🌐 Mailman 3 June 2002 - Python-list - python.org

problem recursively removing directories on an NFS mount
by Curtis Jensen July 30, 2002

July 30, 2002

I have a function to recursively remove directories: def removeDir( dirName ): """recursively remove a directory """ for name in os.listdir( dirName ): full_name = os.path.join(dirName, name) if os.path.isdir( full_name ): removeDir( full_name ) else: os.remove( full_name ) #end for name os.rmdir( dirName ) Using python1.5.2 on an IRIX 6.5 system, this function usually works fine. However, sometimes nfs files of the form ".nfs07D7761" get created. This causes the os.rmdir( full_name ) command to throw an exception because the directory is not empty. It appears that the os.remove() function causes NFS to generate these files. Is this a bug in os.remove or nfs or my function? What would be the best way to fix this problem? Thanks. -- Curtis Jensen cjensen(a)bioeng.ucsd.edu http://www-bioeng.ucsd.edu/~cjensen/ FAX (425) 740-1451

3 3

PYREX
by edlsoft＠mindspring.com July 13, 2002

July 13, 2002

Has anyone installed Pyrex on Windows? If so, can you share the details? Burt

4 3

Problems with mayavi, pyvtk
by d_blade8＠hotmail.com July 12, 2002

July 12, 2002

Hi everybody, I just downloaded and installed the latest versions of pyvtk and mayavi. However, when I try to follow the instructions at http://mayavi.sourceforge.net/docs/guide/c827.html#VIZ-DATA for using mayavi, I get the ImportError as below. For the like of me, I can't seem to figure out why I don't have any vtkpython modules anywhere (doing searches on the internet for the module hasn't been a big help so far, and it isn't ANYWHERE on my harddrive). Am I missing something simple (the fact that other people don't seem to be having this problem makes me think I am). Please let me know. Thanks a bunch. Lem >>> import mayavi Traceback (most recent call last): File "<interactive input>", line 1, in ? File "C:\Python22\Lib\site-packages\mayavi\__init__.py", line 5, in ? import Common, Base.Objects File "C:\Python22\Lib\site-packages\mayavi\Base\__init__.py", line 19, in ? import Objects File "C:\Python22\Lib\site-packages\mayavi\Base\Objects.py", line 20, in ? import Tkinter, vtkpython, math, tkColorChooser ImportError: No module named vtkpython >>>

4 5

COM server threads/unloading
by uncleenzo＠hushmail.com July 11, 2002

July 11, 2002

Hello, I have noticed that my multithreaded COM servers are not unloading when their clients have unloaded. To reproduce this in a simple case, I am using the py2exe COM server recipe. Running the server example with the client code below results in the testserver.exe loading after the dispatch call, and unloading after the server reference is set to None. Then I added the googlelogger import statement and the two lines initializing and calling the log method. The logger that has two threads. Using the same client code results in the testserver.exe loading after the dispatch call, but it does not unload after the server reference is set to None, nor does it unload after the client terminates. What is the proper way to get a multithreaded python COM server to unload when there are no external references to it? Thanks in advance, Enzo ps, comments about my logger design are welcome, but I'm mostly interested in the threading issues :) ----------------------------- Python 2.2.1 (#34, Apr 9 2002, 19:34:33) [MSC 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import win32com.client >>> server = win32com.client.Dispatch("Python.TestServer") >>> print server.Hello('enzo') Hello enzo >>> server = None >>> ^Z ---------------------------- file: testcomserver.py import googlelogger import sys import pythoncom if hasattr(sys, 'importers'): # we are running as py2exe-packed executable pythoncom.frozen = 1 class HelloWorld: _reg_clsctx_ = pythoncom.CLSCTX_LOCAL_SERVER if hasattr(sys, 'importers'): # In the py2exe-packed version, specify the module.class # to use. In the python script version, python is able # to figure it out itself. _reg_class_spec_ = "__main__.HelloWorld" _reg_clsid_ = "{592C15CE-894D-11D6-9A35-0050DA05A582}" _reg_desc_ = "Python Test COM Server" _reg_progid_ = "Python.TestServer" _public_methods_ = ['Hello'] _public_attrs_ = ['softspace', 'noCalls'] _readonly_attrs_ = ['noCalls'] def __init__(self): self.softspace = 1 self.noCalls = 0 self.mylogger = googlelogger.getLogger() # __init__() def Hello(self, who): self.noCalls = self.noCalls + 1 # insert "softspace" number of spaces self.mylogger.log('caller', str(who)) return "Hello" + " " * self.softspace + str(who) if __name__ == '__main__': if hasattr(sys, 'importers'): # running as packed executable. if '--register' in sys.argv[1:] or '--unregister' in sys.argv[1:]: # --register and --unregister work as usual import win32com.server.register win32com.server.register.UseCommandLine(HelloWorld) else: # start the server. from win32com.server import localserver localserver.main() else: import win32com.server.register win32com.server.register.UseCommandLine(HelloWorld) ---------------------- file: setup.py from distutils.core import setup import py2exe setup(name='testCOMserver', scripts=['testCOMserver.py']) ------------------------ file: googlelogger.py import threading import Queue import sys import pavlnchcfg import time import win32com.client # This thread waits for ("name", "value") items to appear in the queue. # It then checks for a log named "name", creates it if it doesn't exist, # and appends the message to that log, with a timestamp. class Writer(threading.Thread): def setLogger(self, logger): #print "setting self._logger to ", logger self._logger = logger def run(self): print "starting Writer.run thread" while 1 : # blocks until there are items in the queue event = self._logger._logeventqueue.get(1) #get returns a tuple, (name, message) if event[0] == 'QUIT': #magic quit event print "logger.Writer.run: got magic event: returning" return logname = event[0] message = event[1] try: filename = self._logger._dir + '\\' + logname + ".txt" logfile = open(filename, 'a') logfile.write(time.asctime() + " " + message + '\n') logfile.flush() logfile.close() print "logger.Writer.run: logged ", message, " to ", logname except: print "logger.Writer.run: with to log: ", logname, " failed with message: ", message class Logger: # class variables _logeventqueue = Queue.Queue() #one thread safe multiple user queue _dir = "" def __init__(self): try: Logger._dir="C:\\" # for our example print "logger.Logger.init: got log directory", Logger._dir, "from config" except: Logger._dir = "C:\\" print "logger.Logger.init: No log directory specified in config, _dir set to C:\\" writer = Writer() writer.setName("writerthread") writer.setLogger(self) writer.start() def log(self, logname, message): event = logname, message #making the event tuple # event tuple is tuple[0] = name, tuple[1] = event Logger._logeventqueue.put(event) # factory pattern as module instance _loggerInstance = None def getLogger(): import logger if logger._loggerInstance == None: logger._loggerInstance = Logger() return logger._loggerInstance else: return logger._loggerInstance if __name__ == '__main__': #test main import logger print "starting main" l = getLogger() print l l.log("DEBUG", "l, debug message 1") l.log("USAGE", "l, usagestat 1") l.log("DEBUG", "l, debug message 2") lg = getLogger() print lg lg.log("DEBUG", "lg, debug message 1") lg.log("USAGE", "lg, usagestat 1") lg.log("DEBUG", "lg, debug message 2") l.log("QUIT", "QUIT") print "done"

3 6

Python and Eclipse
by Joseph A Knapka July 9, 2002

July 9, 2002

Hi folks, I am interested in having Python support in Eclipse <URL: http://www.eclipse.org> - interested enough to contribute code, or to tackle the task myself, if need be. Of course, I'd like the Python support to be at least as good as the Java support, which is a pretty tall order, 'cause the Java support in Eclipse is awfully damn good --- it nearly allows me to *enjoy* writing Java code :-) Anyway, I know some other folks have expressed interest in this as well, and I'd like to hook up with them. If you're working on Python+Eclipse and you've got code in any state of completion, I'm willing to alpha- or beta-test, fix stuff, add new stuff, etc. Cheers, -- Joe "It was me, drove off the offramp / of the sweetheart highway..." -- Joe Strummer & The Mescaleros, "Bummed-Out City"

7 10

Re: converting an array of chars to a string
by Derek Thomson July 8, 2002

July 8, 2002

Gerhard Häring wrote: > > > Unless Python 1.5.2 compatibilty is a requirement, just use string > methods: > > lst = ['a', 'b', 'c', 'd'] > s = ''.join(lst) And they say you can't write obfuscated code in Python :) I would have expected "join" to be a method on the sequence, if anything. As in "s = lst.join('')". In fact, I looked for it, as I *knew* I'd seen it used before as a method, I just didn't expect it to be in the string class. I think I'll just stick with string.join for the time being. As it turns out, there's more than one way to do it, even in Python ;) < It's also not a good idea to replace the builtin list function, thus > I'm using 'lst' here. You're right, of course. Regards, Derek.

4 3

Re: procmail replacement in Python
by Radovan Garabik July 8, 2002

July 8, 2002

Gerhard H?ring <gerhard(a)bigfoot.de> wrote: : * Radovan Garabik <spam(a)melkor.dnp.fmph.uniba.sk> [2002-06-19 08:38 +0200]: :> Gerhard H�ring <gh_pythonlist(a)gmx.de> wrote: :> : Does such a thing exist? I've recently looked into the procmail sources :> :> <shameless advertising plug> :> http://melkor.dnp.fmph.uniba.sk/~garabik/pycmail.html :> </shameless advertising plug> : Whoa! _Exactly_ what I was searching. Would you mind registering it at : Freshmeat, so other people can find it more easily? http://freshmeat.net/projects/pycmail/ has been there for a long time:-) : Looks like a good project for my next weekend to convert my : fetchmail/procmail setup to getmail/pycmail. I would welcome especially suggestion about possible syntax changes. Since I cannot help myself, but the syntax (chosen functions and procedures dealing with mail) does feel a bit clumsy to me (even though I am the author :-)) -- ----------------------------------------------------------- | Radovan Garabik http://melkor.dnp.fmph.uniba.sk/~garabik | | __..--^^^--..__ garabik @ fmph . uniba . sk | ----------------------------------------------------------- Antivirus alert: file .signature infected by signature virus. Hi! I'm a signature virus! Copy me into your signature file to help me spread!

3 4

Re: [OT] What is Open Source? (was Re: ANN: Twisted 0.16.0...)
by huaiyu＠gauss.almadan.ibm.com July 5, 2002

July 5, 2002

Gerhard Häring <gh_pythonlist(a)gmx.de> wrote: >Quoting http://www.fsf.org/licenses/license-list.html > > """ > The License of Python 2.0.1, 2.1.1, and newer versions. This is a > free software license and is compatible with the GNU GPL. Please > note, however, that intermediate versions of Python (1.6b1, through > 2.0 and 2.1) are under a different license (see below). > [...] > """ Thank you for pointing this out. I thought it was classified by FSF as compatible with GPL. I did not know that it was actually classified as free software. I had the impression that the FSF only admits a software as free if its licence guarantees it to be free forever in all derived versions (copyleft). Reading that page again, the criteria appears to be just that the current version is free. Whether they have changed the definition in recent years, or whether I have misunderstood this issue from the beginning, I don't know. So now my mental picture is (copyleft) is subset of (free) is subset of (open source) It is also refreshing to see that (public domain) is subset of (free) Huaiyu

8 16

SSE With Swig
by Andrew Wilkinson July 4, 2002

July 4, 2002

Hi, I'm trying to develop a Vector class that uses Intel's SSE extension. It works very well when called using c or c++, but when I wrap the class with Swig I get a privileged instruction exception error (this is under Windows 2000 using MSVC++ 6sp5 with the processor pack installed). I've included the code below, any suggestions would be greatly appreciated Andrew Wilkinson swig.i %module Vector %{ #include "Vector.h" %} class Vector { public: Vector(); virtual ~Vector(); Vector* operator+(const Vector *other); float x; float y; float z; float w; }; __ vector.h class Vector { public: Vector(); virtual ~Vector(); Vector* operator+(const Vector *other); __declspec(align(16)) union { __m128 v; struct { float x; float y; float z; float w; }; }; }; --- vector.cpp #include "Vector.h" #include <xmmintrin.h> Vector::Vector() { x = 0.0f; y = 0.0f; z = 0.0f; w = 0.0f; } Vector::~Vector() { } Vector* Vector::operator +(const Vector *other) { Vector* r = new Vector; r->v = _mm_add_ps(v, (other->v)); // The exception occurs here. return r; } -- --- Ditch The Decimal System! Lets Use Hex - http://www.intuitor.com/hex/switch.html

3 3

Web templating/db tool with best designer/coder separation?
by bokr＠oz.net July 4, 2002

July 4, 2002

E.g., if you were hoping for an improvement over current practice, which do you consider to be the tool(s) to beat, and what would the killer improvement(s) be? TIA. Regards, Bengt Richter

14 24