requests从一个链接下载存放在临时文件tempfile，python

Python通过requests从一个链接下载存放在临时文件tempfile

import requests
import tempfile
 
 
def download(url):
    r = requests.get(url, stream=True)
    file_len = int(r.headers.get('content-length'))
    tf = tempfile.mktemp(suffix='.zip', dir='./')
 
    f = open(tf, 'wb')
 
    count = 0
    for ch in r:
        count = count + len(ch)
 
        f.write(ch)
 
        progress = ''.format(count / file_len * 100)
        print(f'{count}/{file_len}:{progress}%')
        
    f.close()