nephish a écrit : > Hello there ! Hello,
> i am having a problem with threading. > OK, i have this GUI app that i am building with pygtk. > there is a process (four actually, just working on getting one right now) > that needs to run in the background. Please, do not mix "process" and "threads" ... there very different ... you're talking about threads here, so you want Threads to run in the background ... > there is a button that starts the background function. But, it locks up > the gui. it doesn't run in the background, it locks everything up. It > still runs though. That's just normal ... if you read PyGtk documentation, you'll see you need to initialise PyGtk to handle threads : http://www.async.com.br/faq/pygtk/index.py?req=index -> 20. The GTK Mainloop and Threading http://www.async.com.br/faq/pygtk/index.py?req=show&file=faq20.006.htp -> This is exactly your problem ! http://www.pygtk.org/pygtk2reference/gdk-functions.html#function-gdk--threads-init This is done like this : # First call to PyGtk function ever gtk.gdk.threads_init() # Here initialize what you want [...] # Launch the Gtk loop gtk.gdk.threads_enter() # Unneeded if you don't want to call GUI # functions from other threads gtk.main() gtk.gdk.threads_leave() # Needed only with threads_enter > one of the things this background process is to do is updata a viewable > area on the GUI. Now when run from a terminal, when i hit CTRL+C > it stops the thread, but doesnt kill the GUI, and the TextView gets > updated right then with everything it should have gotten before. > > > def Serial1(): > print 'running serial 1' > ser = serial.Serial('/dev/ttyS15', 2400, timeout=None) > loopy = 1 > i = 1 > while loopy < 5: > x_Now = strftime('%Y-%m-%d %H:%M:%S') > i = i + 1 > a = ser.read(1)#read one byte > a = ord(a) # change byte to integer > if (a < 64 )or (a > 127): > continue > b = ser.read(1) > b = ord(b) > if (b < 64 )or (b > 127): > continue > c = ser.read(1) > c = ord(c) > if c < 92: > continue > d = ser.read(1) > d = ord(d) > if d < 128: > continue > Sensor_ID = (a & 63) + (b & 63) * 64 + (c & 1) * 4096 > Status = (c & 62) / 2 + (d & 63) * 32 > c = int(c) > d = int(d) > x_Now = strftime('%Y-%m-%d %H:%M:%S') > f = open('/home/piv/PivData/tmp/Serial/'+str(i), 'w') > Input1Data = > str(Sensor_ID)+'\t'+str(Status)+'\t--------->\t'+x_Now+'\n' > Input1Iter = self.Input1Buffer.get_end_iter() > self.Input1Buffer.insert(Input1Iter, > Input1Data) > > f.write(str(Sensor_ID)+'\n'+str(c)+'\n'+str(d)+'\n'+str(Status)+'\n'+x_Now) > > > f.close() > thread.start_new(Serial1()) > > the code may not be best form, i am still fairly new at this. so i am > also open to > any constructive critisism. > > thanks > shawn > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > -- Pierre Barbier de Reuille INRA - UMR Cirad/Inra/Cnrs/Univ.MontpellierII AMAP Botanique et Bio-informatique de l'Architecture des Plantes TA40/PSII, Boulevard de la Lironde 34398 MONTPELLIER CEDEX 5, France tel : (33) 4 67 61 65 77 fax : (33) 4 67 61 56 68 _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
