twython upload_media from tempfiles

Question

所以我寫了一個bot，從維基百科（帶請求）中提取圖像並將它們發佈到twitter（與twython）。我發現this，這使我相信我可以做類似

import tempfile 

import twython 
import requests 
... 
    req = requests.get(img_url, stream=True) 
    with tempfile.TemporaryFile() as img_file: 
     for chunk in req: 
      img_file.write(req) 
     resp = twython_client.upload_media(media=img_file) 
    return resp['media_id'] 

但upload_media調用拋出400S。像

... 
    with open('tmp_img_file', 'wb') as img_file: 
     for chunk in req: 
      img_file.write(chunk) 
    with open('tmp_img_file', 'rb') as img_file: 
     resp = twython_client.upload_media(media=img_file) 
    os.remove('tmp_img_file') 
    return resp['media_id'] 

東西確實工作，但不是「創造被使用後立即刪除臨時文件」 的臨時文件的整點？我錯過了什麼/做錯了什麼？

Answer 1

寫作前移文件位置，所以你要做的

with tempfile.TemporaryFile() as f: 
    f.write(data_to_write) 
    f.seek(0) 
    read_data = f.read()