Add try catch to pinecone index deletion

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Add try catch to pinecone index deletion

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The task is to add a try-catch block to the Pinecone index deletion process. This is to ensure that if an error occurs during the deletion process, it can be caught and handled appropriately, rather than causing the entire program to crash.

The relevant file for this task is llama_index/vector_stores/pinecone.py. In this file, the delete method of the PineconeVectorStore class is responsible for deleting nodes from the Pinecone index. This is where the try-catch block should be added.

Here is a plan for how to proceed:

1. Identify the lines of code in the delete method that could potentially raise an exception. This is likely to be the call to self._pinecone_index.delete.

2. Surround these lines of code with a try-catch block. In the catch block, log the error and re-raise it or handle it in a way that is appropriate for your application.

Here is a code snippet that shows how this could be done:

def delete(self, ref_doc_id: str, **delete_kwargs: Any) -> None:
    """
    Delete nodes using with ref_doc_id.

    Args:
        ref_doc_id (str): The doc_id of the document to delete.

    """
    # delete by filtering on the doc_id metadata
    try:
        self._pinecone_index.delete(
            filter={"doc_id": {"$eq": ref_doc_id}},
            namespace=self.namespace,
            **delete_kwargs,
        )
    except Exception as e:
        _logger.error(f"Failed to delete node with ref_doc_id {ref_doc_id}: {e}")
        raise

In this code snippet, if an exception is raised during the call to self._pinecone_index.delete, it will be caught and logged, and then re-raised. This allows the error to be handled further up the call stack, while still providing visibility into the error at the point where it occurred.