Python中从URL中获取文件名使用requests下载文件

代码如下

def download_file(dir_path, url):
    path = urlparse.urlsplit(url).path
    filename = posixpath.basename(path)
    r = requests.get(url, stream=True)
    print r.status_code
    if r.status_code == 200:
        with open(os.path.join(dir_path, filename), "wb") as f:
            for chunk in r.iter_content(chunk_size=512):
                if chunk:
                    f.write(chunk)