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POsimple thread management within python classes
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copied!<p>Im trying to write a module for Python that prints out text for my program and displays a progress bar while i do something in the background. Im using the 'threading' module currently but open to suggestions if something else will make it easier.</p> <p>what i want to know is two fold, <strong><em>how should i call this class elegantly and how should i stop these threads im creating?</em></strong></p> <p>this is what im currently doing:</p> <pre><code>tmp1 = textprint("hello this is text") tmp1.start() # do something tmp1.stop() </code></pre> <p>these are the options ive considered and <a href="http://docs.python.org/library/threading.html" rel="nofollow">looked</a> into so far:</p> <ul> <li><p>using thread.name to find the name of the thread or having the thread return a name to kill afterwards. OR passing a number for similar thread identification afterwards. (a bit cumbersome and not my favourite solution.)</p> <p>sending a thread.event ? - from reading the docs i see an event can be sent, perhaps that can be used to stop it?</p> <p>or a <a href="http://www.python.org/dev/peps/pep-0343/" rel="nofollow">with</a> statement but im unclear how to use it in this context, plus i find most of the python docs extremely confusing and not written for me at all.</p></li> </ul> <p>what i would <em>like</em> to do is something like this:</p> <p><code>echo('hello')</code> (prints progress bar etc) - and then when i want to stop it <code>echo.stop()</code></p> <p>the obv. problem there though is that the stop function doesnt know which thread it is trying to stop.</p> <p>Here is a skeleton of what im trying to do:</p> <pre><code>import time import string import threading class print_text(threading.Thread): def __init__(self,arg=None): super(print_text,self).__init__() self._stop = False self.arg=arg def run (self): # start thread for text print self.txt while not self._stop: print "rude words" def echo (self,txt): self.txt=txt self.start() def stop(self): self._stop = True def stopped(self): return self._stop == True def __enter__(self): print "woo" return thing def __exit__(self, type, value, traceback): return isinstance(value, TypeError) if __name__ == '__main__': print_text.start.echo('this is text') # dunt werk with print_text.echo('this is text'): time.sleep(3) print "done" </code></pre> <p>and then call it like so:</p> <pre><code>echo('this is text') </code></pre> <p>i also guess to do this i would have to</p> <pre><code>import echo from print_text </code></pre> <p>the WITH way of doing things suggests putting an <code>__enter__</code> and <code>__exit__</code> bit in. i tried them and they didnt work and also, i didnt know what i was doing, really appreciate any help, thanks.</p>

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