Difference between revisions of "Python threading"
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== Basic threading example == | == Basic threading example == | ||
| − | This runs my_function in a thread loop. | + | This gives a simple example of threading in Python. |
| + | This runs my_function() in a thread loop. | ||
Note that you might see "Done!" before the last line of thread output. | Note that you might see "Done!" before the last line of thread output. | ||
Welcome to threadland! | Welcome to threadland! | ||
Revision as of 13:35, 7 June 2007
Basic threading example
This gives a simple example of threading in Python. This runs my_function() in a thread loop. Note that you might see "Done!" before the last line of thread output. Welcome to threadland!
#!/usr/bin/env python
import time
import threading
class roller (threading.Thread):
def __init__(self, interval, function, args=[], kwargs={}):
threading.Thread.__init__(self)
self.interval = interval
self.function = function
self.args = args
self.kwargs = kwargs
self.finished = threading.Event()
def cancel(self):
self.finished.set()
def run(self):
while not self.finished.isSet():
self.finished.wait(self.interval)
self.function(*self.args, **self.kwargs)
def my_function (a, b, c):
print "meaningless arguments as an example:", a, b, c
print time.asctime()
print "Calling my_function() in a thread every 1/10th of second for two seconds."
r = roller (0.1, my_function, (1,0,-1))
r.start()
time.sleep(2)
r.cancel()
print "Done!"
Example output:
Calling my_function() in a thread every 1/10th of second for two seconds. meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:33 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:33 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:33 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:33 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:33 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:33 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:33 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:33 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:34 2007 meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:35 2007 Done! meaningless arguments as an example: 1 0 -1 Thu Jun 7 13:34:35 2007
