<p>我以前也遇到过这个问题:<a href="https://stackoverflow.com/questions/40536287/running-multiple-asynchronous-function-and-get-the-returned-value-of-each-functi"><em>Running multiple asynchronous function and get the returned value of each function</em></a>。这就是我的方法:</p>
<pre><code>def async_call(func_list):
"""
Runs the list of function asynchronously.
:param func_list: Expects list of lists to be of format
[[func1, args1, kwargs1], [func2, args2, kwargs2], ...]
:return: List of output of the functions
[output1, output2, ...]
"""
def worker(function, f_args, f_kwargs, queue, index):
"""
Runs the function and appends the output to list, and the Exception in the case of error
"""
response = {
'index': index, # For tracking the index of each function in actual list.
# Since, this function is called asynchronously, order in
# queue may differ
'data': None,
'error': None
}
# Handle error in the function call
try:
response['data'] = function(*f_args, **f_kwargs)
except Exception as e:
response['error'] = e # send back the exception along with the queue
queue.put(response)
queue = Queue()
processes = [Process(target=worker, args=(func, args, kwargs, queue, i)) \
for i, (func, args, kwargs) in enumerate(func_list)]
for process in processes:
process.start()
response_list = []
for process in processes:
# Wait for process to finish
process.join()
# Get back the response from the queue
response = queue.get()
if response['error']:
raise response['error'] # Raise exception if the function call failed
response_list.append(response)
return [content['data'] for content in sorted(response_list, key=lambda x: x['index'])]
</code></pre>
<p>样本运行:</p>
^{pr2}$