Difference between revisions of "Python threading"

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(New page: Category:Engineering Category:Python == Basic threading example == <pre> import time import threading class roller (threading.Thread): def __init__(self, interval, function,...)
 
 
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[[Category:Engineering]]
 
[[Category:Engineering]]
 
[[Category:Python]]
 
[[Category:Python]]
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[[Category:Free_Software]]
 
== Basic threading example ==
 
== Basic threading example ==
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 +
This is a simple example of threading in Python.
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You pass it any function and your function is run in a thread loop.
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 +
Click to download: [http://www.noah.org/downloadsvn.php?src=file:///home/svn/src/python/thread_looper.py thread_looper.py]
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<include svncat src="file:///home/svn/src/python/thread_looper.py" highlight="python" />
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Example output:
  
 
<pre>
 
<pre>
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import time
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Calling my_function() in a thread every 1/10th of second for two seconds.
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import threading
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meaningless arguments as an example: 1 0 -1
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class roller (threading.Thread):  
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Thu Jun  7 13:34:33 2007
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    def __init__(self, interval, function, args=[], kwargs={}):  
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meaningless arguments as an example: 1 0 -1
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        threading.Thread.__init__(self)
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Thu Jun  7 13:34:33 2007
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        self.interval = interval
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meaningless arguments as an example: 1 0 -1
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        self.function = function
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Thu Jun  7 13:34:33 2007
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        self.args = args
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meaningless arguments as an example: 1 0 -1
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        self.kwargs = kwargs
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Thu Jun  7 13:34:33 2007
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        self.finished = threading.Event()
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meaningless arguments as an example: 1 0 -1
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    def cancel(self):  
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Thu Jun  7 13:34:33 2007
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        """Stop the roller."""
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meaningless arguments as an example: 1 0 -1
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        self.finished.set()
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Thu Jun  7 13:34:33 2007
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    def run(self):  
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meaningless arguments as an example: 1 0 -1
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        while not self.finished.isSet():  
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Thu Jun  7 13:34:33 2007
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            self.finished.wait(self.interval)
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meaningless arguments as an example: 1 0 -1
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            self.function(*self.args, **self.kwargs)
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Thu Jun  7 13:34:33 2007
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meaningless arguments as an example: 1 0 -1
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r = roller (0.01, p.rotate_palette, (1,0,-1))
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Thu Jun  7 13:34:34 2007
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r.start()
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meaningless arguments as an example: 1 0 -1
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time.sleep(60)
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Thu Jun  7 13:34:34 2007
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r.cancel()
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meaningless arguments as an example: 1 0 -1
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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
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Thu Jun  7 13:34:34 2007
 +
meaningless arguments as an example: 1 0 -1
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Thu Jun  7 13:34:35 2007
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Done!
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meaningless arguments as an example: 1 0 -1
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Thu Jun  7 13:34:35 2007
 
</pre>
 
</pre>

Latest revision as of 19:00, 3 January 2008

Basic threading example

This is a simple example of threading in Python. You pass it any function and your function is run in a thread loop.

Click to download: thread_looper.py <include svncat src="file:///home/svn/src/python/thread_looper.py" highlight="python" />

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
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