diff --git a/docs/modules/utils/combine_docs_examples/vectorstores.ipynb b/docs/modules/utils/combine_docs_examples/vectorstores.ipynb index 6ead1c85..a10891ac 100644 --- a/docs/modules/utils/combine_docs_examples/vectorstores.ipynb +++ b/docs/modules/utils/combine_docs_examples/vectorstores.ipynb @@ -16,7 +16,7 @@ }, { "cell_type": "code", - "execution_count": 3, + "execution_count": 1, "id": "965eecee", "metadata": { "pycharm": { @@ -32,7 +32,7 @@ }, { "cell_type": "code", - "execution_count": 4, + "execution_count": 2, "id": "68481687", "metadata": { "pycharm": { @@ -51,7 +51,7 @@ }, { "cell_type": "code", - "execution_count": 5, + "execution_count": 3, "id": "015f4ff5", "metadata": { "pycharm": { @@ -210,39 +210,27 @@ }, { "cell_type": "code", - "execution_count": 12, + "execution_count": 4, "id": "b58b3955", "metadata": {}, "outputs": [], "source": [ - "import pickle" + "docsearch.save_local(\"faiss_index\")" ] }, { "cell_type": "code", - "execution_count": 14, - "id": "1897e23d", - "metadata": {}, - "outputs": [], - "source": [ - "with open(\"foo.pkl\", 'wb') as f:\n", - " pickle.dump(docsearch, f)" - ] - }, - { - "cell_type": "code", - "execution_count": 15, - "id": "bf3732f1", + "execution_count": 5, + "id": "ca72c650", "metadata": {}, "outputs": [], "source": [ - "with open(\"foo.pkl\", 'rb') as f:\n", - " new_docsearch = pickle.load(f)" + "new_docsearch = FAISS.load_local(\"faiss_index\", embeddings)" ] }, { "cell_type": "code", - "execution_count": 16, + "execution_count": 6, "id": "5bf2ee24", "metadata": {}, "outputs": [], @@ -252,7 +240,7 @@ }, { "cell_type": "code", - "execution_count": 18, + "execution_count": 7, "id": "edc2aad1", "metadata": {}, "outputs": [ @@ -262,7 +250,7 @@ "Document(page_content='In state after state, new laws have been passed, not only to suppress the vote, but to subvert entire elections. \\n\\nWe cannot let this happen. \\n\\nTonight. I call on the Senate to: Pass the Freedom to Vote Act. Pass the John Lewis Voting Rights Act. And while you’re at it, pass the Disclose Act so Americans can know who is funding our elections. \\n\\nTonight, I’d like to honor someone who has dedicated his life to serve this country: Justice Stephen Breyer—an Army veteran, Constitutional scholar, and retiring Justice of the United States Supreme Court. Justice Breyer, thank you for your service. \\n\\nOne of the most serious constitutional responsibilities a President has is nominating someone to serve on the United States Supreme Court. \\n\\nAnd I did that 4 days ago, when I nominated Circuit Court of Appeals Judge Ketanji Brown Jackson. One of our nation’s top legal minds, who will continue Justice Breyer’s legacy of excellence.', lookup_str='', metadata={}, lookup_index=0)" ] }, - "execution_count": 18, + "execution_count": 7, "metadata": {}, "output_type": "execute_result" } diff --git a/langchain/vectorstores/faiss.py b/langchain/vectorstores/faiss.py index 714d4e7b..b3d532d9 100644 --- a/langchain/vectorstores/faiss.py +++ b/langchain/vectorstores/faiss.py @@ -1,7 +1,9 @@ """Wrapper around FAISS vector database.""" from __future__ import annotations +import pickle import uuid +from pathlib import Path from typing import Any, Callable, Dict, Iterable, List, Optional, Tuple import numpy as np @@ -201,20 +203,39 @@ class FAISS(VectorStore): ) return cls(embedding.embed_query, index, docstore, index_to_id) - def save_local(self, path: str) -> None: - """Save FAISS index to disk. + def save_local(self, folder_path: str) -> None: + """Save FAISS index, docstore, and index_to_docstore_id to disk. Args: - path: Path to save FAISS index to. + folder_path: folder path to save index, docstore, + and index_to_docstore_id to. """ + path = Path(folder_path) + path.mkdir(exist_ok=True, parents=True) + + # save index separately since it is not picklable faiss = dependable_faiss_import() - faiss.write_index(self.index, path) + faiss.write_index(self.index, str(path / "index.faiss")) + + # save docstore and index_to_docstore_id + with open(path / "index.pkl", "wb") as f: + pickle.dump((self.docstore, self.index_to_docstore_id), f) - def load_local(self, path: str) -> None: - """Load FAISS index from disk. + @classmethod + def load_local(cls, folder_path: str, embeddings: Embeddings) -> FAISS: + """Load FAISS index, docstore, and index_to_docstore_id to disk. Args: - path: Path to load FAISS index from. + folder_path: folder path to load index, docstore, + and index_to_docstore_id from. + embeddings: Embeddings to use when generating queries """ + path = Path(folder_path) + # load index separately since it is not picklable faiss = dependable_faiss_import() - self.index = faiss.read_index(path) + index = faiss.read_index(str(path / "index.faiss")) + + # load docstore and index_to_docstore_id + with open(path / "index.pkl", "rb") as f: + docstore, index_to_docstore_id = pickle.load(f) + return cls(embeddings.embed_query, index, docstore, index_to_docstore_id) diff --git a/tests/integration_tests/vectorstores/test_faiss.py b/tests/integration_tests/vectorstores/test_faiss.py index 690654f7..3ee396f3 100644 --- a/tests/integration_tests/vectorstores/test_faiss.py +++ b/tests/integration_tests/vectorstores/test_faiss.py @@ -85,6 +85,5 @@ def test_faiss_local_save_load() -> None: with tempfile.NamedTemporaryFile() as temp_file: docsearch.save_local(temp_file.name) - docsearch.index = None - docsearch.load_local(temp_file.name) - assert docsearch.index is not None + new_docsearch = FAISS.load_local(temp_file.name, FakeEmbeddings()) + assert new_docsearch.index is not None