pool = multiprocessing.Pool(processes=10)
row = [...]
for row in rows:
task_id = row[1]
img_id = row[0]
pool.apply_async(check_picture_contain_human_or_dog, (task_id, img_id))
pool.close()
pool.join()
原文：https://www.cnblogs.com/tanghuang/p/9786052.html