How to use Logging with multiprocessing in Python3

[buran]

your code works for me as expected.

console:

Output:
yes
yes

error.log

Output:
2020-12-29 11:03:34,853 ERROR    2 is not = 1
2020-12-29 11:03:34,854 ERROR    3 is not = 1
2020-12-29 11:03:34,854 ERROR    4 is not = 1
2020-12-29 11:03:34,854 ERROR    5 is not = 1
2020-12-29 11:03:34,854 ERROR    6 is not = 1
2020-12-29 11:03:34,854 ERROR    7 is not = 1
2020-12-29 11:03:34,855 ERROR    8 is not = 1
2020-12-29 11:03:34,855 ERROR    9 is not = 1
2020-12-29 11:03:34,855 ERROR    10 is not = 1
2020-12-29 11:03:34,855 ERROR    4 is not = 1
2020-12-29 11:03:34,856 ERROR    5 is not = 1
2020-12-29 11:03:34,856 ERROR    4 is not = 1
2020-12-29 11:03:34,856 ERROR    3 is not = 1
2020-12-29 11:03:34,856 ERROR    4 is not = 1
2020-12-29 11:03:34,857 ERROR    5 is not = 1
2020-12-29 11:03:34,857 ERROR    4 is not = 1
2020-12-29 11:03:34,857 ERROR    3 is not = 1
2020-12-29 11:03:34,857 ERROR    4 is not = 1
2020-12-29 11:03:34,858 ERROR    5 is not = 1
2020-12-29 11:03:34,858 ERROR    4 is not = 1
2020-12-29 11:03:34,858 ERROR    3 is not = 1
2020-12-29 11:03:34,858 ERROR    4 is not = 1
2020-12-29 11:03:34,858 ERROR    3 is not = 1

Not sure why would you set max_workers=1 though :-)