🌐 Mailman 3 June 2005 - Python-list - python.org

map vs. list-comprehension
by Mandus July 1, 2005

July 1, 2005

Hi there, inspired by a recent thread where the end of reduce/map/lambda in Python was discussed, I looked over some of my maps, and tried to convert them to list-comprehensions. This one I am not sure how to conver: Given three tuples of length n, b,i and d, I now do: map(lambda bb,ii,dd: bb+ii*dd,b,i,d) which gives a list of length n. Anyone have an idea what the equivalent list comprehension will be? take care, -- Mandus - the only mandus around.

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importing packages from a zip file
by Peter Tillotson July 1, 2005

July 1, 2005

Hi all, I was wondering if this is possible. In python v2.3 the import systems was extended via PEP302 to cope with packages. *.py files in a directory hierarchy can be imported as modules each level in the directory hierarchy needs to contain at least an empty __init__.py file. eg. With the file system base/ __init__.py branch1/ __init__.py myModule.py I can import myModule as follows import base.branch1.myModule At the same time its possible to store modules in a flat zip-file and import modules with the following. from myZip.zip import myModule.py but is there a way to do both at the same time? eg. from myZip.zip import base.branch1.myModule I'm interested in this in the development of mobile code for some Grid applications :-) thanks in advance p

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aligning text with space-normalized text
by Steven Bethard July 1, 2005

July 1, 2005

I have a string with a bunch of whitespace in it, and a series of chunks of that string whose indices I need to find. However, the chunks have been whitespace-normalized, so that multiple spaces and newlines have been converted to single spaces as if by ' '.join(chunk.split()). Some example data to clarify my problem: py> text = """\ ... aaa bb ccc ... dd eee. fff gggg ... hh i. ... jjj kk. ... """ py> chunks = ['aaa bb', 'ccc dd eee.', 'fff gggg hh i.', 'jjj', 'kk.'] Note that the original "text" has a variety of whitespace between words, but the corresponding "chunks" have only single space characters between "words". I'm looking for the indices of each chunk, so for this example, I'd like: py> result = [(3, 10), (11, 22), (24, 40), (44, 47), (48, 51)] Note that the indices correspond to the *original* text so that the substrings in the given spans include the irregular whitespace: py> for s, e in result: ... print repr(text[s:e]) ... 'aaa bb' 'ccc\ndd eee.' 'fff gggg\nhh i.' 'jjj' 'kk.' I'm trying to write code to produce the indices. Here's what I have: py> def get_indices(text, chunks): ... chunks = iter(chunks) ... chunk = None ... for text_index, c in enumerate(text): ... if c.isspace(): ... continue ... if chunk is None: ... chunk = chunks.next().replace(' ', '') ... chunk_start = text_index ... chunk_index = 0 ... if c != chunk[chunk_index]: ... raise Exception('unmatched: %r %r' % ... (c, chunk[chunk_index])) ... else: ... chunk_index += 1 ... if chunk_index == len(chunk): ... yield chunk_start, text_index + 1 ... chunk = None ... And it appears to work: py> list(get_indices(text, chunks)) [(3, 10), (11, 22), (24, 40), (44, 47), (48, 51)] py> list(get_indices(text, chunks)) == result True But it seems somewhat inelegant. Can anyone see an easier/cleaner/more Pythonic way[1] of writing this code? Thanks in advance, STeVe [1] Yes, I'm aware that these are subjective terms. I'm looking for subjectively "better" solutions. ;)

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Re: class attribute to instance attribute
by Devan L July 1, 2005

July 1, 2005

Why make it an instance attribute? Couldn't you just look at the class attribute? If its something that depends on each instance's value assigned to the attribute, why not make it an instance attribute to start with?

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Lost in a sea of documentation...can you point me in the right direction?
by MooMaster July 1, 2005

July 1, 2005

I'm a complete beginner in Python, but I've been fooling around with Java for a couple years, so I have decent programming experience... Anyway, I was sitting around playing with Python, when I thought to myself: "I know! I'd like to write a program that I can pass a path to (say: My Pictures) and at a timer interval will pick a picture from it and set my wallpaper to that" So I started reading about os, threads, and the path for the special folders in the archives and in the Python docs and I'm kind of lost because there aren't many concrete examples in the documentation. Can anyone point me in the right direction as to where I might find info that can help me write this? Thanks!

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Dr. Dobb's Python-URL! - weekly Python news and links (Jun 29)
by Simon Brunning July 1, 2005

July 1, 2005

QOTW: "And what defines a 'python activist' anyway? Blowing up Perl installations worldwide?" - Ivan Van Laningham "Floating point is about nothing if not being usefully wrong." - Robert Kern Sibylle Koczian needs to sort part of a list. His first attempt made the natural mistake - sorting a *copy* of part of the list: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/9… Kevin Dangoor compares ZODB and pysqlite with SQLObject: http://www.blueskyonmars.com/2005/06/18/zodb-vs-pysqlite-with-sqlobject/ Uwe Mayer needs a little convincing about "consenting adults" philosophy: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/d… Zope 2.8.0 is released: http://article.gmane.org/gmane.comp.web.zope.announce/987 Guido's ITC audio interview sparks off a discussion about the advantages of static typing in terms of tool support: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/d… Only c.l.py can go *this* far off topic without flames: http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1… Is there any good stuff left that Python should steal from other languages? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/d… Peter Gengtsson reminds himself and us how useful the \b regular expression special element is: http://www.peterbe.com/plog/slash_b Are there any 3rd party modules that you'd like to see included in the standard library? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/c… Is Python a good language for teaching children to program? http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/6… ======================================================================== Everything Python-related you want is probably one or two clicks away in these pages: Python.org's Python Language Website is the traditional center of Pythonia http://www.python.org Notice especially the master FAQ http://www.python.org/doc/FAQ.html PythonWare complements the digest you're reading with the marvelous daily python url http://www.pythonware.com/daily Mygale is a news-gathering webcrawler that specializes in (new) World-Wide Web articles related to Python. http://www.awaretek.com/nowak/mygale.html While cosmetically similar, Mygale and the Daily Python-URL are utterly different in their technologies and generally in their results. For far, FAR more Python reading than any one mind should absorb, much of it quite interesting, several pages index much of the universe of Pybloggers. http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog http://www.planetpython.org/ http://mechanicalcat.net/pyblagg.html comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce Steve Bethard, Tim Lesher, and Tony Meyer continue the marvelous tradition early borne by Andrew Kuchling, Michael Hudson and Brett Cannon of intelligently summarizing action on the python-dev mailing list once every other week. http://www.python.org/dev/summary/ The Python Package Index catalogues packages. http://www.python.org/pypi/ The somewhat older Vaults of Parnassus ambitiously collects references to all sorts of Python resources. http://www.vex.net/~x/parnassus/ Much of Python's real work takes place on Special-Interest Group mailing lists http://www.python.org/sigs/ The Python Business Forum "further[s] the interests of companies that base their business on ... Python." http://www.python-in-business.org Python Success Stories--from air-traffic control to on-line match-making--can inspire you or decision-makers to whom you're subject with a vision of what the language makes practical. http://www.pythonology.com/success The Python Software Foundation (PSF) has replaced the Python Consortium as an independent nexus of activity. It has official responsibility for Python's development and maintenance. http://www.python.org/psf/ Among the ways you can support PSF is with a donation. http://www.python.org/psf/donate.html Kurt B. Kaiser publishes a weekly report on faults and patches. http://www.google.com/groups?as_usubject=weekly%20python%20patch Cetus collects Python hyperlinks. http://www.cetus-links.org/oo_python.html Python FAQTS http://python.faqts.com/ The Cookbook is a collaborative effort to capture useful and interesting recipes. http://aspn.activestate.com/ASPN/Cookbook/Python Among several Python-oriented RSS/RDF feeds available are http://www.python.org/channews.rdf http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi http://python.de/backend.php For more, see http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all The old Python "To-Do List" now lives principally in a SourceForge reincarnation. http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse http://python.sourceforge.net/peps/pep-0042.html The online Python Journal is posted at pythonjournal.cognizor.com. editor(a)pythonjournal.com and editor(a)pythonjournal.cognizor.com welcome submission of material that helps people's understanding of Python use, and offer Web presentation of your work. del.icio.us presents an intriguing approach to reference commentary. It already aggregates quite a bit of Python intelligence. http://del.icio.us/tag/python *Py: the Journal of the Python Language* http://www.pyzine.com Archive probing tricks of the trade: http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100 http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.pyth… Previous - (U)se the (R)esource, (L)uke! - messages are listed here: http://www.ddj.com/topics/pythonurl/ (requires subscription) http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&s… http://purl.org/thecliff/python/url.html (dormant) or http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lan… Suggestions/corrections for next week's posting are always welcome. E-mail to <Python-URL(a)phaseit.net> should get through. To receive a new issue of this posting in e-mail each Monday morning (approximately), ask <claird(a)phaseit.net> to subscribe. Mention "Python-URL!". -- The Python-URL! Team-- Dr. Dobb's Journal (http://www.ddj.com) is pleased to participate in and sponsor the "Python-URL!" project.

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whois like functionality on Windows?
by Gerrit Muller July 1, 2005

July 1, 2005

I am migrating a website from a UNIX based machine to an Windows machine. In the logfiles I got from the old machine I mostly got domain names and sometimes only IP addresses. The Windows machine seems to produce only IP addresses. Somehow I cannot find a windows solution to translate an IP address back into a domain-name. Searching with Google shows that more people have been wrestling with this problem. I did find working whois scripts, but unfortunately: - the verbose whois registrar information often forbids automated access - the information is rather distributed, so you have to somehow access sufficient servers - you still have to find the domain name in the sea of details returned I also found socket based solutions, but these solutions crash with the message "host not found" :-( Anyone suggestions? kind regards, Gerrit -- Gaudi systems architecting: <http://www.extra.research.philips.com/natlab/sysarch/>

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Scket connection to server
by JudgeDread July 1, 2005

July 1, 2005

hello python gurus I would like to establish a socket connection to a server running a service on port 29999. the host address is 10.214.109.50. how do i do this using python? many thanks

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OOP help needed incorporating existing modules in class
by Koncept July 1, 2005

July 1, 2005

I want to incorporate the datetime and other modules into my class. I am new to Python and would really appreciate some help doing this. class FooBar: def getDate(self): return <datetime.datetime.ctime()> ^^^ how do I do something like this? -- Koncept << "The snake that cannot shed its skin perishes. So do the spirits who are prevented from changing their opinions; they cease to be a spirit." -Nietzsche

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Re: How to compare two directories?
by Michael Hoffman July 1, 2005

July 1, 2005

could ildg wrote: > I found dircmp compare only the direct dirs and files, > and it will not do anything to the sub-directories. The documentation for dircmp.report_full_closure() disagrees with you. -- Michael Hoffman

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