Initialise and return the list of processes associated with this pool

def processes(self):
        """Initialise and return the list of processes associated with this pool"""
        if self._processes is None:
            self._processes = []
            for p in range(self.workers):
                t = Task(self._target, self._args, self._kwargs)
                t.name = "%s-%d" % (self.target_name, p)
                self._processes.append(t)

        return self._processes