python异步任务队列示例

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,大家参考使用吧

代码如下:

#!/usr/bin/env python# -*- coding: utf-8 -*-import loggingimport queueimport threadingdef func_a(a, b): return a + bdef func_b(): passdef 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()