下载三种方法

import os

os.makedirs('./image/', exist_ok=True)

IMAGE_URL = "http://image.nationalgeographic.com.cn/2017/1122/20171122113404332.jpg"

def urllib_download():

    from urllib.request import urlretrieve

    urlretrieve(IMAGE_URL, './image/img1.png')   

def request_download():

    import requests

    r = requests.get(IMAGE_URL)

    with open('./image/img2.png', 'wb') as f:

        f.write(r.content)

def chunk_download():

    import requests

    r = requests.get(IMAGE_URL, stream=True)   

    with open('./image/img3.png', 'wb') as f:

        for chunk in r.iter_content(chunk_size=32):

            f.write(chunk)

urllib_download()

request_download()

chunk_download()