[Python] How to send multiple files with Python requests to FastAPI server?

I have the following endpoint in my FastAPI server:

@app.post("/submit")
async def submit(file1: List[UploadFile] = File(...), file2: List[UploadFile] = File(...), file3: List[UploadFile] = File(...)):
# do something
return 'hello'


It works as expected if I use Swagger UI. However, I cannot figure out how to send a POST request to this endpoint using Python requests module. Here is what I've tried:

import requests

headers = {
'accept': 'application/json',
'Content-Type': 'multipart/form-data',
}

files = [
('file1', open('file1.zip', 'rb')),
('file2', open('file2.txt', 'rb')),
('file3', open('file3.rar', 'rb')),
]

response = requests.post('http://localhost:8000/submit', headers=headers, files=files)

print(response.text)


But I am getting an error:

{"detail":"There was an error parsing the body"}

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