很多场景为了不阻塞，都需要异步回调机制。这是一个简单的例子。
python的多线程异步常用到queue和threading模块
#!/usr/bin/env python# -*- coding: UTF-8 -*- import loggingimport queueimport threading def func_a(a, b): return a + b def func_b(): pass def func_c(a, b, c): return a, b, c # 异步任务队列_task_queue = queue.Queue() def async_call(function, callback, *args, **kwargs): _task_queue.put({ 'function': function, 'callback': callback, 'args': args, 'kwargs': kwargs }) def _task_queue_consumer(): """ 异步任务队列消费者 """ while True: try: task = _task_queue.get() function = task.get('function') callback = task.get('callback') args = task.get('args') kwargs = task.get('kwargs') try: if callback: callback(function(*args, **kwargs)) except Exception as ex: if callback: callback(ex) finally: _task_queue.task_done() except Exception as ex: logging.warning(ex) def handle_result(result): print(type(result), result) if __name__ == '__main__': t = threading.Thread(target=_task_queue_consumer) t.daemon = True t.start() async_call(func_a, handle_result, 1, 2) async_call(func_b, handle_result) async_call(func_c, handle_result, 1, 2, 3) async_call(func_c, handle_result, 1, 2, 3, 4) _task_queue.join()