#
            
            
              !/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()