🌐 Mailman 3 August 2004 - Python-list - python.org

Re: Are decorators really that different from metaclasses...
by David Eppstein Aug. 31, 2004

Aug. 31, 2004

In article <mailman.2580.1093800655.5135.python-list(a)python.org>, Paul Morrow <pm_mon(a)yahoo.com> wrote: > Anthony Baxter wrote: > > On Sun, 29 Aug 2004 12:10:13 -0400, Paul Morrow <pm_mon(a)yahoo.com> wrote: > > > >>For example, in the following function def, the comments specify (what I > >>believe is) the author's intention behind each assignment. > >> > >> def circu(diameter): > >> """Info about circu.""" # defines circu.__doc__ > >> __author__ = 'Paul Morrow' # defines circu.__author__ > >> __features__ = memoized # defines circu.__features__ > >> pi = 3.14 # local variable definition > >> return pi * diameter > > > > > > Not in any Python I know of. I look at that and I think "oo, local > > variables". > > > > That you have a different belief doesn't make it right - I remain > > _extremely_ unconvinced. > > > > Anthony > > My belief doesn't make it right, that's true. But I think that a > preponderance of supporting evidence does. > > Have you seen a significant number of cases where a function uses > __xxx__ attributes as local variables? Have you seen any? So we really need to return to the FORTRAN days where variables have different semantics depending on their first character? Anyway, regardless of whether it's a local variable or an attribute, if it's in the function body I expect it to be executed at call time not def time. -- David Eppstein Computer Science Dept., Univ. of California, Irvine http://www.ics.uci.edu/~eppstein/

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use win32 COM in python
by Lin Jingxian Aug. 31, 2004

Aug. 31, 2004

hi, I have a C++ implemented COM server that give out a method like: int read(unsigned char* buf, int lenth), How can I use this method from python? what is the signature? or anyone can tell me how should I design the COM interface so I can use python to read a chunk of bytes from a C++ implemented COM server. thanks.

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Re: Web Application - User Management - RBAC
by kdahlhaus＠yahoo.com Aug. 31, 2004

Aug. 31, 2004

Webware for Python has a component calld 'UserKit.' It may not be fully production ready as it stands, but could serve as a model.

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Re: bad bsddb key/values on large data
by Barry Schiffman Aug. 31, 2004

Aug. 31, 2004

--- Skip Montanaro <skip(a)pobox.com> wrote: > From: Skip Montanaro <skip(a)pobox.com> > Date: Mon, 30 Aug 2004 21:45:28 -0500 > To: Barry Schiffman <schiffo2000(a)yahoo.com> > CC: python-list(a)python.org > Subject: Re: bad bsddb key/values on large data > > > Barry> The largest one, about 200 megs, is > written, and can be read, and > Barry> the strings are correctly formatted -- > but the values attached to > Barry> the keys are wrong ... > > ... > > Barry> Can anyone tell me if there is such a > Python problem or a bsddb > Barry> problem? > > You didn't say what versions of Berkeley DB or > Python you are using. If you > are using Berkeley DB 1.85, problems are to be > expected. Upgrade to a later > version. > > Skip > My apologies, but I wrote this too soon. The chief suspect is an interaction between one of the hash keys and my code. The entire table is shifted ahead on the very first key, so the value for key_1 is saved under key_2, and then so and so forth. The shift stays constant at one step (so key_n contains the record for key_n-1). This only happens with one of the three files. In fact, the code is supposed to reject many of the records in the input, and does so without messing up the key/value pairs -- except for this one. However, I won't be able to check this out until tonight. Anyway, I think the versions are OK (though I'm not sure if the Sleepcat versions are the same as the Berkeley versions). I tried this twice under these setups Python 2.2.2, Sleepycat 3.3.11 on a PC with RH 7.3 Python 2.3.2, Sleepycat 3.2.9 on a PPC with YDL 2.3 Thanks much. Barry __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail

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Boa Constructor error
by parano＠gmail.com Aug. 31, 2004

Aug. 31, 2004

Hi I have a recurrent error in Boa Constructor, especially when I try to activate code completion: a message box reads "UnicodeDecodeError: 'ascii' codec can't decode byte 0xaa in position 52: ordinal not in range(128)" I couldn't find any google resource on that error. I have Python 2.3.3 with Boa Construtor 0.3.1 on Mandrake Linux 10. wxPython is from wxPythonGTK-py2.3-2.5.2.7-RH9.i386.rpm I also tried wxPythonGTK2-py2.3-2.5.2.7-RH9.i386.rpm but had the same error. Those RPMs are from www.wxpython.org where it says that "install and use on my Mandrake 9.2 system without any troubles." Any tip on this? Thanks in advance

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Re: Live conversation between Python and an Excel spreadsheet
by Steve Holden Aug. 31, 2004

Aug. 31, 2004

quadric(a)primenet.com wrote: > Hi, > I have an application that requires that Python initiate and mediate a > live and iterative conversation > between an external application (in which Python is embedded) and an > external Excel > spreadsheet. Python will have to pass info to the spreadsheet, > spreadsheet will make > calculations, Python will obtain results and pass back to application, > application will evaluate > results of spreadsheet calculations and create new set of data and > instructions, Python will pass > new data and instructions to spreadsheet, loop goes on 'n' times until > convergence to solution > or no solution. Python terminates conversation and returns control to > application until next > 'conversation'. > > If I had my choice (which I don't) I would re-code the spreadsheet in > Python, but that is not an > option in this case. > > Is there anyone on the list that has done this before and has an elegant > solution? If so, what Python modules should I look at? Are there any > good Python books out there that have > examples of this? > > I am experienced with Python and have some knowledge of COM objects etc.... > > Any help would be very much appreciated. > > Thanks > > Your best bet would be to interact with Excel as a COM object, as described in the excellent "Python Programming on Win32" by Robinson and Hammond. However, be aware that you'll probably end up ferreting around to find out about undocumented methods of Excel objects, as the docs are often far from complete. regards Steve

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Re: about presicion
by alikakakhel3＠hotmail.com Aug. 31, 2004

Aug. 31, 2004

"Batista, Facundo" <FBatista(a)uniFON.com.ar> wrote in message news:<mailman.2518.1093611862.5135.python-list(a)python.org>... > [alikakakhel3(a)hotmail.com] > > > #- I was wondering if it was posible to get very good presicion. I mean > #- like to the to the 100 th or more decimal place. if so how? > > In Python 2.4 you'll have the Decimal module: > > > Python 2.4a2 (#55, Aug 5 2004, 11:42:43) [MSC v.1310 32 bit (Intel)] on > win32 > ... > >>> import decimal > >>> decimal.getcontext().prec=100 > >>> d = decimal.Decimal(2) > >>> d.sqrt() > Decimal("1.41421356237309504880168872420969807856967187537694807317667973799 > 0732478462107038850387534327641573") > > Enjoy it. > > . Facundo The decimal module comes with python 2.4? I have 2.3, :(, what do I do?

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Re: [IronPython] Jim Hugunin's web log.
by ＠(remove)yahoo.it Aug. 31, 2004

Aug. 31, 2004

David Wilson ha scritto: > For anyone who is excited about IronPython and it's consequences, you > might find Jim Hugunin's web log to be of particular interest. I didn't > see an announcement for this anywhere so here it is: > nice to hear, thanks > Other random thoughts: my experiences of the Python community versus, > eg., the perl community make me believe that Pythonistas are generally > more accepting of commercial solutions than their open source weenie > perl counterparts (*duck*). I'm still unsure as to whether or not this > should be considered a Microsoft marketing strategy for making in-roads > into the "open source scripting market". Imo MS has always played with scripting languages. The Shares Source CLI used perl.exe in its build process (maybe it still does), and IIRC MS owns part of ActiveState. Plus, in a presentation of MSH/Monad/"the new cmd.exe" they mentioned it being 'as powerful as perl ,python or ruby'.

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Re: allowing braces around suites
by Kjetil Torgrim Homme Aug. 31, 2004

Aug. 31, 2004

[Michael Sparks]: > > The solution isn't to change the language in my eyes, the solution > is to produce better tools. After all, the following is legal > syntax in python if you really want close markers: > > end = None > for ch in "hello": > if ch == "l": > print "Rhubarb" > end > print ch, > end that's a really cool trick! perhaps a little prettier than the established "# end if", but like the comment it has no effect on Python's own code validation, so it's strictly not much of an improvement. but it inspired me to beget this evil hack: 1 from block_end import end 2 3 def test(): 4 if True: 5 print 'hello world' 6 end('if') 7 end('def') 8 9 test() when you run this code, you'll get the error message: block_end.IndentationError: Missing if on line 5, end on line 6 the module does _very_ rudimentary parsing of the source code and only flags errors during run-time. I'm not saying this is useful, but it was fun to write :-) since the module is just shy of hundred lines, I'm not including it here. please refer to this URL if you're interested in looking at the implementation. http://heim.ifi.uio.no/~kjetilho/hacks/block_end.py -- Kjetil T.

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Re: Size of a remote URL
by Justin Aug. 31, 2004

Aug. 31, 2004

http://www.google.com/search?hl=en&lr=&ie=UTF-8&safe=off&output=search&num=… Go to that URL. The first two search results do not return a Content-Length Header. Yet IE still knows how big they are somehow, whereas my code doesn't. I tried ethereal however the problem is I don't knwo how to read the packets correctly to udnerstand where the requests are. Thanks for the help.. [None, None, '297984', '31744', '23040'] My tuple ends up looking like that. The last three numbers are correct file sizes.

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