如果要发布带有Python请求的 JSON ，则应不使用data，但json:

If you want to post JSON with python requests, you should NOT use data but json:

r = requests.post('http://httpbin.org/post', json={"key": "value"})

由于您的示例，我只能猜测您正在使用data

I can only guess that you are using data because of your example

payload={url,headers, data={'file-data':{"key1": "3","key2": "6","key3": "8"}},files=files}

这不是有效的python语法.

Whis is not valid python syntax btw.