Python多線程異步任務隊列

#!/usr/bin/env python
# -*- coding: UTF-8 -*-
 
import logging
import queue
import threading
 
def func_a(a, b):
 return a + b
 
def func_b():
 pass
 
def func_c(a, b, c):
 return a, b, c
 
# 異步任務隊列
_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():
 """
 異步任務隊列消費者
 """
 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()