🌐 Mailman 3 December 2009 - Python-list - python.org

Importing bitly.py in twitter-gedit.py
by Vikash Dhankar Dec. 31, 2009

Dec. 31, 2009

Hi, I am newbie in the python, I am stuck into a small problem. Me and my friend are working on the gedit based Twitter plugin. http://code.google.com/p/gedit-twitter-plugin/ Now I want to add the tiny URL thing into this. I am using the bitly API for this. Its is already available in the python bitly.py http://code.google.com/p/python-bitly/ now i want to use this bitly.py into the main file ( importing the bitly.py to the twitter_gedit.py) . One thing more, bitly.py uses the django.utils so you can download that from http://www.djangoproject.com/download/ Thanks. its open

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Python LinkedIn API
by ozgur vatansever Dec. 31, 2009

Dec. 31, 2009

Hi, I've just coded an extremely simple LinkedIn API. If you are interested, you can check it out. http://code.google.com/p/python-linkedin/ Happy coding.

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Length of an Unsized Object
by Victor Subervi Dec. 31, 2009

Dec. 31, 2009

Hi; I have this code: sql = 'describe %s %s;' % (optionsStore, option) print sql cursor.execute(sql) descr = cursor.fetchone() if len(descr) is not None: Python complains: *TypeError*: len() of unsized object Please advise how to rewrite the last line so as to avoid the infamous try/except. TIA, beno -- The Logos has come to bear http://logos.13gems.com/

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Instantiate an object based on a variable name
by Wells Dec. 31, 2009

Dec. 31, 2009

Sorry, this is totally basic, but my Google-fu is failing: I have a variable foo. I want to instantiate a class based on its value- how can I do this?

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Re: Bare Excepts
by samwyse Dec. 31, 2009

Dec. 31, 2009

On Dec 30, 7:23 am, Jean-Michel Pichavant <jeanmic...(a)sequans.com> wrote: > Rule N°2: > dont use BARE EXCEPT, or you'll piss off MRAB for good :o). Beside from > kidding, don't use bare except. I inherited some code that used bare excepts *everywhere*. There were about 4K lines of code, IIRC, and I think that they were more except clauses than elses. Eventually, I used sed to add a print_exc() after each one, just so I could figure out what the expected exceptions were. It was so bad that I seriously considered writing a program just to parse all the tracebacks from my instrumented version and then revise the source code for me, but I didn't want to accidentally miss any "real" errors.

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Re: Dynamic text color
by Lie Ryan Dec. 31, 2009

Dec. 31, 2009

On 1/1/2010 2:24 AM, Dave McCormick wrote: > If I count characters from the beginning how do I know what line the > text is on? > Would you mind making your last hint a bit stronger... From http://infohost.nmt.edu/tcc/help/pubs/tkinter/text-index.html: """ + n chars From the given index, move forward n characters. This operation will *cross line boundaries.* """

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Re: Dynamic text color
by John Posner Dec. 31, 2009

Dec. 31, 2009

On Wed, 30 Dec 2009 12:58:06 -0500, Dave McCormick <mackrackit(a)gmail.com> wrote: > Hi All, > > I am new to Python and the list so I hope I am posting this correctly... > > I am working on a way to have text automatically formated in a Tkiniter > Text widget and would like some input on my code. > Currently I am using Python 2.5 because the server I use has that > installed. Tkinter is tk8.4. > > Most of the time when I type red, blue, or green the code works as > expected. When I copy paste text into the widget the last line is > parsed with part of the previous lines > So I guess the problem is in the "looping"? > > Here is my code: > from Tkinter import * > root = Tk() > def get_position(event): > start = 1.0 A couple of problems here: you define "start", but then never use it. Worse, it looks like you don't understand that a line-column index into a Tkinter Text widget is a STRING, not a FLOAT. > while 1: pos = Tbox.search("red",END,backwards=TRUE) I suggest that you use Tbox.get() instead of Tbox.search(), and then use Python's more powerful text-search tools. More on this below. > if not pos: > break > red = pos + "-1c" > Tbox.tag_add("red", pos, float(pos)+.03) > Tbox.tag_config("red", foreground="red") You don't want to define the "red" tag every time get_position() is executed -- that is, every time the user presses a key. Define the red/green/blue tags just once, right after you create the Text widget. > pos = Tbox.search("blue",END,backwards=TRUE) > if not pos: > break > blue = pos + "-1c" > Tbox.tag_add("blue", pos, float(pos)+.04) > Tbox.tag_config("blue", foreground="blue") > > pos = Tbox.search("green",END,backwards=TRUE) > if not pos: > break > green = pos + "-1c" > Tbox.tag_add("green", pos, float(pos)+.05) > Tbox.tag_config("green", foreground="green") The previous 6 lines are almost identical to the 6 lines that precede them. This is fine for prototyping, but when you find yourself writing code like this, think about using a loop or a parameterized function call. For example, you might write this function: def insert_color_markup(color): ... ... and then call it as many times as you need to: insert_color_markup("red") insert_color_markup("green") insert_color_markup("blue") Now, about those text-search tools: the "re" (regular expression) module include the function "finditer". This is a real power tool, combining regular expressions and Python iterators -- both of which can be intimidating to newcomers. But it's just what you want, IMHO. I hope the following annotated IDLE transcript convinces you: Python 2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit (Intel)] on win32 >>> import re >>> text = """The red ball is red, not green. On other other ... hand, the green ball has both red and blue highlights. ... Thank you. ... """ >>> re.finditer("red", text) <callable-iterator object at 0x00CC46D0> ... not too exciting, but this is better: >>> list(re.finditer("red", text)) [<_sre.SRE_Match object at 0x00C01F70>, <_sre.SRE_Match object at 0x00C06E20>, <_sre. SRE_Match object at 0x00C06E58>] ... this list indicates that we got three hits on the word "red" >>> [ matchobj.span() for matchobj in re.finditer("red", text) ] [(4, 7), (16, 19), (77, 80)] ... paydirt: a list of (start,end) pairs for an invocation of Text.tag_add() One more hint: forget about the line-column indexes into the contexts of a Text widget. Just count characters from the beginning, e.g.: "1.0 + %d chars" % start_position > break > > Tbox = Text(root,width=40, height=15, wrap=CHAR) > Tbox.grid(column=0, row=0, sticky=(N+W+E+S)) > root.grid_columnconfigure(0, weight=1) > root.grid_rowconfigure(0, weight=1) > Tbox.bind("<KeyRelease>", get_position) > Tbox.focus() > root.mainloop() > > Thank you, > Dave I hope this set of hints is helpful, and not too disjointed, terse, or cryptic. I think this is a cute little app! -John

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Python-URL! - weekly Python news and links (Dec 31)
by Gabriel Genellina Dec. 31, 2009

Dec. 31, 2009

QOTW: "With Lisp or Forth, a master programmer has unlimited power and expressiveness. With Python, even a regular guy can reach for the stars." - Raymond Hettinger web2py vs. Django comparison: http://groups.google.com/group/comp.lang.python/t/b014b89ede34dc27/ The risks of indiscriminately catching all exceptions with a bare except clause: http://groups.google.com/group/comp.lang.python/t/8d7e542eb3b14682/ How to detect if Python is running in interactive mode: http://groups.google.com/group/comp.lang.python/t/93ca6e78bbc7840e/ Subtracting two datetime objects yields a timedelta - but its meaning isn't obvious for everyone: http://groups.google.com/group/comp.lang.python/t/f2bdf717828c27e4/ Splitting an iterable into fixed-length pieces: http://groups.google.com/group/comp.lang.python/t/acbf0bad283fa289/ How to redistribute the runtime libraries required to run Python on Windows: http://groups.google.com/group/comp.lang.python/t/54e419bf4cf17375/ Some tips on getting help from inside IDLE http://groups.google.com/group/comp.lang.python/t/3bc8625b4ffe641/ How to get at a class globals: http://groups.google.com/group/comp.lang.python/t/9ad6b6a8fbb57bcc/ The oldest thread still alive -- started almost three months ago. Now discussing whether good programmers may survive bad languages, or good languages encourage good programming, or viceversa, or the other way out, or ...: http://groups.google.com/group/comp.lang.python/t/d22fd69527205232/ This group is (like) a teddy bear! http://groups.google.com/group/comp.lang.python/t/bab283b640452c19/ ======================================================================== 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 Just beginning with Python? This page is a great place to start: http://wiki.python.org/moin/BeginnersGuide/Programmers The Python Papers aims to publish "the efforts of Python enthusiasts": http://pythonpapers.org/ The Python Magazine is a technical monthly devoted to Python: http://pythonmagazine.com Readers have recommended the "Planet" site: http://planet.python.org comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/group/comp.lang.python.announce/topics Python411 indexes "podcasts ... to help people learn Python ..." Updates appear more-than-weekly: http://www.awaretek.com/python/index.html The Python Package Index catalogues packages. http://www.python.org/pypi/ Much of Python's real work takes place on Special-Interest Group mailing lists http://www.python.org/sigs/ 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/donations/ The Summary of Python Tracker Issues is an automatically generated report summarizing new bugs, closed ones, and patch submissions. http://search.gmane.org/?author=status%40bugs.python.org&group=gmane.comp.p… Although unmaintained since 2002, the Cetus collection of Python hyperlinks retains a few gems. 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://code.activestate.com/recipes/langs/python/ Many Python conferences around the world are in preparation. Watch this space for links to them. Among several Python-oriented RSS/RDF feeds available, see: http://www.python.org/channews.rdf 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://www.python.org/dev/peps/pep-0042/ 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 Enjoy the *Python Magazine*. http://pymag.phparch.com/ *Py: the Journal of the Python Language* http://www.pyzine.com Dr.Dobb's Portal is another source of Python news and articles: http://www.ddj.com/TechSearch/searchResults.jhtml?queryText=python and Python articles regularly appear at IBM DeveloperWorks: http://www.ibm.com/developerworks/search/searchResults.jsp?searchSite=dW&se… Previous - (U)se the (R)esource, (L)uke! - messages are listed here: http://search.gmane.org/?query=python+URL+weekly+news+links&group=gmane.com… http://groups.google.com/groups/search?q=Python-URL!+group%3Acomp.lang.pyth… http://lwn.net/Search/DoSearch?words=python-url&ctype3=yes&cat_25=yes There is *not* an RSS for "Python-URL!"--at least not yet. Arguments for and against are occasionally entertained. 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!". Write to the same address to unsubscribe. -- The Python-URL! Team-- Phaseit, Inc. (http://phaseit.net) is pleased to participate in and sponsor the "Python-URL!" project. Watch this space for upcoming news about posting archives.

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multithreading, performance, again...
by mk Dec. 31, 2009

Dec. 31, 2009

Hello everyone, I have figured out (sort of) how to do profiling of multithreaded programs with cProfile, it goes something like this: #!/usr/local/bin/python import cProfile import threading class TestProf(threading.Thread): def __init__(self, ip): threading.Thread.__init__(self) self.ip = ip def run(self): prof = cProfile.Profile() retval = prof.runcall(self.runmethod) prof.dump_stats('tprof' + self.ip) def runmethod(self): pass tp = TestProf('10.0.10.10') tp.start() tp.join() The problem is, now that I've done profiling in the actual program (profiled version here: http://python.domeny.com/cssh_profiled.py) with 9 threads and added up stats (using pstats.Stats.add()), the times I get are trivial: >>> p.strip_dirs().sort_stats('cumulative').print_stats(10) Wed Dec 30 16:23:59 2009 csshprof9.156.44.113 Wed Dec 30 16:23:59 2009 csshprof9.156.46.243 Wed Dec 30 16:23:59 2009 csshprof9.156.46.89 Wed Dec 30 16:24:00 2009 csshprof9.156.47.125 Wed Dec 30 16:24:00 2009 csshprof9.156.47.17 Wed Dec 30 16:24:00 2009 csshprof9.156.47.29 Wed Dec 30 16:24:01 2009 csshprof9.167.41.241 Wed Dec 30 16:24:02 2009 csshprof9.168.119.15 Wed Dec 30 16:24:02 2009 csshprof9.168.119.218 39123 function calls (38988 primitive calls) in 6.004 CPU seconds Ordered by: cumulative time List reduced from 224 to 10 due to restriction <10> ncalls tottime percall cumtime percall filename:lineno(function) 9 0.000 0.000 6.004 0.667 cssh.py:696(runmethod) 100 0.004 0.000 5.467 0.055 threading.py:389(wait) 82 0.025 0.000 5.460 0.067 threading.py:228(wait) 400 5.400 0.013 5.400 0.013 {time.sleep} 9 0.000 0.000 5.263 0.585 cssh.py:452(ssh_connect) 9 0.003 0.000 5.262 0.585 client.py:226(connect) 9 0.001 0.000 2.804 0.312 transport.py:394(start_client) 9 0.005 0.001 2.254 0.250 client.py:391(_auth) 18 0.001 0.000 2.115 0.117 transport.py:1169(auth_publickey) 18 0.001 0.000 2.030 0.113 auth_handler.py:156(wait_for_response) <pstats.Stats instance at 0xb7ebde8c> It's not burning CPU time in the main thread (profiling with cProfile indicated smth similar to the above), it's not burning it in the individual worker threads - so where the heck it is burning this CPU time? bc 'top' shows heavy CPU load during most of the time of the program run. help... regards, mk

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Create attribute from string
by AON LAZIO Dec. 31, 2009

Dec. 31, 2009

Hi, I would like to know how we could create attribute from string say I want to assign value 0.05 to an object attribute I like to input "SIGNIFICANT" and 0.05 and get object.SIGFICANT equals to 0.05 Thanks -- Passion is my style

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