python 文件下载

#下载大文件
chapters = requests.get(file_url)
with open("xxx.tar.gz",'wb') as f:
    for chunk in chapters.iter_content(chunk_size=1024):
        if chunk:
            f.write(chunk)
print('下载完了……')

#下载小文件
import requests
image_url = "https://www.python.org/static/community_logos/python-logo-master-v3-TM.png"
r = requests.get(image_url) # create HTTP response object
with open("python_logo.png",'wb') as f:
    f.write(r.content)

#批量文件下载
import requests
from bs4 import BeautifulSoup

archive_url = "http://www-personal.umich.edu/~csev/books/py4inf/media/"
def get_video_links():
    r = requests.get(archive_url)
    soup = BeautifulSoup(r.content, 'html5lib')
    links = soup.findAll('a')
    video_links = [archive_url + link['href'] for link in links if link['href'].endswith('mp4')]

    return video_links

def download_video_series(video_links):
    for link in video_links:
        file_name = link.split('/')[-1]
        print("Downloading file:%s" % file_name)
        r = requests.get(link, stream=True)
        # download started
        with open(file_name, 'wb') as f:
            for chunk in r.iter_content(chunk_size=1024 * 1024):
            if chunk:
                f.write(chunk)
        print("%s downloaded!
" % file_name)
        print("All videos downloaded!")
        return

if __name__ == "__main__":
    video_links = get_video_links()
    download_video_series(video_links)