🌐 Mailman 3 October 2008 - Python-list - python.org

Python 2.5.3: call for patches
by "Martin v. Löwis" Nov. 12, 2008

Nov. 12, 2008

Within a few weeks, we will release Python 2.5.3. This will be the last bug fix release of Python 2.5, afterwards, future releases of 2.5 will only include security fixes, and no binaries (for Windows or OSX) will be provided anymore (from python.org). In principle, the release will include all changes that are already on the release25-maint branch in subversion [1]. If you think that specific changes should be considered, please create an issue in the bug tracker [2], and label it with the 2.5.3 version. Backports of changes that are already released in Python 2.6 but may apply to 2.5 are of particular interest. Regards, Martin [1] http://svn.python.org/projects/python/branches/release25-maint/ [2] http://bugs.python.org/

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[matplotlib] Overlapping axis text
by Durand Nov. 10, 2008

Nov. 10, 2008

I got a really annoying problem with datetime graphs. The problem is that with a long range time graph, the text on the x axis keeps overlapping like here: http://durand.zephyrhosting.net/tremcs/graph_all.png Would there be any way to fix this? I was thinking of rotating the text so that there was enough space for each one but the best solution would be to only display text with the right scale. IE, with a 7 day graph, each day would have text, with a year long graph, each month would be displayed, etc... This is the code I use at the moment but its pretty messy: import dateutil,pylab from matplotlib.dates import MonthLocator, WeekdayLocator fig = pylab.figure() ax = fig.add_subplot(111) days = MonthLocator() # every monday months = MonthLocator() # every month ax.xaxis.set_major_locator(months) ax.xaxis.set_minor_locator(days) pylab.plot_date(pylab.date2num(dates), allkills, '.-', color='blue') pylab.plot_date(pylab.date2num(dates), alldeaths, '.-', color='red') pylab.plot_date(pylab.date2num(dates), kills, '.-', color='darkgreen') pylab.plot_date(pylab.date2num(dates), deaths, '.-', color='orange') if legend == 1: pylab.legend(("Total Kills","Total Deaths", "Single Session Kills", "Single Session Deaths"), 'lower left') pylab.xlabel('Date') pylab.ylabel('Stats') ax2 = pylab.twinx() pylab.plot_date(pylab.date2num(dates), allratio, '.-', color='purple') pylab.plot_date(pylab.date2num(dates), ratio, '.-', color='yellow') pylab.ylabel('Ratio') ax2.yaxis.tick_right() pylab.show() Please excuse the extra tabbing, it's part of an if statement.

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Re: 2.6, 3.0, and truly independent intepreters
by Andy O'Meara Nov. 10, 2008

Nov. 10, 2008

> > The Global Interpreter Lock is fundamentally designed to make the > interpreter easier to maintain and safer: Developers do not need to > worry about other code stepping on their namespace. This makes things > thread-safe, inasmuch as having multiple PThreads within the same > interpreter space modifying global state and variable at once is, > well, bad. A c-level module, on the other hand, can sidestep/release > the GIL at will, and go on it's merry way and process away. ...Unless part of the C module execution involves the need do CPU- bound work on another thread through a different python interpreter, right? (even if the interpreter is 100% independent, yikes). For example, have a python C module designed to programmatically generate images (and video frames) in RAM for immediate and subsequent use in animation. Meanwhile, we'd like to have a pthread with its own interpreter with an instance of this module and have it dequeue jobs as they come in (in fact, there'd be one of these threads for each excess core present on the machine). As far as I can tell, it seems CPython's current state can't CPU bound parallelization in the same address space (basically, it seems that we're talking about the "embarrassingly parallel" scenario raised in that paper). Why does it have to be in same address space? Convenience and simplicity--the same reasons that most APIs let you hang yourself if the app does dumb things with threads. Also, when the data sets that you need to send to and from each process is large, using the same address space makes more and more sense. > So, just to clarify - Andy, do you want one interpreter, $N threads > (e.g. PThreads) or the ability to fork multiple "heavyweight" > processes? Sorry if I haven't been clear, but we're talking the app starting a pthread, making a fresh/clean/independent interpreter, and then being responsible for its safety at the highest level (with the payoff of each of these threads executing without hinderance). No different than if you used most APIs out there where step 1 is always to make and init a context object and the final step is always to destroy/take- down that context object. I'm a lousy writer sometimes, but I feel bad if you took the time to describe threads vs processes. The only reason I raised IPC with my "messaging isn't very attractive" comment was to respond to Glenn Linderman's points regarding tradeoffs of shared memory vs no. Andy

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Re: a question about Chinese characters in a Python Program
by est Nov. 9, 2008

Nov. 9, 2008

On Oct 20, 10:48 am, Liang Chen <c...(a)uga.edu> wrote: > Hope you all had a nice weekend. > > I have a question that I hope someone can help me out. I want to run a Python program that uses Tkinter for the user interface (GUI). The program allows me to type Chinese characters, but neverthelss is unable to show them up on screen. The follow is some of the error message I received after I logged off the program: > > "Could not write output: <type "exceptions: UnicodeEncodeError'>, 'ascii' codec can't encode characters in position 0-1: ordinal not in range (128)" > > Any suggestion will be appreciated. > > Sincerely, > > Liang > > Liang Chen,Ph.D. > Assistant Professor > University of Georgia > Communication Sciences and Special Education > 542 Aderhold Hall > Athens, GA 30602 > > Phone: 706-542-4566 Personally I call it a serious bug in python, but sadly most of python community members do not agree . It may be a internal str() that caused this issue. https://groups.google.com/group/comp.lang.python/t/ca6ade6b6f5f3052 http://bugs.python.org/issue3648

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SendKeys-0.3.win32-py2.1.exe
by Jesse Nov. 8, 2008

Nov. 8, 2008

cant seem to install this, using python 2.6, any known errors that wont let me select the python installation to use, just opens a blank dialog and wont let me continue..do i need to downgrade python?? thanks in advance

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Python 2.6, GUI not working on vista?
by process Nov. 6, 2008

Nov. 6, 2008

i just downloaded 2.6 and when running the gui nothing happens. anyone else with the same problem?

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Sending multi-part MIME package via HTTP-POST
by squishywaffle＠gmail.com Nov. 5, 2008

Nov. 5, 2008

This has got me somewhat stumped, so I'll throw it up here in hopes that someone has ran into this before. I'm trying to send a MIME package to Esko Backstage. I'm a bit confused as to how to send this to the server in a manner that it'll be able to get and de-code the MIME package in a valid way. The big question is does this entire mime package belong in the headers section of an HTTP request? If not, what is the best Pythonic way to send this thing. I'm using 2.5's email package to create the package and was trying to use its as_string() method to pump this through httplib, but I'm getting a very vague server error message that seems to indicate a malformed package. Here is the broken code: hcon = httplib.HTTPConnection(JMF_GATEWAY) hcon.putrequest('POST', JMF_GATEWAY_PATH) hcon.endheaders() hcon.send(msg.as_string()) I've pasted the string representation of the MIME package I'm trying to send below. Any ideas would be greatly appreciated. Content-Type: multipart/related; boundary="===============1845688244==" MIME-Version: 1.0 start: cid:beginning --===============1845688244== Content-Type: application/vnd.cip4-jmf+xml MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-ID: beginning <?xml version="1.0" ?><JMF SenderID="QMon" Version="1.2"><Command ID="Link1290_5" Type="SubmitQueueEntry"><QueueSubmissionParams Hold="false" Priority="50" URL="cid:aJDF_1"/></Command></JMF> --===============1845688244== Content-Type: application/vnd.cip4-jdf+xml MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-ID: aJDF_1 <?xml version="1.0" ?> <JDF DescriptiveName="StepRepeatTab and RIP" ID="n0001" Status="Waiting" Type="ProcessGroup" Version="1.2" xmlns="http:// www.CIP4.org/JDFSchema_1_1" xmlns:eg="http://www.esko-graphics.com/ EGschema1_0"> <ResourcePool> <RunList Class="Parameter" DescriptiveName="1-up" ID="SourceFileList" PartIDKeys="Run" Status="Available"> <RunList Run="Run0001"> <LayoutElement> <FileSpec URL="/archive/49297 PEPPINOS/49297-1 DMT-20.pdf"/> </LayoutElement> </RunList> </RunList> </ResourcePool> <JDF DescriptiveName="RIP1up" ID="n0003" Status="Waiting" Type="eg:BackStageTask" Version="1.2" xmlns="http://www.CIP4.org/ JDFSchema_1_1" xmlns:eg="http://www.esko-graphics.com/EGschema1_0"> <NodeInfo JobPriority="50"/> <ResourcePool> <eg:BackStageTaskParams Class="Parameter" ID="TaskParamLink" Status="Available" eg:Hold="false" eg:TicketName="/ fripfile_s.file_sModel1.grx/XXXPROOFTICKETXXX"/> </ResourcePool> <ResourceLinkPool> <eg:BackStageTaskParamsLink Usage="Input" rRef="TaskParamLink"/> <RunListLink Usage="Input" rRef="SourceFileList"/> <RunListLink Usage="Output" rRef="TIFFList"/> </ResourceLinkPool> </JDF> </JDF> --===============1845688244==--

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split() and string.whitespace
by Chaim Krause Nov. 4, 2008

Nov. 4, 2008

I am unable to figure out why the first two statements work as I expect them to and the next two do not. Namely, the first two spit the sentence into its component words, while the latter two return the whole sentence entact. import string from string import whitespace mytext = "The quick brown fox jumped over the lazy dog.\n" print mytext.split() print mytext.split(' ') print mytext.split(whitespace) print string.split(mytext, sep=whitespace)

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separate shared libraries or different Linux/Unix
by stuntgoat Nov. 4, 2008

Nov. 4, 2008

Hi, I want to start using Python 2.6 and 3000. I have several questions. What, in your experiences, is a functionally elegant solution to installing 2.6 and 3 from source without breaking package dependencies on your favorite Linux/Unix flavor? Is compiling Python 2.6 and 3.0 on a *nix development machine and having it work seamlessly as simple as choosing a particular flavor or are there always going to be package juggling/mangling/pinning/managing issues affecting the other programs on the operating system? Is it as simple as choosing a flavor that is likely to have a Python 3 package available? Or: Is there a way to make a copy of shared libraries ( under perhaps /usr/ local/py2.6lib/ and /usr/local/py3lib/ ) so that I can use 2.6 and 3 without causing package problems with other programs within my operating system? If this seems like a good solution, where can I find more information about how to implement separate libraries inside the same OS as appropriate for Python? This might be the better solution than simply choosing a development flavor of *nix because I am going to want to install other Python libraries like numpy and matplotlib from source that might depend on other potentially incompatible shared libraries than either versions of Python or my Linux/Unix distro ( I have a feeling I am going to learn how to use ldconfig ). I have a bit of experience with Debian Etch but I recently garbled my package management database while compiling the latest version of zlib for Python 2.6. ( why was I compiling and installing zlib from source? I was learning another lesson in patience and planning )

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Re: split() and string.whitespace
by Chaim Krause Nov. 4, 2008

Nov. 4, 2008

I have arrived here while attempting to break down a larger problem. I got to this question when attempting to split a line on any whitespace character so that I could then add several other characters like ';' and ':'. Ultimately splitting a line on any char in a union of string.whitespace and some pre-designated chars. I am now beginning to think that I have outgrown split() and must move up to regular expressions. If that is the case, I will go off and RTFM on RegEx.

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