How do I access the return values of ThreadPoolExecutor?

Question

Say I have the following code:

def func(a,b):
    return (func2(a),func3(3))

def paralel_func(alist,blist)
    with ThreadPoolExecutor(max_workers=None) as executor:
        executor.map(func,alist,blist)

How do I access the return values that were returned from func ? I tried to figure it out myself by thinking that executor.map is a list that holds the values but that didnt work for me.

Answer 1

I don't know where your alist and blist variables are coming from, but you could do something like this.

import concurrent.futures

def func(a, b):
    return (func2(a),func3(3))

def parallel_func(alist, blist):
    processes = []
    with import concurrent.futures.ThreadPoolExecutor(max_workers=None) as executor:
        processes.append(executor.submit(func, alist, blist))
        
        for _ in concurrent.futures.as_completed(processes):
            print('Result: ', _.result())