🌐 Mailman 3 January 2006 - Python-list - python.org

Re: python coding contest
by Claudio Grondi Jan. 2, 2006

Jan. 2, 2006

> Please send me comments, suggestions and ideas. Now, after the contest is over I analysed the outcome of it and have come to the conclusion, that there were two major factors which contributed to squeezing of code: (1). usage of available variants for coding of the same thing (2). sqeezing the size of used numeric and string literals As (1) leads to less readable cryptic code it makes not much sense from my point of view to dig deeper in that direction. As already mentioned in this thread by Tim Peters ( pointing to http://spoj.sphere.pl/problems/KAMIL/ ) it seems, that Pearl is here the proper language of choice for such kind of problems anyway. Trying to improve on (2) belongs in my eyes much more into the area of problems discussed in comp.compression than to problems belonging into comp.lang.python . So what is my point? Ok, I will mention it at the end of this post. Before that I want to thank the originators of the contest and especially the participants for providing insight into the techniques they have used. I have learned from the contest what lambda expression is good for and how it works where I failed to grasp it from reading tutorials only. I have detected, that it would be a nice thing to have in Python a function able to convert values from binary string to an integer representation as in my eyes both in case of long integer values are more or less the same thing/object. The only difference is probably in the header not in the representation of the actual value in memory - am I right here? Will it make sense to have a string-integer object which value can be used in both contexts as a binary string and a long integer value? Is there in Python any simple way to do the same as the following two following functions I have put together today: def longIntWithBitsOfBinaryString(stringToConvert): intWithBitsOfBinaryString = 0L for singleChar in stringToConvert: intWithBitsOfBinaryString = (intWithBitsOfBinaryString<<8) + ord(singleChar) #:for return intWithBitsOfBinaryString #:def longIntWithBitsOfBinaryString(s) def binaryStringWithBitsOfLongInt(i): listOfCharsOfStringWithThePackedInt = [] exponent = 1 while i > 256**exponent: exponent+=1 for byteNo in range(0,exponent): noOfBitsToShift = byteNo*8 listOfCharsOfStringWithThePackedInt.append(chr(i>>noOfBitsToShift&0xFF)) #:for # reverse (in place) in order to get the highest bits of the integer as leftmost byte listOfCharsOfStringWithThePackedInt.reverse() stringWithThePackedInt = ''.join(listOfCharsOfStringWithThePackedInt) return stringWithThePackedInt #:def binaryStringWithBitsOfLongInt(i) print "longIntWithBitsOfBinaryString('ABBA') = %i"%longIntWithBitsOfBinaryString('ABBA') print "binaryStringWithBitsOfLongInt(longIntWithBitsOfBinaryString('ABBA')) = '%s'"%binaryStringWithBitsOfLongInt(longIntWithBitsOfBinaryString('ABBA')) which gives: longIntWithBitsOfBinaryString('ABBA') = 1094861377 binaryStringWithBitsOfLongInt(longIntWithBitsOfBinaryString('ABBA')) = 'ABBA' ? And now my point I have promised to write about: If squeezing code makes it bad code and compressing literals is more or less compression technique and not Python programming, it is maybe a good idea to try to explore what Python distribution provides as data and modules and rewrite the seven_seg module, but with following limitations: 1. it is not allowed to use any literals in the provided code 2. it is not allowed to misuse the names of the identifiers as a kind of literals providing data 3. it is not allowed to use modules or files which doesn't come with the Python distribution. I have no slightest idea if it is possible to program a seven_seg module under such conditions. It could be a sign, that it would be a very interesting challenge worth to get involved into or a sign I have no slightest idea about Python and programming. What do you all think about it? Claudio

5 9

The New Extension IDE - EXTEIDE
by EXTEIDE (sent by Nabble.com) Jan. 1, 2006

Jan. 1, 2006

EXTEIDE is freeware. Anyone can download now. Please visit http://www.exteide.com Thanks. -- Sent from the Python - python-list forum at Nabble.com: http://www.nabble.com/The-New-Extension-IDE---EXTEIDE-t834523.html#a2164182

1 0

Tkinter app hanging on windows
by msoulier Jan. 1, 2006

Jan. 1, 2006

Hello, I have a very simple Tkinter application that I'm using to dispatch a mechanize crawl of a web form, when a button is clicked. Most of the time it will be idle, until the user decides to unminimize it and click that button. Unfortunately, I'm finding that after several hours of being up, when I go to the app, either by unminimizing it or simply bringing it into focus, the app is no longer dispatching events. It refuses to redraw itself, showing whatever was over it at the time. The app is apparently hung, and I do not believe that this is through any fault of my own, as the app is just too simple. Any ideas as to how I could find out why it is hanging? I'm using Python.org's win32 build of Python 2.4. I don't recall the exact version, but I can get it. Mike

1 0

loops breaks and returns
by rbt Jan. 1, 2006

Jan. 1, 2006

Is it more appropriate to do this: while 1: if x: return x Or this: while 1: if x: break return x Or, does it matter?

3 2

Re: MidiToText : EventDispatcher instance has no attribute 'sysex_events'
by Max M Jan. 1, 2006

Jan. 1, 2006

Carsten Haese wrote: > On Fri, 2005-12-30 at 09:52, tim wrote: > >>Trying to convert midi to text using MidiToText.py. >>I get the following: >> >>midi_port: 0 >>Traceback (most recent call last): >> File "MidiToText.py", line 176, in ? >> midiIn.read() >> File "C:\Python24\Lib\site-packages\midi\MidiInFile.py", line 24, in read >> p.parseMTrkChunks() >> File "C:\Python24\Lib\site-packages\midi\MidiFileParser.py", line 167, >>in parseMTrkChunks >> self.parseMTrkChunk() # this is where it's at! >> File "C:\Python24\Lib\site-packages\midi\MidiFileParser.py", line 129, >>in parseMTrkChunk >> dispatch.sysex_events(sysex_data) >>AttributeError: EventDispatcher instance has no attribute 'sysex_events' > > > Try changing "def sysex_event(self, data):" in > ...\midi\EventDispatcher.py to "def sysex_events(self, data):" Or just do a search and replace on the whole package:: search: sysex_events( replace: sysex_event( Apparently I have been inconsistent in my naming. New version at: http://www.mxm.dk/products/public/pythonmidi/download -- hilsen/regards Max M, Denmark http://www.mxm.dk/ IT's Mad Science

1 0

how-to POST form data to ASP pages?
by livin Jan. 1, 2006

Jan. 1, 2006

I need to post form data to an ASP page that looks like this on the page itself... <form method='POST'><input src=\icons\devices\coffee-on.gif type='image' align='absmiddle' width=16 height=16 title='Off'><input type='hidden' value='Image' name='Action'><input type='hidden' value='hs.ExecX10ByName "Kitchen Espresso Machine", "Off", 100'></form> I've been trying this but I get a syntax error... params = urllib.urlencode({'hidden': 'hs.ExecX10ByName "Kitchen Espresso Machine", "On", 100'}) urllib.urlopen("http://192.168.1.11:80/hact/kitchen.asp", params) Can someone help out and validate I'm on the right/wrong track and help with the syntax? thanks!

3 8

Preventing control characters from entering an XML file
by Frank Niessink Jan. 1, 2006

Jan. 1, 2006

Hi list, First of all, I wish you all a happy 2006. I have a small question that googling didn't turn up an answer for. So hopefully you'll be kind enough to send me in the right direction. I'm developing a desktop application, called Task Coach, that saves its domain objects (tasks, mostly :-) in an XML file. Users have reported that sometimes their Task Coach file would become unreadable by Task Coach after copying information from some other application into e.g. a task description. Looking at the 'corrupted' file showed that control characters ended up in the XML file (Control-K for example). Task Coach uses xml.dom to create an XML document and save it, like this: class XMLWriter: ... def write(self, taskList): domImplementation = xml.dom.getDOMImplementation() self.document = domImplementation.createDocument(None, 'tasks', None) ... for task in taskList.rootTasks(): self.document.documentElement.appendChild(self.taskNode(task)) self.document.writexml(self.__fd) # __fd is a file open for writing ... Apparently, the writexml method of xml.dom (which comes from xml.dom.minidom if pyxml is not installed I think) does not feel that writing control characters in an XML file is wrong, but the parser does: Traceback (most recent call last): ... File "c:\Program Files\Python24\lib\xml\dom\expatbuilder.py", line 207, in parseFile parser.Parse(buffer, 0) xml.parsers.expat.ExpatError: not well-formed (invalid token): line 77, column 147 Rightfully so, because ^K is not valid XML 1.0, according to http://www.w3.org/TR/REC-xml/: "Legal characters are tab, carriage return, line feed, and the legal characters of Unicode and ISO/IEC 10646. [...] Consequently, XML processors MUST accept any character in the range specified for Char. Character Range Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]" So, all this leads me to the following questions: - Why does the writexml method of the document created by the object returned by domImplementation() allow control characters? Isn't that a bug? - What is the easiest/most pythonic (preferably build-in) way of checking a unicode string for control characters and weeding those characters out? Thanks, Frank

1 0

Re: python coding contest
by jacob＠cd.chalmers.se Jan. 1, 2006

Jan. 1, 2006

In article <mailman.2656.1135808826.18701.python-list(a)python.org>, Simon Hengel <simon(a)airlangen.de> wrote: >Hello, > >> After all, I'd really love to set up another contest with >> different measures and criteria. > >for future events i will take a close look at other possibilities for >doing a ranking. At the moment the 22c3 and the contest is eating up all >my time. Pleas appreciate that i may not keep up with all mails. Sorry >for that. For whatever it is worth, I enjoyed myself thoroughly thinking about the problem, discussing it and listening to others discuss it. It was FUN! It is built into all requirements for shortest or fastest that the winning solution will be using obscure features and combinations in order to make the absolutely optimal solution. This doesn't really matter unless your goals are to demonstrate the elegance of the programming language. If you want to provide an alternative to solving crossword puzzles or mega-hard Sudoku's for the Christmas holiday, I'd say this is spot on. Jacob Hallén --

1 0

Filling out forms with python
by Steve Young Jan. 1, 2006

Jan. 1, 2006

Hi, I was wondering if there's a way to fill out forms online using python. Say for example if you wanted to make a search on some search engine without having to actually open a browser or something like that. Thanks. -Steve --------------------------------- Yahoo! DSL Something to write home about. Just $16.99/mo. or less

2 1

Re: Compressing folders in Windows using Python.
by Tim N. van der Leeuw Jan. 1, 2006

Jan. 1, 2006

Christian Tismer wrote: > sri2097 wrote: > > Hi, > > I'm trying to zip a particular fiolder and place the zipped folder into > > a target folder using python. I have used the following command in > > 'ubuntu'. > > > > zip_command = 'zip -qr %s %s' % (target, ' '.join(source)) > > > > I execute this using os.command(zip_command). It works fine... > > > > But when I run this script in Windows XP, I get an error while > > executing the above zip command. What command is there to zip files in > > Windows? Or is there any other problem ? > > zip is not a built-in command for windows. > You might use winzip or something else, there is > a bunch of different compression tools available. > > ciao - chris > Something else to watch for -- Spaces in filenames. Uncommon on unix/linux, but very common on windows. Put some double-quotes around the filenames in your zip_command: zip_command = 'zip -qr "%s" "%s"' % (target, ' '.join(source)) AFAIK there are built-in zip modules available in Python? They might be a better alternative to calling an external zip command? (Winzip btw, has a seperate download for a command-line capable version of the compressor) cheers, --Tim > -- > Christian Tismer :^) <mailto:tismer@stackless.com> > tismerysoft GmbH : Have a break! Take a ride on Python's > Johannes-Niemeyer-Weg 9A : *Starship* http://starship.python.net/ > 14109 Berlin : PGP key -> http://wwwkeys.pgp.net/ > work +49 30 802 86 56 mobile +49 173 24 18 776 fax +49 30 80 90 57 05 > PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 > whom do you want to sponsor today? http://www.stackless.com/

1 0