多进程与多线程

1. 多线程

from concurrent.futures import ThreadPoolExecutor

with ThreadPoolExecutor(max_workers=4) as pool:
  results = pool.map(fetch_url, urls)

2. 多进程

from multiprocessing import Pool

with Pool(4) as pool:
  results = pool.map(heavy_compute, data)

3. GIL 限制