多线程下载三种方法

def download(img_url, img_name):

    with closing(requests.get(img_url, stream=True)) as r:

        with open(os.path.join(out_dir, img_name), 'wb') as f:

            fordatainr.iter_content(1024):

                f.write(data)

def get_imgurl_generate():

    with open('./example.txt','r') as f:

        forlinein f:

            line = line.strip()

            yield imgs

lock = threading.Lock()def loop(imgs):

    while True:

        try:

            with lock:

                img_url, img_name = next(imgs)

        except StopIteration:

            break        download_pic(img_url, img_name)

img_gen = imgurl_generate()foriin range(0, thread_num):

    t = threading.Thread(target=loop, args=(img_gen,))

    t.start()