[Python] Python request - the request was rejected because no multipart boundary was found

(I'm still new to API endpoints in python so apologies if I am missing an easy answer here, but I haven't been able to find it.)

I'm trying to make a post request to an endpoint that uses a multipart/form-data request, where you include a file to be uploaded.

I'm attempting to post the following:

import requests

url = &&&
headers = {'Content-Type': 'multipart/form-data',
'Authorization': authtoken,
'x-api-key': x_api_key,
'Accept': 'application/vnd.###.v1+json'}
files = {'file': ('filename.csv', open('filename.csv', 'rb'),'text/csv')}
r = requests.post(url, headers=headers, files=files, verify=False)
r.text


(Note that "&&&" and "###" represent confidential links.)

I get this error:

"status":500,"error":"Internal Server Error","message":"Failed to parse multipart servlet request; nested exception is java.io.IOException: org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found","path":"&&&"

I'm not sure what I'm missing here. Do I need to set a multipart boundary? How can I do so? If it seems like you need more info to answer this question, please let me know.

Thank you!

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