🌐 Mailman 3 April 2007 - Python-list - python.org

Re: [Python-Dev] Python 3000 PEP: Postfix type declarations
by Johann C. Rocholl April 1, 2007

April 1, 2007

Brilliant! On 4/1/07, Georg Brandl <g.brandl(a)gmx.net> wrote: > def foo${LATIN SMALL LETTER LAMBDA WITH STROKE}$(x${DOUBLE-STRUCK CAPITAL C}$): > return None${ZERO WIDTH NO-BREAK SPACE}$ > > This is still easy to read and makes the full power of type-annotated Python > available to ASCII believers. +1 J

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tag replacement in toxml()
by Manuel Ospina April 1, 2007

April 1, 2007

Hi all, I am new on the list and I already have a question :-(. I have something like this: import xml.dom.minidom from xml.dom.minidom import getDOMImplementation impl = getDOMImplementation() myDoc = impl.createDocument(None, "example", None) myRoot = myDoc.documentElement myNode1 = myDoc.createElement("node") myNode2 = myDoc.createElement("nodeTwo") myText = myDoc.createTextNode("Here is the <b>problem</>") myNode2.appendChild(myText) myNode1.appendChild(myNode2) myRoot.appendChild(myNode1) print myDoc.toxml() The result is: '<?xml version="1.0" ?>\n<example><node><nodeTwo>Here is the <b>problem</></nodeTwo></node></example>' My question is how I can avoid that toxml() replaces the tags? Regards, Manuel ______________________________________________ LLama Gratis a cualquier PC del Mundo. Llamadas a fijos y móviles desde 1 céntimo por minuto. http://es.voice.yahoo.com

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shelf membership
by Aaron Brady April 1, 2007

April 1, 2007

can you shelve objects with membership? this gives you: TypeError: object does not support item assignment dict 0 True Exception exceptions.TypeError: 'object does not support item assignment' in ignored > ignored is a bit mysterious. tx in advance. from shelve import * class MyShelf(DbfilenameShelf): def __init__(self, filename, flag='c', protocol=None, writeback=False, binary=None): self.__dict__['ready']=False DbfilenameShelf.__init__(self, filename, flag, protocol, writeback, binary) self.ready=True def __setattr__(self,name,value): if not self.ready: self.__dict__[name]=value else: print name, value, self.ready self.__dict__[name]=value DbfilenameShelf.__setitem__(self,name,value) def open(filename, flag='c', protocol=None, writeback=False, binary=None): return MyShelf(filename, flag, protocol, writeback, binary)

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Re: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
by John Nagle April 1, 2007

April 1, 2007

Mark Dufour wrote: > Hi all, > > I have recently released version 0.0.20 and 0.0.21 of Shed Skin, an > optimizing Python-to-C++ compiler. Shed Skin allows for translation of > pure (unmodified), implicitly statically typed Python programs into > optimized C++, and hence, highly optimized machine language. Besides > many bug fixes and optimizations, these releases add the following > changes: > > I'm also > hoping someone else would like to deal with integration with CPython > (so Shed Skin can generate extension modules, and it becomes easier to > use 'arbitrary' external CPython modules such as 're' and 'pygame'.) Reusing precompiled external modules will be tough. Even CPython has trouble with that. But that's just a conversion problem. Maybe SWIG (yuck, but it exists) could be persuaded to cooperate. For regular expressions, here's an implementation, in C++, of Python-like regular expressions. http://linuxgazette.net/issue27/mueller.html That might be a way to get a regular expression capability into Shed Skin quickly. > Finally, there may be some interesting Master's thesis subjects in > improving Shed Skin, such as transforming heap allocation into stack- > and static preallocation, where possible, to bring performance even > closer to manual C++. Please let me know if you are interested in > helping out, and/or join the Shed Skin mailing list. Find out where the time is going before spending it on that. A good test: BeautifulSoup. Many people use it for parsing web pages, and it's seriously compute-bound. John Nagle

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Re: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
by Michael Torrie April 1, 2007

April 1, 2007

On Sun, 2007-04-01 at 02:49 +0000, Dennis Lee Bieber wrote: > Take that up with ACT... GNAT 3.15p was explicitly unencumbered, but > the current version of GNAT, in the GPL (no-service contract) form has > gone the other direction, claiming that executables must be released > GPL. The no-service contract version of the GPL is not the same as the standard GPLv2. Ordinarily the GPLv2 does not apply to the output of the program unless the license specifies that it does (a modification or addendum). Thus the output of a program is not part of the GPL usually, unless specified MySQL's take on the GPLv2 without an addendum is mistaken, in my opinion. However, copyright law probably still applies to the programs output regardless of license, but in what way I don't think the courts have ever specified, given that the output depends largely on the input. GCC, Bison, and Flex, all explicitly state that the output of the program is not under any license, and is your own property. Perhaps the author of Shed Skin could make a note in the license file to clarify the state of the output of his program. There should be no problem with this Shed Skin program being under the GPL and using it with python scripts that are not under the GPL. But if you have any concern with a copyright license at all, you should consult your lawyer. Too many companies see GPL'd programs as a free ride, not willing to accept that they need a copyright license to use the code just as they would with any code from any source. It's sad to see because free software gets an unfair bad rap because of the greed of others. On the other hand, others take an overly paranoid view of the GPL and pretend it is viral and somehow magically infects your code with the GPL license, which is false--if you use GPL'd code in your non GPL'd application then you are in a copyright violation situation and your only options are to either GPL your code or remove the offending GPL'd source from your code and write your own dang code, thank you very much.

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Port Function crc_ccitt_update from C++
by Py Thorneiro April 1, 2007

April 1, 2007

Hi folks, Please, I don´t understand exactly what this function CRC CCITT UPDATE in C++ AVR can be ported to Python.. uint16_t crc_ccitt_update (uint16_t crc, uint8_t data) { data ˆ= lo8 (crc); data ˆ= data << 4; return ((((uint16_t)data << 8) | hi8 (crc)) ˆ (uint8_t)(data >> 4) ˆ ((uint16_t)data << 3)); } Source: http://tldp.tuxhilfe.de/linuxfocus/common/src2/article352/avr-libc-user-man… In parts reason this lo8 and hi8, is there some good soul here that can help-me with this conversion? I try seach in Google and Koders some code that use it, but I don´t had sucess... Big Hugs Thanks Regards. -Py -Thorneiro

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help with dates
by rustybear＠gmail.com April 1, 2007

April 1, 2007

[sorry about the earlier post. accidently hit enter] I'm working on a website for some firefighters that want to be able to sign-up for overtime and I need some help figuring out a date related problem. Here's the scenario: Four groups of firefighters (group1, group2, group3, group4). Each group works a 24 hr shift. So group1 works April 1, group2 works April 2, group3 works April 3, group4 works April 4, group 1 works April 5, etc. It just keeps rolling like this forever into next year, etc. I need to come up with a methodology for the following: If given a date, find out what group is working on that date. Has anyone dealt with a problem like this before? Obviously I'll need to have a starting date where group1 is associated with a starting date. Fortunately there are no surprises. Groups work in order (1,2,3,4,1,2,3,4,1,2,...) and dates go in order and there are absolutely no special exceptions for holidays and anything else. Thanks in advance for any clues. Kevin

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