Simple threading

hg hg at nospam.com
Thu Nov 23 16:30:53 CET 2006


jrpfinch wrote:
> I'm just getting started on threading and was wondering why the
> following code does not work (i know globals is bad style - I'll
> eliminate them eventually).  All I get is a blank cursor flashing.
> 
> Many thanks
> 
> Jon
> 
> import threading
> import sys
> import time
> global g_datum
> global g_rawfile
> global g_rawtext
> global g_overs
> global g_currentover
> global g_secondspertick
> 
> 
> g_secondspertick=5
> g_datum=time.time()
> g_currenttick=1
> g_rawfile=open('inputashes.txt','r')
> g_rawtext=g_rawfile.read()
> g_overs=g_rawtext.split('<P>')
> g_currentover=0
> 
> 
> class ImapThread(threading.Thread):
>     def run(self):
>         global g_currenttick
>         if time.time() > (g_datum + (g_secondspertick *
> g_currenttick)):
>             print "Ticked %s" % g_currenttick
>             g_currenttick=g_currenttick+1
>             print g_currenttick
>             sys.stdout.flush()
>     time.sleep(0.01)
> 
> def main():
>     ImapThread().start()
>     while 1:
>         pass
> 
> if __name__ == "__main__":
>     main()
> 
Run gets called only once: you need to put your logic in a "while True"
or something equivalent/define some escape clause.

Right now you just get into the implicit "else" and get out.

hg

import time
global g_datum
global g_rawfile
global g_rawtext
global g_overs
global g_currentover
global g_secondspertick


g_secondspertick=5
g_datum=time.time()
g_currenttick=1
#g_rawfile=open('inputashes.txt','r')
#g_rawtext=g_rawfile.read()
#g_overs=g_rawtext.split('<P>')
g_currentover=0


class ImapThread(threading.Thread):
    def run(self):
        while True:
            global g_currenttick
            if time.time() > (g_datum + (g_secondspertick *
g_currenttick)):
                print "Ticked %s" % g_currenttick
                g_currenttick=g_currenttick+1
                print g_currenttick
                sys.stdout.flush()
            else:
                print 'HERE'
        time.sleep(0.01)

def main():
    ImapThread().start()
    while 1:
        pass

if __name__ == "__main__":
    main()




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