使用 requests 提交 multipart form data 时怎么插入一个值为字串的 field

抓包到的请求是这样的：

-----------------------------13151347596532282191711782459
Content-Disposition: form-data; name="fid"

1
-----------------------------13151347596532282191711782459
Content-Disposition: form-data; name="moduleid"

5
-----------------------------13151347596532282191711782459
Content-Disposition: form-data; name="from"

album
-----------------------------13151347596532282191711782459
Content-Disposition: form-data; name="old"


-----------------------------13151347596532282191711782459
Content-Disposition: form-data; name="isremote"

0
-----------------------------13151347596532282191711782459
Content-Disposition: form-data; name="remote"

http://
-----------------------------13151347596532282191711782459
Content-Disposition: form-data; name="upalbum"; filename="\B0·Ұͺ\D5ͼ.png"
Content-Type: image/png

python 代码:

import requests
multipart_form_data = {
    'upalbum': ('111.png', open('1.png', 'rb'), 'image/png'),
    'fid': ('', ''),
    'muduleid': ('', '5'),
    'from': ('', 'album'),
    'old': ('', ''),
    'isremote': ('', '0'),
    'remote': ('', 'http://')
}
requests.post('http://127.0.0.1:8888', files=multipart_form_data)

然后在 fiddle 中看到模拟的请求少了几个 field：

--9b67b0c1b58b473d86ca619bac4bdd0d
Content-Disposition: form-data; name="from"; filename=""

album
--9b67b0c1b58b473d86ca619bac4bdd0d
Content-Disposition: form-data; name="fid"; filename=""


--9b67b0c1b58b473d86ca619bac4bdd0d
Content-Disposition: form-data; name="upalbum"; filename="111.png"
Content-Type: image/png