Uploading PDF via Files API and using in Streaming gives 400 bad request

Confirm this is an issue with the Python library and not an underlying OpenAI API

• This is an issue with the Python library

Describe the bug

File "/Users/emdray/code/work/scoutos/services/big_boi/.venv/lib/python3.13/site-packages/openai/_base_client.py", line 1584, in request
raise self._make_status_error_from_response(err.response) from None

openai.BadRequestError: Error code: 400 - {'error': {'message': "Invalid file data: 'file_id'. Expected a file with an application/pdf MIME type, but got unsupported MIME type 'None'.", 'type': 'invalid_request_error', 'param': 'file_id', 'code': 'invalid_value'}}

To Reproduce

Upload a file with the client sending the file bytes
Use the file id in the messages

Code snippets

file_metadata = await client.files.create(file=file_bytes, purpose="user_data")

messages = [
    {
     'role': 'user', 
     'content': 
         [
           {
            'type': 'file',
            'file': {'file_id': <file_metadata.id> }
           },
          {'role': 'user','content': 'summarize'},
         ]
      }, 
]

OS

macos

Python version

v3.12.0

Library version

1.93.1