Python threading.Thread() Examples

def __init__(self, eventHandler):
        threading.Thread.__init__(self)
        self.name = 'Server'
        self.daemon = True
        self._eventHandler = eventHandler

        self._client = None
        self._server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self._server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

        try:
            self._server.bind(('', PORT))
            self._server.listen(5)
        except socket.error:
            event = Event(Events.SCAN_ERROR, msg='Could not start server')
            post_event(eventHandler, event)
            return

        self._cancel = False
        self.start() 

def pipe_fopen(command, mode, background=True):
    if mode not in ["rb", "r"]:
        raise RuntimeError("Now only support input from pipe")

    p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE)

    def background_command_waiter(command, p):
        p.wait()
        if p.returncode != 0:
            warnings.warn("Command \"{0}\" exited with status {1}".format(
                command, p.returncode))
            _thread.interrupt_main()

    if background:
        thread = threading.Thread(target=background_command_waiter,
                                  args=(command, p))
        # exits abnormally if main thread is terminated .
        thread.daemon = True
        thread.start()
    else:
        background_command_waiter(command, p)
    return p.stdout 

def auto(self, start_message, end_message):
        """
        Auto progress.
        """
        self._auto_running = threading.Event()
        self._auto_thread = threading.Thread(target=self._spin)

        self.start(start_message)
        self._auto_thread.start()

        try:
            yield self
        except (Exception, KeyboardInterrupt):
            self._io.write_line("")

            self._auto_running.set()
            self._auto_thread.join()

            raise

        self.finish(end_message, reset_indicator=True) 

def download_all_section(*arg):
    if len(arg)==1:
        k=arg[0]
        th=[]
        for key in decode.keys():
            th.append(threading.Thread(target=download, args=(key,k)))
        for t in th:
            t.start()
        for t in th:
            t.join()      
    elif len(arg)==2:
        From=arg[0]
        To=arg[1]
        th=[]
        for key in decode.keys():
            th.append(threading.Thread(target=download, args=(key, From, To)))
        for t in th:
            t.start()
        for t in th:
            t.join() 

def main():
  print("Starting number crunching")
  t0 = time.time()
  
  threads = []

  for i in range(10):
    thread = threading.Thread(target=executeProc)
    threads.append(thread)
    thread.start()

  for thread in threads:
    thread.join()

  t1 = time.time()
  totalTime = t1 - t0
  print("Execution Time: {}".format(totalTime)) 

def parallel_download_all_section(*arg):
    if len(arg)==1:
        k=arg[0]
        pro=[]
        for key in decode.keys():
            pro.append(multiprocessing.Process(target=download, args=(key, k)))
            #th.append(threading.Thread(target=download, args=(key,k)))
        for p in pro:
            p.start()
        for p in pro:
            p.join()
    elif len(arg)==2:
        From=arg[0]
        To=arg[1]
        pro=[]
        for key in decode.keys():
            pro.append(multiprocessing.Process(target=download, args=(key, From, To)))
            #th.append(threading.Thread(target=download, args=(key,k)))
        for p in pro:
            p.start()
        for p in pro:
            p.join() 

def test_task_complete(self, deckhand_ingester, input_files, setup,
                           blank_state, mock_get_build_data):
        input_file = input_files.join("deckhand_fullsite.yaml")
        design_ref = "file://%s" % str(input_file)

        orchestrator = orch.Orchestrator(
            state_manager=blank_state, ingester=deckhand_ingester)
        orch_task = orchestrator.create_task(
            action=hd_fields.OrchestratorAction.Noop, design_ref=design_ref)
        orch_task.set_status(hd_fields.TaskStatus.Queued)
        orch_task.save()

        orch_thread = threading.Thread(target=orchestrator.watch_for_tasks)
        orch_thread.start()

        try:
            time.sleep(10)

            orch_task = blank_state.get_task(orch_task.get_id())

            assert orch_task.get_status() == hd_fields.TaskStatus.Complete
        finally:
            orchestrator.stop_orchestrator()
            orch_thread.join(10) 

def get_task_status(id):
    """Query the status of an asynchronous task."""
    # obtain the task and validate it
    global background_tasks
    rv = background_tasks.get(id)
    if rv is None:
        return not_found(None)

    # if the task object is a Thread object that means that the task is still
    # running. In this case return the 202 status message again.
    if isinstance(rv, Thread):
        return jsonify({}), 202, {'Location': url_for('get_task_status', id=id)}

    # If the task object is not a Thread then it is assumed to be the response
    # of the finished task, so that is the response that is returned.
    # If the application is configured to auto-delete task status resources once
    # the task is done then the deletion happens now, if not the client is
    # expected to send a delete request.
    if app.config['AUTO_DELETE_BG_TASKS']:
        del background_tasks[id]
    return rv 

def get_task_status(id):
    """Query the status of an asynchronous task."""
    # obtain the task and validate it
    global background_tasks
    rv = background_tasks.get(id)
    if rv is None:
        return not_found(None)

    # if the task object is a Thread object that means that the task is still
    # running. In this case return the 202 status message again.
    if isinstance(rv, Thread):
        return jsonify({}), 202, {'Location': url_for('get_task_status', id=id)}

    # If the task object is not a Thread then it is assumed to be the response
    # of the finished task, so that is the response that is returned.
    # If the application is configured to auto-delete task status resources once
    # the task is done then the deletion happens now, if not the client is
    # expected to send a delete request.
    if app.config['AUTO_DELETE_BG_TASKS']:
        del background_tasks[id]
    return rv 

def __init__(self, eventHandler, freq, gain, cal):
        threading.Thread.__init__(self)
        self.name = 'Receive'
        self.daemon = True

        self._cancel = False
        self._freq = freq
        self._gain = gain
        self._cal = cal
        self._eventHandler = eventHandler
        self._sdr = None
        self._capture = (ctypes.c_ubyte * SAMPLES)()

        devices = rtlsdr.librtlsdr.rtlsdr_get_device_count()
        if devices == 0:
            event = Event(Events.SCAN_ERROR, msg='No device found')
            post_event(eventHandler, event)
        else:
            self.start() 

def start_with_callback(self, func, args=None, kwargs=None):
        """Start 'func' in a new thread T, then start self (and return T)."""
        if args is None:
            args = ()
        if kwargs is None:
            kwargs = {}
        args = (func,) + args

        def _callback(func, *a, **kw):
            self.wait(states.STARTED)
            func(*a, **kw)
        t = threading.Thread(target=_callback, args=args, kwargs=kwargs)
        t.setName('Bus Callback ' + t.getName())
        t.start()

        self.start()

        return t 

def start(self):
        """Start the HTTP server."""
        if self.running:
            self.bus.log('Already serving on %s' % self.description)
            return

        self.interrupt = None
        if not self.httpserver:
            raise ValueError('No HTTP server has been created.')

        if not os.environ.get('LISTEN_PID', None):
            # Start the httpserver in a new thread.
            if isinstance(self.bind_addr, tuple):
                portend.free(*self.bind_addr, timeout=Timeouts.free)

        import threading
        t = threading.Thread(target=self._start_http_thread)
        t.setName('HTTPServer ' + t.getName())
        t.start()

        self.wait()
        self.running = True
        self.bus.log('Serving on %s' % self.description) 

def test_wait(bus):
    """Test that bus wait awaits for states."""
    def f(method):  # pylint: disable=invalid-name
        time.sleep(0.2)
        getattr(bus, method)()

    flow = [
        ('start', [bus.states.STARTED]),
        ('stop', [bus.states.STOPPED]),
        ('start', [bus.states.STARTING, bus.states.STARTED]),
        ('exit', [bus.states.EXITING]),
    ]

    for method, states in flow:
        threading.Thread(target=f, args=(method,)).start()
        bus.wait(states)

        # The wait method MUST wait for the given state(s).
        assert bus.state in states, 'State %r not in %r' % (bus.state, states) 

def test_8_Ram_Cleanup(self):
        def lock():
            s1 = sessions.RamSession()
            s1.acquire_lock()
            time.sleep(1)
            s1.release_lock()

        t = threading.Thread(target=lock)
        t.start()
        start = time.time()
        while not sessions.RamSession.locks and time.time() - start < 5:
            time.sleep(0.01)
        assert len(sessions.RamSession.locks) == 1, 'Lock not acquired'
        s2 = sessions.RamSession()
        s2.clean_up()
        msg = 'Clean up should not remove active lock'
        assert len(sessions.RamSession.locks) == 1, msg
        t.join() 

def run(self):
        """
        Thread run method. Consumes integers from list
        """
        while True:
            self.condition.acquire()
            print 'condition acquired by %s' % self.name
            while True:
                if self.integers:
                    integer = self.integers.pop()
                    print '%d popped from list by %s' % (integer, self.name)
                    break
                print 'condition wait by %s' % self.name
                self.condition.wait()
            print 'condition released by %s' % self.name
            self.condition.release() 

def start(self):
        logger.info("Starting the BGP PctrlListener")

        while self.run:
            conn = self.listener.accept()

            pc = PctrlClient(conn, self.listener.last_accepted)
            t = Thread(target=pc.start)

            with clientPoolLock:
                logger.debug('Trace: PctrlListener.start: clientActivePool before: %s', clientActivePool)
                logger.debug('Trace: PctrlListener.start: clientDeadPool before: %s', clientDeadPool)
                clientActivePool[pc] = t

                # while here, join dead threads.
                while clientDeadPool:
                    clientDeadPool.pop().join()
                logger.debug('Trace: PctrlListener.start: clientActivePool after: %s', clientActivePool)
                logger.debug('Trace: PctrlListener.start: clientDeadPool after: %s', clientDeadPool)

            t.start() 

def start_eh_arp(self):
        self.logger.info("ARP Event Handler started.")

        while self.run:
            # need to poll since recv() will not detect close from this end
            # and need some way to shutdown gracefully.
            if not self.arp_client.poll(1):
                continue
            try:
                tmp = self.arp_client.recv()
            except EOFError:
                break

            data = json.loads(tmp)
            self.logger.debug("ARP Event received: %s", data)

            # Starting a thread for independently processing each incoming network event
            event_processor_thread = Thread(target=self.process_event, args=(data,))
            event_processor_thread.daemon = True
            event_processor_thread.start()

        self.arp_client.close()
        self.logger.debug("Exiting start_eh_arp") 

def main(argv):
    logging.basicConfig(level=logging.INFO)

    log_history = LogHistory(argv.config, argv.flow_dir, argv.port_dir, int(argv.num_steps), debug=True)

    channel = "sdx_stats"
    address = "192.168.99.100"
    port = 6379
    db = 0

    publisher = Publisher(channel, address, port)

    log_replay = LogReplay(log_history, publisher, int(argv.timestep), debug=True)

    # start replay
    replay_thread = Thread(target=log_replay.start)
    replay_thread.daemon = True
    replay_thread.start()

    while replay_thread.is_alive():
        try:
            replay_thread.join(1)
        except KeyboardInterrupt:
            log_replay.stop() 

def info(log:str,target='console'):
    """
    log: text to record.
    target: 'console' to print log on screen or file to write in. 
    """
    if target=='console':
        thd=threading.Thread(target=print,args=(ctime(),':',log))
        thd.setDaemon(True)
        thd.start()
        thd.join()
    else:
        try:
            thd=threading.Thread(target=print,args=(ctime(),':',log))
            thd.setDaemon(True)
            thd.start()
            thd.join()
        except Exception as e:
            print(e) 

def clear():
    s = threading.Thread(None,unicornhathd.clear)
    s.start()
    return "ok" 

def show():
    s = threading.Thread(None,unicornhathd.show)
    s.start()
    return "ok" 

def __init__(self, load_batch_func, nb_workers=1, queue_size=50, threaded=True):
        self.queue = multiprocessing.Queue(queue_size)
        self.workers = []
        for i in range(nb_workers):
            if threaded:
                worker = threading.Thread(target=self._load_batches, args=(load_batch_func, self.queue))
            else:
                worker = multiprocessing.Process(target=self._load_batches, args=(load_batch_func, self.queue))
            worker.daemon = True
            worker.start()
            self.workers.append(worker) 

def __init__(self, augseq, queue_source, nb_workers, queue_size=50, threaded=False):
        assert 0 < queue_size <= 10000
        self.augseq = augseq
        self.queue_source = queue_source
        self.queue_result = multiprocessing.Queue(queue_size)
        self.workers = []
        for i in range(nb_workers):
            augseq.reseed()
            if threaded:
                worker = threading.Thread(target=self._augment_images_worker, args=(self.augseq, self.queue_source, self.queue_result))
            else:
                worker = multiprocessing.Process(target=self._augment_images_worker, args=(self.augseq, self.queue_source, self.queue_result))
            worker.daemon = True
            worker.start()
            self.workers.append(worker) 

def test_task_termination(self, input_files, deckhand_ingester, setup,
                              blank_state):
        input_file = input_files.join("deckhand_fullsite.yaml")
        design_ref = "file://%s" % str(input_file)

        orchestrator = orch.Orchestrator(
            state_manager=blank_state, ingester=deckhand_ingester)
        orch_task = orchestrator.create_task(
            action=hd_fields.OrchestratorAction.Noop, design_ref=design_ref)

        orch_task.set_status(hd_fields.TaskStatus.Queued)
        orch_task.save()

        orch_thread = threading.Thread(target=orchestrator.watch_for_tasks)
        orch_thread.start()

        try:
            time.sleep(2)
            orchestrator.terminate_task(orch_task)

            time.sleep(10)
            orch_task = blank_state.get_task(orch_task.get_id())
            assert orch_task.get_status() == hd_fields.TaskStatus.Terminated
        finally:
            orchestrator.stop_orchestrator()
            orch_thread.join(10) 

def background(f):
    """Decorator that runs the wrapped function as a background task. It is
    assumed that this function creates a new resource, and takes a long time
    to do so. The response has status code 202 Accepted and includes a Location
    header with the URL of a task resource. Sending a GET request to the task
    will continue to return 202 for as long as the task is running. When the task
    has finished, a status code 303 See Other will be returned, along with a
    Location header that points to the newly created resource. The client then
    needs to send a DELETE request to the task resource to remove it from the
    system."""
    @functools.wraps(f)
    def wrapped(*args, **kwargs):
        # The background task needs to be decorated with Flask's
        # copy_current_request_context to have access to context globals.
        @copy_current_request_context
        def task():
            global background_tasks
            try:
                # invoke the wrapped function and record the returned
                # response in the background_tasks dictionary
                background_tasks[id] = make_response(f(*args, **kwargs))
            except:
                # the wrapped function raised an exception, return a 500
                # response
                background_tasks[id] = make_response(internal_server_error())

        # store the background task under a randomly generated identifier
        # and start it
        global background_tasks
        id = uuid.uuid4().hex
        background_tasks[id] = Thread(target=task)
        background_tasks[id].start()

        # return a 202 Accepted response with the location of the task status
        # resource
        return jsonify({}), 202, {'Location': url_for('get_task_status', id=id)}
    return wrapped

# g is the context request object from Flask 

def background(f):
    """Decorator that runs the wrapped function as a background task. It is
    assumed that this function creates a new resource, and takes a long time
    to do so. The response has status code 202 Accepted and includes a Location
    header with the URL of a task resource. Sending a GET request to the task
    will continue to return 202 for as long as the task is running. When the task
    has finished, a status code 303 See Other will be returned, along with a
    Location header that points to the newly created resource. The client then
    needs to send a DELETE request to the task resource to remove it from the
    system."""
    @functools.wraps(f)
    def wrapped(*args, **kwargs):
        # The background task needs to be decorated with Flask's
        # copy_current_request_context to have access to context globals.
        @copy_current_request_context
        def task():
            global background_tasks
            try:
                # invoke the wrapped function and record the returned
                # response in the background_tasks dictionary
                background_tasks[id] = make_response(f(*args, **kwargs))
            except:
                # the wrapped function raised an exception, return a 500
                # response
                background_tasks[id] = make_response(internal_server_error())

        # store the background task under a randomly generated identifier
        # and start it
        global background_tasks
        id = uuid.uuid4().hex
        background_tasks[id] = Thread(target=task)
        background_tasks[id].start()

        # return a 202 Accepted response with the location of the task status
        # resource
        return jsonify({}), 202, {'Location': url_for('get_task_status', id=id)}
    return wrapped 

def send(self, uri, data):
        thread = threading.Thread(target=self.__send, args=(uri, data,))
        thread.daemon = True
        thread.start() 

def __init__(self, eventHandler, gpsDevice):
        threading.Thread.__init__(self)
        self.name = 'GPS'

        self._gpsDevice = gpsDevice
        self._eventHandler = eventHandler

        self._comm = None
        self._timeout = None
        self._cancel = False

        self._sats = {}

        self.start() 

def __init__(self, callback):
        threading.Thread.__init__(self)
        self.name = 'GPS Timeout'

        self._callback = callback
        self._done = threading.Event()
        self._reset = True

        self.start() 

def __get__(self, inst, owner):
        if inst is None:
            return self
        key = self._func.__get__(inst, type(inst))
        if key not in self._queues:
            self._queues[key] = queue.Queue()
            self._threads[key] = threading.Thread(target=self._thread_loop, args=[inst, key])
            self._threads[key].daemon = True
            self._threads[key].start()
        return lambda *a, **k: self._queues[key].put((a, k))