-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Ok. I have a PyQt program using mysql as a database with mysqldb as my database client. I'm spawning qt threads to do all the work before I call a postevent to let my application know I'm done. It turns out, however, that the thread locks in the middle of my run() call and never completes. I'm cross-posting this message as I'm not familiar with Python extension modules and I don't know if PyQt could have caused this, it is a Python bug (or feature) or if there is a problem in the mysqldb module code. Here's my run call: def run(self): """ called after the thread is spawned """ try: # never makes it through the quick_find_customer call.... self.data = quick_find.quick_find_customer(self.parameters) print "quick find returned:",self.data event = QCustomEvent(self.eventID) event.setData(self.data) QThread.postEvent(self.receiver,event) except Exception, msg: print msg I traced through everything and it seems to be blocking in the mysql code: def _execute(self, query, args): # makes it into the function but ... from types import ListType, TupleType from sys import exc_info # it never makes it this far.... try: if args is None: r = self._query(query) Once it locks, I get the following backtrace (using a full debug build of Python/PyQt/etc.): #0 0x4019fd49 in sigsuspend () from /lib/libc.so.6 #1 0x40033858 in __pthread_wait_for_restart_signal () from /lib/libpthread.so.0 #2 0x400300eb in pthread_cond_wait () from /lib/libpthread.so.0 #3 0x080b5c0e in PyThread_acquire_lock (lock=0x813d418, waitflag=1) at Python/thread_pthread.h:374 #4 0x080a5874 in lock_import () at Python/import.c:166 #5 0x080a81b2 in PyImport_ImportModuleEx (name=0x8182fc4 "types", globals=0x87f56a4, locals=0x8114484, fromlist=0x87f83f4) at Python/import.c:1657 #6 0x080f617b in builtin___import__ (self=0x0, args=0x813ab0c) at Python/bltinmodule.c:40 #7 0x080f3ec6 in PyCFunction_Call (func=0x81379f0, arg=0x813ab0c, kw=0x0) at Objects/methodobject.c:79 #8 0x080cdd9b in PyObject_Call (func=0x81379f0, arg=0x813ab0c, kw=0x0) at Objects/abstract.c:1688 #9 0x0808ea7b in PyEval_CallObjectWithKeywords (func=0x81379f0, arg=0x813ab0c, kw=0x0) at Python/ceval.c:3058 #10 0x0808a3f8 in eval_frame (f=0x852f99c) at Python/ceval.c:1843 <snip> #32 0x0808d204 in PyEval_EvalCodeEx (co=0x870c6b0, globals=0x871a6cc, locals=0x0, args=0x81e2d78, argcount=1, kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at Python/ceval.c:2595 #33 0x080e30df in function_call (func=0x870f34c, arg=0x81e2d64, kw=0x0) at Objects/funcobject.c:374 #34 0x080cdd9b in PyObject_Call (func=0x870f34c, arg=0x81e2d64, kw=0x0) at Objects/abstract.c:1688 #35 0x080d6f80 in instancemethod_call (func=0x870f34c, arg=0x81e2d64, kw=0x0) at Objects/classobject.c:2292 #36 0x080cdd9b in PyObject_Call (func=0x8582af4, arg=0x81e2d64, kw=0x0) at Objects/abstract.c:1688 #37 0x0808ea7b in PyEval_CallObjectWithKeywords (func=0x8582af4, arg=0x81e2d64, kw=0x0) at Python/ceval.c:3058 #38 0x40023ecb in sipEvalMethod (pm=0x8734788, args=0x81e2d64) at siplib.c:2898 #39 0x414a85a4 in sipQThread::sipVH_run(sipMethodCache const*, _sipThisType*) () from /usr/local/lib/python2.2/site-packages/libqtcmodule.so #40 0x414a8553 in sipQThread::run() () from /usr/local/lib/python2.2/site-packages/libqtcmodule.so #41 0x40517726 in QThreadPrivate::start(QThread*) (thread=0x8734778) at kernel/qthread_unix.cpp:79 - ---Type <return> to continue, or q <return> to quit--- #42 0x4051675b in start_thread (_arg=0x87327a0) at kernel/qthread_unix.cpp:98 #43 0x40031160 in pthread_start_thread () from /lib/libpthread.so.0 #44 0x40031262 in pthread_start_thread_event () from /lib/libpthread.so.0 So does anyone have any idea what's wrong or how to fix it? Please email me as well if you aren't posting to the PyQt/Python list (kibab at icehouse dot net). - --Kaleb -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux)
iD8DBQE+EyxOeAVt8Tl/2kURApe3AJ9Sf5oBy2/+iKN3L5eS5YWsSGwK8ACfQQv8 sUmiu7EUmYRCglp0NkHaM8E= =sxi1 -----END PGP SIGNATURE----- _______________________________________________ PyKDE mailing list [EMAIL PROTECTED] http://mats.gmd.de/mailman/listinfo/pykde
