[Bug] asyncio sdk error when deleting vectors

[swmoon00]

Is this a new bug?

• I believe this is a new bug
• I have searched the existing Github issues and Community Forum, and I could not find an existing post for this bug

Describe the bug
I am using pinecone python client with asyncio. When I try to delete the vectors from my index, the asyncio sdk client gives me an error.

Error information

Traceback (most recent call last):
  File "/Users/tony/tl-embed/repro.py", line 42, in <module>
    asyncio.run(main())
  File "/opt/homebrew/Cellar/python@3.12/3.12.12/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/runners.py", line 195, in run
    return runner.run(main)
           ^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/python@3.12/3.12.12/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/runners.py", line 118, in run
    return self._loop.run_until_complete(task)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/python@3.12/3.12.12/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/base_events.py", line 691, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/Users/tony/tl-embed/repro.py", line 36, in main
    await model_index.delete(namespace="test-namespace", delete_all=True)
  File "/Users/tony/tl-embed/.venv/lib/python3.12/site-packages/pinecone/db_data/index_asyncio.py", line 410, in delete
    result = await self._vector_api.delete_vectors(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tony/tl-embed/.venv/lib/python3.12/site-packages/pinecone/openapi_support/asyncio_endpoint.py", line 90, in __call__
    return await self.callable(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tony/tl-embed/.venv/lib/python3.12/site-packages/pinecone/core/openapi/db_data/api/vector_operations_api.py", line 975, in __delete_vectors
    return cast(Dict[str, Any], await self.call_with_http_info(**kwargs))
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tony/tl-embed/.venv/lib/python3.12/site-packages/pinecone/openapi_support/asyncio_endpoint.py", line 122, in call_with_http_info
    return await self.api_client.call_api(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tony/tl-embed/.venv/lib/python3.12/site-packages/pinecone/openapi_support/asyncio_api_client.py", line 274, in call_api
    return await self.__call_api(
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tony/tl-embed/.venv/lib/python3.12/site-packages/pinecone/openapi_support/asyncio_api_client.py", line 182, in __call_api
    setattr(return_data, "_response_info", response_info)
AttributeError: 'str' object has no attribute '_response_info'
Unclosed client session
client_session: <aiohttp.client.ClientSession object at 0x106d64ec0>
Unclosed connector
connections: ['deque([(<aiohttp.client_proto.ResponseHandler object at 0x1076876b0>, 139630.271451083)])']
connector: <aiohttp.connector.TCPConnector object at 0x107608920>

Steps to reproduce the issue locally
First, run the pinecone-local container on the local machine.

docker run -it --rm \
  --name pinecone \
  --platform linux/amd64 \
  -e PORT=15080 \
  -e PINECONE_HOST=localhost \
  -p 15080-15090:15080-15090 \
  ghcr.io/pinecone-io/pinecone-local:latest

Then run the repro code.

"""Repro."""
import asyncio

import numpy as np
import pinecone


async def main():
    """Repro main."""
    index_name = "test-pinecone-index"
    pinecone_client = pinecone.Pinecone(api_key="test-api-key", host="http://localhost:15080")

    if pinecone_client.has_index(index_name):
        pinecone_client.delete_index(index_name)

    pinecone_client.create_index(
        name=index_name,
        dimension=512,
        metric="cosine",
        spec=pinecone.ServerlessSpec(cloud="aws", region="us-east-1"),
        deletion_protection="disabled",
    )

    index_host = f"http://{pinecone_client.describe_index(index_name)['host']}"

    model_index = pinecone_client.IndexAsyncio(host=index_host)

    await model_index.upsert(
        vectors=[
            ("vec1", np.random.rand(512).astype(np.float32).tolist()),
            ("vec2", np.random.rand(512).astype(np.float32).tolist()),
        ],
        namespace="test-namespace",
    )

    await model_index.delete(namespace="test-namespace", delete_all=True)

    pinecone_client.delete_index(index_name)


if __name__ == "__main__":
    asyncio.run(main())

Environment

• OS Version: MacOS Tahoe 26.1
• Python version: 3.12.12
• Python SDK version: 8.0.0