Python: pool.map_async with multiple parameters

Asked Jul 27 '23 at 20:20

Active Jul 27 '23 at 20:26

Viewed 22 times

I need some help with python pool.

def read_values(entry, second):
 ....

async_output = pool.map_async(partial(read_values, second='second'), string_array)
output_array = async_output.get()

The above code is working. I really want the below:

logfile = open("./async.log", "a+", 1)

def read_values(entry, second):
 ....

async_output = pool.map_async(partial(read_values, second=logfile), string_array)
output_array = async_output.get()

This is not working!

Is it possible to pass an open file reference to a pool?

edited Jul 27 '23 at 20:26

asked Jul 27 '23 at 20:20

ScubaInstructor

Please describe the error beyond "not working" .If there is a traceback, included that. – tdelaney Jul 27 '23 at 20:32
You probably have to put the file reference in a `multiprocessing.Manager` so you can share it between the processes. – Barmar Jul 27 '23 at 20:32
The file object won't serialize. You could pass in the file name and let the worker process open it. – tdelaney Jul 27 '23 at 20:33
@tdelaney You are correct, that is the reason it is not working. – ScubaInstructor Aug 21 '23 at 09:00

Python: pool.map_async with multiple parameters

0 Answers0