Python线程池

ThreadPoolExecutor 使用语法

from cuncurrent.futures import ThreadPoolExecutor,as_completed

 

• 用法1（注意map的结果和入参是顺序对应的）

  • 简单

with ThreadPoolExecutor() as pool:
    results = pool.map(craw,urls) #craw:函数名 urls:参数列表（多个）
    for result in results:
        print(result)

• 用法2（注意如果用as_completed顺序是不定的）

  • 更强大(执行完哪个就返回哪个)

with ThreadPoolExecutor() as pool:
    futures = [pool.submit(craw,url) for url in urls]
    for future in futures:
        print(future.result())
    for future in as_completed(futures):
        print(future.result())