megaframeworks built upon, Subway and TurboGears. If I had to choose again, I'd use TurboGears, despite the fact that it's very young and still developing. -- Gerhard Good to know. I have watched the screencast for Turbogears but haven't tried it yet. There seemed to be a lot of magic methods going on there, and you could tell the guy doing the screencast had done that more than once. ;o) I guess once you run through the manual it would all make sense. I figure I'll give Snakelets a good go first. Is your Snakelets-based page up and accessible somewhere? Markus. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing and prompting adds a mysterious extra space
On Sat, Oct 01, 2005 at 01:17:41PM -0700, [EMAIL PROTECTED] wrote: Christoph Haas wrote: I'm writing a simple interactive program to maintain a database. The goal was to print at the beginning of the line, wait for user input and then deal with it. Minimal test program: import sys; print , ; print sys.stdin.readline() However when I run the program and enter foobar it looks like this: ./test.py foobar foobar ^--- where does this space come from? Another question you could ask is: why is there NO space after the ''? Have a look at this. [...] So it looks like the space was sitting in the output buffer. Yes, probably. But how do I get that buffer flushed? I tried sys.stdout.flush() after the print statement but it wasn't printed, either. I probabl need something like... print + instead of print , How could I solve that decently? Christoph -- I'm still confused - just on a higher level now. ~ ~ .signature [Modified] 1 line --100%--1,48 All -- http://mail.python.org/mailman/listinfo/python-list
Re: Nufox : Xul + Python
Lars Heuer wrote: Oops: http://artyprog.noip.org:8080 Again Oops: :)) http://artyprog.no-ip.org:8080 Looks intriguing, but the examples on the site won't work for me. I suspect they won't for anyone else either, because the code in the webpages appears to try and contact a server in a private address space, specifically 192.168.0.40. Which is a pity, because it looks interesting :-) Regards, Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing and prompting adds a mysterious extra space
Use sys.stdout.write instead of print. It will solve these problems you are having. If you really want to know what's going on, read the language manual, http://docs.python.org/ref/print.html It explains the behavior of this extra space, which is output by a successive 'print' statement. The implementation uses an attribute called 'softspace', which is described in http://docs.python.org/lib/bltin-file-objects.html Jeff pgpRTjpCVfUyv.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: Class Help
Ivan Shevanski wrote: To continue with my previous problems, now I'm trying out classes. But I have a problem (which I bet is easily solveable) that I really don't get. The numerous tutorials I've looked at just confsed me.For intance: class Xyz: ... def y(self): ... q = 2 ... Xyz.y() Traceback (most recent call last): File stdin, line 1, in ? TypeError: unbound method y() must be called with Xyz instance as first argument (got nothing instead) So. . .What do I have to do? I know this is an extremley noob question but I think maybe if a person explained it to me I would finally get it =/ thanks in advance, -Ivan Generally you don't use class's directly. Think if them as templates for objects. Then you can use that class (template) to create many objects. To create an object just call the class and assign the result to a name. xyz = Xyz() xyz.y() Also, In your example 'q' is assigned the value 2, but as soon as the method 'y' exits, it is lost. To keep it around you want to assign it to self.y. class Xyz(object): # create an class to create an object instance. def y(self) self.q = 2 xyz = Xyz() xyz.y() print xyz.q # prints 2 Cheers, Ron -- http://mail.python.org/mailman/listinfo/python-list
Re: Class Help
On Sat, 2005-10-01 at 18:58 -0400, Ivan Shevanski wrote: To continue with my previous problems, now I'm trying out classes. But I have a problem (which I bet is easily solveable) that I really don't get. The numerous tutorials I've looked at just confsed me.For intance: class Xyz: ... def y(self): ... q = 2 ... Xyz.y() Traceback (most recent call last): File stdin, line 1, in ? TypeError: unbound method y() must be called with Xyz instance as first argument (got nothing instead) So. . .What do I have to do? I know this is an extremley noob question but I think maybe if a person explained it to me I would finally get it =/ When you define a class, say Xyz, your are defining your own type. Say that Person is a class. And person has a method walk(): class Person: def walk(self): ... now to use the Person class, you need to create an instance of it. You can't just say Person.walk() because Person is a classification, not a real object. You need an instance of person. jane = Person() This creates a new person called jane. jane is an instance of the class Person. jane __main__.Person instance at 0x2c723710 Now we can tell jane to walk: jane.walk() So what the error is telling you (in a bit confusing way if you're a newbie) is that you are calling a method y() but you have not created an instance of your Xyz class to do y(). Or, to use my analogy, you are telling Person to walk, but you can't make Person walk, you have to create a person, jane, and have jane walk. Hope this helps, but I recommend you read a good intro to object-oriented programming. -a -- http://mail.python.org/mailman/listinfo/python-list
Re: Class Help
You have to crate an instanciation of the class before you can use one. So you want to do: instance = Xyz() instance.y() You won't get any output though, might want to do: class Xyz: def y(self): print 'y worked!' it's more satisfying :) Basically, look into the difference between a class, and the INSTANCE of a class. Cheers, J.F. Ivan Shevanski wrote: To continue with my previous problems, now I'm trying out classes. But I have a problem (which I bet is easily solveable) that I really don't get. The numerous tutorials I've looked at just confsed me.For intance: class Xyz: ... def y(self): ... q = 2 ... Xyz.y() Traceback (most recent call last): File stdin, line 1, in ? TypeError: unbound method y() must be called with Xyz instance as first argument (got nothing instead) So. . .What do I have to do? I know this is an extremley noob question but I think maybe if a person explained it to me I would finally get it =/ thanks in advance, -Ivan _ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ -- http://mail.python.org/mailman/listinfo/python-list
Background process for ssh port forwarding
Hello all,
I'm writing a script which will backup data from my machine to a server
using rsync. It checks to see if I am on the local network. If I am, it
runs rsync over ssh to 192.168.2.6 using the pexpect module to log in.
That's the easy part.
Now, when I'm not on the local network, I first want to open up an ssh
connection to do port forwarding, so something like this:
def hostforward():
#This is based on the assumption that the passfile is the gnus
#authinfo file, or has a similar format...
f = open(PASS_FILE, r)
f_list = f.read().split(' ')
f.close()
#Now, we get the entry after password (be slicker to make it a
#dictionary, but maybe wouldn't work as well).
pass_index = f_list.index('password') + 1
forwardpass = f_list[pass_index]
#now we connect
command = 'ssh -l %s -L 2022:%s:22 %s' % \
(login, my_server, forwarding_server)
connection = pexpect.spawn(command)
connection.expect('.*assword:')
connection.sendline(forwardpass)
If I end this with 'connection.interact()', I will end up logged in to the
forwarding server. But what I really want is to go on and run rsync to
localhost port 2022, which will forward to my_server port 22. So, how can
I put the ssh connection I set up in hostforward() in the background?
I need to make sure that connection is made before I can run the rsync
command.
I've looked at threading, but that seems excessive. There must be an
easier way. Whatever I do, though, I'll need to use pexpect to spawn the
processes, since I'll need to log in to ssh servers with a password.
Thanks for any help.
--Jesse
--
http://mail.python.org/mailman/listinfo/python-list
Re: Class Help
Ron Adam wrote: Also, In your example 'q' is assigned the value 2, but as soon as the method 'y' exits, it is lost. To keep it around you want to assign it to self.y. Ooops, That should say ... To keep it around you want to assign it to self.q. ---self.q Cheers, Ron -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing and prompting adds a mysterious extra space
On Sat, Oct 01, 2005 at 05:09:48PM -0500, [EMAIL PROTECTED] wrote: Use sys.stdout.write instead of print. It will solve these problems you are having. If you really want to know what's going on, read the language manual, http://docs.python.org/ref/print.html It explains the behavior of this extra space, which is output by a successive 'print' statement. The implementation uses an attribute called 'softspace', which is described in http://docs.python.org/lib/bltin-file-objects.html Thank you for the technical explanation. print a,b is nice to read in simple Python programs. But when you need to get more control of I/O it's better to know what's really happening inside. So the softspace is always added after a print a, statement but only printed if Python thinks it is not at the beginning of a terminal line. Interesting. Again, thanks. I'll rest my case. Christoph -- I'm still confused - just on a higher level now. ~ ~ .signature [Modified] 1 line --100%--1,48 All -- http://mail.python.org/mailman/listinfo/python-list
Re: A rather unpythonic way of doing things
On Thu, 29 Sep 2005, Peter Corbett wrote: One of my friends has recently taken up Python, and was griping a bit about the language (it's too prescriptive for his tastes). In particular, he didn't like the way that Python expressions were a bit crippled. So I delved a bit into the language, and found some sources of syntactic sugar that I could use, and this is the result: http://www.pick.ucam.org/~ptc24/yvfc.html It's this sort of thing that makes it clear beyond all shadow of a doubt that Cambridge should be razed to the ground. Keep up the good work. tom -- I'm not quite sure how that works but I like it ... -- http://mail.python.org/mailman/listinfo/python-list
Re: User-defined augmented assignment
On Thu, 29 Sep 2005, Pierre Barbier de Reuille wrote: a discussion began on python-dev about this. It began by a bug report, but is shifted and it now belongs to this discussion group. The problem I find with augmented assignment is it's too complex, it's badly explained, it's error-prone. And most of all, I don't see any use-case for it ! The most common error is to consider that : a += b == a.__iadd__(b) when the truth is : a += b == a = a.__iadd__(b) which can be very confusing, as the two a are not necessarily the same. Indeed. I certainly didn't realise that was how it worked. So, what I would suggest is to drop the user-defined augmented assignment and to ensure this equivalence : a X= b = a = a X b with 'X' begin one of the operators. That seems quite an odd move. Your proposal would lead to even more surprising behaviour; consider this: a = [1, 2, 3] b = a a += [4, 5, 6] print b At present, this prints [1, 2, 3, 4, 5, 6]; if we were to follow your suggestion, it would be [1, 2, 3]. So, -1, i'm afraid. I think the right solution here is staring us in the face: if everyone seems to think that: a += b == a.__iadd__(b) Then why not make it so that: a += b == a.__iadd__(b) Principle of Least Surprise and all that. Since not everything that should support += is mutable (integers, for example), how about saying that if the recipient of a += doesn't have an __iadd__ method, execution falls back to: a = a + b I say 'a + b', because that means we invoke __add__ and __radd__ appropriately; indeed, the __add__ vs __radd__ thing is a precedent for this sort of fallback. Doesn't that leave everyone happy? tom -- I'm not quite sure how that works but I like it ... -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3! Finally!
On Fri, 30 Sep 2005, Stefan Behnel wrote: I just firefoxed to Python.org and clicked on the bz2 link at http://python.org/2.4.2/ and what did I get? Python-3.4.2.tar.bz2 !! Python 3 - what we've all been waiting for, finally, it's there! Not only that, but they've skipped the tiresome 3.0.x early release teething phase and gone straight to the mature, solid-as-a-rock middle releases! God, i love python! Hey, and it's still got lambdas! WE WON!!! tom -- I'm not quite sure how that works but I like it ... -- http://mail.python.org/mailman/listinfo/python-list
Re: Class Help
On Sat, 01 Oct 2005 18:58:45 -0400, Ivan Shevanski wrote: To continue with my previous problems, now I'm trying out classes. But I have a problem (which I bet is easily solveable) that I really don't get. The numerous tutorials I've looked at just confsed me.For intance: [code snipped] You have to keep in mind the difference between a class and an instance of a class. To make an analogy with real life, a class is like the idea of dogs in general and an instance is a specific dog (like Ol' Yella, or Rin Tin Tin, or or that little beagle on the Enterprise). Normally you create a class, then make one or more instance of the class, and work with the instances. Some terminology for you to learn: when you create a function inside a class, it is called a class method, or just method. Functions and methods are not exactly the same, but for now the differences don't concern us. So, you create a class with a single method: class Klass: def spam(self): return spam * 5 Notice that the first argument of the method is always self, even when you don't need any arguments. Klass is an object, and you can call Klass.spam() if you like, but it will fail because you haven't included an argument for self. self must be an instance of Klass. So you could do this: spam_maker = Klass() # create an instance print Klass.spam(spam_maker) which will print spam spam spam as expected. But that's doing extra work. Once you have your instance, you can just call the method as if it were a normal function: print spam_maker.spam() and it will work the way you expect it to. Behind the scenes, Python passes a copy of spam_maker to spam_maker.spam() for you. It can do that because spam_maker is an instance. A class is a description of how a type of object should work, but you normally don't work directly on that high-level description. Normally you will work with individual instances, not the class itself. When Timmy falls down the well, you tell Rin Tin Tin to go get help, not dogs in the general. Python built in objects like lists, strings, ints etc are special types of classes built into the language. Here is how we might create a (very inefficient!) Python implementation of list: class MyList: # Class attributes: left_delimiter = [ right_delimiter = ] item_delimiter = , # Class methods: def __init__(self, *arguments): Create a new instance and fill it with arguments. self.data = arguments # create an instance attribute def __str__(self): Convert instance to a string for printing. holder = self.left_delimiter for item in self.data: holder = holder + str(item) + self.item_delimiter holder = holder + self.right_delimiter return holder def append(self, obj): Append an object to the instance. self.data.append(obj) # real lists have many more methods... Hope this helps. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: Soap Question (WSDL)
Thanks for the comment everyone. I was considering to write my own soap interface to Flickr as apposed to use the ready to go libraries for Flickr as Fredrik pointed out. I got to get FlickrClient to work. Nonetheless, I am excited to use soap services for my needs. Thanks for your support, Armin -- http://mail.python.org/mailman/listinfo/python-list
How is wxWindows related to Python?
My question will sound daft to the good old craftsmen, but they will excuse my nescience on the subject. I come new to the Pythonic world from the land of .NET languages, VB6 and some familiarity in C and C++. I just read about wxWindows last night. From my understanding, it is a GUI framework like MFC that lets you create UI apps with ease calling a standard set of API accross multiple platforms (unlike MFC) and if the Windows port is complementary to MFC in that it shields you from calling the Win32 API directly. However, I do not understand its correlation with Python. The documentation page says, wxWindows 2.4.2: A portable C++ and Python GUI toolkit. So, my question is, How is wxWindows related to Python? -- http://mail.python.org/mailman/listinfo/python-list
Re: PyWin SendMessage
Gonzalo Monzón [EMAIL PROTECTED] wrote: Hi Gerd, I'm not really sure of, but I think you must use a message value in range of WM_USER or WM_APP so this fact maybe let the receiver window getting bad data... No. WM_COPYDATA is designed specifically for his use case -- interprocess communication. The WM_USER range is only if you are inventing a custom message for some new purpose. -- - Tim Roberts, [EMAIL PROTECTED] Providenza Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
Re: How is wxWindows related to Python?
That is a reference to wxPython. wxPython is a thin wrapper around the wxWidgets c++ library. But really, it has grown quite a bit lately and has a bunch of neato widgets that aren't included with wxWidgets c++. Visit www.wxpython.org. jw On 1 Oct 2005 18:36:06 -0700, Sathyaish [EMAIL PROTECTED] wrote: My question will sound daft to the good old craftsmen, but they will excuse my nescience on the subject. I come new to the Pythonic world from the land of .NET languages, VB6 and some familiarity in C and C++. I just read about wxWindows last night. From my understanding, it is a GUI framework like MFC that lets you create UI apps with ease calling a standard set of API accross multiple platforms (unlike MFC) and if the Windows port is complementary to MFC in that it shields you from calling the Win32 API directly. However, I do not understand its correlation with Python. The documentation page says, wxWindows 2.4.2: A portable C++ and Python GUI toolkit. So, my question is, How is wxWindows related to Python? -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: How is wxWindows related to Python?
Sathyaish wrote: However, I do not understand its correlation with Python. The documentation page says, wxWindows 2.4.2: A portable C++ and Python GUI toolkit. So, my question is, How is wxWindows related to Python? Pure wxWindows (actually it's been renamed wxWidgets at the demand of Microsoft) is for C++. You're looking for wxPython: http://wxpython.org/ -- Benji York -- http://mail.python.org/mailman/listinfo/python-list
Re: How is wxWindows related to Python?
I guess it is referring to the closely related (maybe even same dev group? I don't know why the wxWindows docs would mention Python unless they specifically support the wxPython project, too.) wxWindows + Python = wxPython wxPython is a Python extension module that provides a set of bindings from the wxWindows library to the Python language. In other words, the extension module allows Python programers to create instances of wxWindows classes and to invoke methods of those classes. More from this Chapter: · Using Tkinter · Using PythonWin The wxPython extension module attempts to mirror the class hierarchy of wxWindows as closely as possible. This means that there is a wxFrame class in wxPython that looks, smells, tastes, and acts almost the same as the wxFrame class in the C++ version. wxPython is close enough to the C++ version that the majority of the wxPython documentation is actually annotations to the C++ documentation that describe the places where wxPython is different. There is also a series of sample programs included, and a series of documentation pages that assist the programmer in getting started with wxPython. http://www.onlamp.com/pub/a/python/excerpts/chpt20/wxpython.html http://www.wxpython.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Class Help
Ivan Shevanski wrote: To continue with my previous problems, now I'm trying out classes. But I have a problem (which I bet is easily solveable) that I really don't get. The numerous tutorials I've looked at just confsed me.For intance: class Xyz: ... def y(self): ... q = 2 ... Xyz.y() Traceback (most recent call last): File stdin, line 1, in ? TypeError: unbound method y() must be called with Xyz instance as first argument (got nothing instead) So. . .What do I have to do? I know this is an extremley noob question but I think maybe if a person explained it to me I would finally get it =/ You have to create an instance of the class before it can be called. Ex: class foo: def bar(self): print Hello, World! foo().bar() This is because foo is a reference to a classobj, however, when you call the class, it becomes an instance. Ex: type(foo) type 'classobj' type(foo()) type 'instance' When an instance is created it tells Python to pass the instance as the first argument (self). Otherwise it gives it None or something similer. (Note that im not 100% sure about why it does'nt work, im just guessing from the way it _seems_ to work. I have read no documentation on this. If you want it to work before you create an instance, then you can do that with class foo: @classmethod def bar(self): print Hello, World! or the older (but exactly the same): class foo: def bar(self): print Hello, World! bar = classmethod(bar) thanks in advance, -Ivan HTH, Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: How is wxWindows related to Python?
Thanks, guys. -- http://mail.python.org/mailman/listinfo/python-list
Re: Recursive Property of Octal Numbers
James Stroud [EMAIL PROTECTED] writes: I'm very curious about what is going on here. I'm sure my curiosity has something to do with ignorance of some fundamental concept of computer science (maybe that 8 is just a vertical infinity?): py b = '\xb6' py b[0] '\xb6' py b[0][0] '\xb6' Maybe this clarifies things? b='a' b[0] 'a' b[0][0] 'a' b[0] == b True Dan -- http://mail.python.org/mailman/listinfo/python-list
