Python 3 – Threads and daemons

In the post Python threading – an intro I introduced something about python threads, I explained the GIL (Global Interpreter Lock) and how to instantiate workers and timers. The GIL is the topic you must know to take full advantages from python threads. In this post I'm going to explain the following topics: Subclassing Thread Instantiating daemon thread Listing all instatiated threads Signaling threads – Subclassing Thread Since the module "threading" is implemented in an object oriented way, every thread corresponds to an object and you can easily subclass it. The simplest way to subclass is adding a parameter to the initialization and modify the run method to print the passed name:''' subclassing threads ''' import threading class SubThread(threading.Thread): ''' SubClass of Thread ''' def __init__(self, name): threading.Thread.__init__(self) self.name = name def run(self): print(self.name)in this way the subclassed thread will print the name passed as soon as the run method is called:if __name__ == '__main__': for i in range(5): t = SubThread('thread-'+str(i)) t.

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python,Tower of Babel,daemon,thread