cpython/Lib/test/test_importlib/partial/cfimport.py
Antoine Pitrou ac17ed60f2
[3.9] bpo-43517: Fix false positive in detection of circular imports (GH-24895) (GH-24948)
(cherry picked from commit 2fd16ef406)

Co-authored-by: Antoine Pitrou <antoine@python.org>

Automerge-Triggered-By: GH:pitrou
2021-03-20 12:40:18 -07:00

38 lines
825 B
Python

import os
import sys
import threading
import traceback
NLOOPS = 50
NTHREADS = 30
def t1():
try:
from concurrent.futures import ThreadPoolExecutor
except Exception:
traceback.print_exc()
os._exit(1)
def t2():
try:
from concurrent.futures.thread import ThreadPoolExecutor
except Exception:
traceback.print_exc()
os._exit(1)
def main():
for j in range(NLOOPS):
threads = []
for i in range(NTHREADS):
threads.append(threading.Thread(target=t2 if i % 1 else t1))
for thread in threads:
thread.start()
for thread in threads:
thread.join()
sys.modules.pop('concurrent.futures', None)
sys.modules.pop('concurrent.futures.thread', None)
if __name__ == "__main__":
main()