Combine docstores and vectorstores within a storages component (#72)

knowledgehub/storages/vectorstores/__init__.py

@@ -0,0 +1,5 @@
+from .base import BaseVectorStore
+from .chroma import ChromaVectorStore
+from .in_memory import InMemoryVectorStore
+
+__all__ = ["BaseVectorStore", "ChromaVectorStore", "InMemoryVectorStore"]

knowledgehub/storages/vectorstores/base.py

@@ -0,0 +1,154 @@
+from abc import ABC, abstractmethod
+from typing import Any, List, Optional, Tuple, Type, Union
+
+from llama_index.schema import NodeRelationship, RelatedNodeInfo
+from llama_index.vector_stores.types import BasePydanticVectorStore
+from llama_index.vector_stores.types import VectorStore as LIVectorStore
+from llama_index.vector_stores.types import VectorStoreQuery
+
+from ...base import Document
+
+
+class BaseVectorStore(ABC):
+    @abstractmethod
+    def __init__(self, *args, **kwargs):
+        ...
+
+    @abstractmethod
+    def add(
+        self,
+        embeddings: List[List[float]],
+        metadatas: Optional[List[dict]] = None,
+        ids: Optional[List[str]] = None,
+    ) -> List[str]:
+        """Add vector embeddings to vector stores
+
+        Args:
+            embeddings: List of embeddings
+            metadatas: List of metadata of the embeddings
+            ids: List of ids of the embeddings
+            kwargs: meant for vectorstore-specific parameters
+
+        Returns:
+            List of ids of the embeddings
+        """
+        ...
+
+    @abstractmethod
+    def add_from_docs(self, docs: List[Document]):
+        """Add vector embeddings to vector stores
+
+        Args:
+            docs: List of Document objects
+        """
+        ...
+
+    @abstractmethod
+    def delete(self, ids: List[str], **kwargs):
+        """Delete vector embeddings from vector stores
+
+        Args:
+            ids: List of ids of the embeddings to be deleted
+            kwargs: meant for vectorstore-specific parameters
+        """
+        ...
+
+    @abstractmethod
+    def query(
+        self,
+        embedding: List[float],
+        top_k: int = 1,
+        ids: Optional[List[str]] = None,
+        **kwargs,
+    ) -> Tuple[List[List[float]], List[float], List[str]]:
+        """Return the top k most similar vector embeddings
+
+        Args:
+            embedding: List of embeddings
+            top_k: Number of most similar embeddings to return
+            ids: List of ids of the embeddings to be queried
+
+        Returns:
+            the matched embeddings, the similarity scores, and the ids
+        """
+        ...
+
+    @abstractmethod
+    def load(self, *args, **kwargs):
+        pass
+
+    @abstractmethod
+    def save(self, *args, **kwargs):
+        pass
+
+
+class LlamaIndexVectorStore(BaseVectorStore):
+    _li_class: Type[Union[LIVectorStore, BasePydanticVectorStore]]
+
+    def __init__(self, *args, **kwargs):
+        if self._li_class is None:
+            raise AttributeError(
+                "Require `_li_class` to set a VectorStore class from LlamarIndex"
+            )
+
+        self._client = self._li_class(*args, **kwargs)
+
+    def __setattr__(self, name: str, value: Any) -> None:
+        if name.startswith("_"):
+            return super().__setattr__(name, value)
+
+        return setattr(self._client, name, value)
+
+    def __getattr__(self, name: str) -> Any:
+        return getattr(self._client, name)
+
+    def add(
+        self,
+        embeddings: List[List[float]],
+        metadatas: Optional[List[dict]] = None,
+        ids: Optional[List[str]] = None,
+    ):
+        nodes = [Document(embedding=embedding) for embedding in embeddings]
+        if metadatas is not None:
+            for node, metadata in zip(nodes, metadatas):
+                node.metadata = metadata
+        if ids is not None:
+            for node, id in zip(nodes, ids):
+                node.id_ = id
+                node.relationships = {
+                    NodeRelationship.SOURCE: RelatedNodeInfo(node_id=id)
+                }
+
+        return self._client.add(nodes=nodes)  # type: ignore
+
+    def add_from_docs(self, docs: List[Document]):
+        return self._client.add(nodes=docs)  # type: ignore
+
+    def delete(self, ids: List[str], **kwargs):
+        for id_ in ids:
+            self._client.delete(ref_doc_id=id_, **kwargs)
+
+    def query(
+        self,
+        embedding: List[float],
+        top_k: int = 1,
+        ids: Optional[List[str]] = None,
+        **kwargs,
+    ) -> Tuple[List[List[float]], List[float], List[str]]:
+        output = self._client.query(
+            query=VectorStoreQuery(
+                query_embedding=embedding,
+                similarity_top_k=top_k,
+                node_ids=ids,
+                **kwargs,
+            ),
+        )
+
+        embeddings = []
+        if output.nodes:
+            for node in output.nodes:
+                embeddings.append(node.embedding)
+        similarities = output.similarities if output.similarities else []
+        out_ids = output.ids if output.ids else []
+
+        return embeddings, similarities, out_ids

knowledgehub/storages/vectorstores/chroma.py

@@ -0,0 +1,77 @@
+from typing import Any, Dict, List, Optional, Type, cast
+
+from llama_index.vector_stores.chroma import ChromaVectorStore as LIChromaVectorStore
+
+from .base import LlamaIndexVectorStore
+
+
+class ChromaVectorStore(LlamaIndexVectorStore):
+    _li_class: Type[LIChromaVectorStore] = LIChromaVectorStore
+
+    def __init__(
+        self,
+        path: str = "./chroma",
+        collection_name: str = "default",
+        host: str = "localhost",
+        port: str = "8000",
+        ssl: bool = False,
+        headers: Optional[Dict[str, str]] = None,
+        collection_kwargs: Optional[dict] = None,
+        stores_text: bool = True,
+        flat_metadata: bool = True,
+        **kwargs: Any,
+    ):
+        try:
+            import chromadb
+        except ImportError:
+            raise ImportError(
+                "ChromaVectorStore requires chromadb. "
+                "Please install chromadb first `pip install chromadb`"
+            )
+
+        client = chromadb.PersistentClient(path=path)
+        collection = client.get_or_create_collection(collection_name)
+
+        # pass through for nice IDE support
+        super().__init__(
+            chroma_collection=collection,
+            host=host,
+            port=port,
+            ssl=ssl,
+            headers=headers or {},
+            collection_kwargs=collection_kwargs or {},
+            stores_text=stores_text,
+            flat_metadata=flat_metadata,
+            **kwargs,
+        )
+        self._client = cast(LIChromaVectorStore, self._client)
+
+    def delete(self, ids: List[str], **kwargs):
+        """Delete vector embeddings from vector stores
+
+        Args:
+            ids: List of ids of the embeddings to be deleted
+            kwargs: meant for vectorstore-specific parameters
+        """
+        self._client._collection.delete(ids=ids)
+
+    def delete_collection(self, collection_name: Optional[str] = None):
+        """Delete entire collection under specified name from vector stores
+
+        Args:
+            collection_name: Name of the collection to delete
+        """
+        # a rather ugly chain call but it do the job of finding
+        # original chromadb client and call delete_collection() method
+        if collection_name is None:
+            collection_name = self._client.client.name
+        self._client.client._client.delete_collection(collection_name)
+
+    def count(self) -> int:
+        return self._collection.count()
+
+    def save(self, *args, **kwargs):
+        pass
+
+    def load(self, *args, **kwargs):
+        pass

knowledgehub/storages/vectorstores/in_memory.py

@@ -0,0 +1,55 @@
+"""Simple vector store index."""
+
+from typing import Any, Optional, Type
+
+import fsspec
+from llama_index.vector_stores import SimpleVectorStore as LISimpleVectorStore
+from llama_index.vector_stores.simple import SimpleVectorStoreData
+
+from .base import LlamaIndexVectorStore
+
+
+class InMemoryVectorStore(LlamaIndexVectorStore):
+    _li_class: Type[LISimpleVectorStore] = LISimpleVectorStore
+    store_text: bool = False
+
+    def __init__(
+        self,
+        data: Optional[SimpleVectorStoreData] = None,
+        fs: Optional[fsspec.AbstractFileSystem] = None,
+        **kwargs: Any,
+    ) -> None:
+        """Initialize params."""
+        self._data = data or SimpleVectorStoreData()
+        self._fs = fs or fsspec.filesystem("file")
+
+        super().__init__(
+            data=data,
+            fs=fs,
+            **kwargs,
+        )
+
+    def save(
+        self,
+        save_path: str,
+        fs: Optional[fsspec.AbstractFileSystem] = None,
+        **kwargs,
+    ):
+
+        """save a simpleVectorStore to a dictionary.
+
+        Args:
+            save_path: Path of saving vector to disk.
+            fs: An abstract super-class for pythonic file-systems
+        """
+        self._client.persist(persist_path=save_path, fs=fs)
+
+    def load(self, load_path: str, fs: Optional[fsspec.AbstractFileSystem] = None):
+
+        """Create a SimpleKVStore from a load directory.
+
+        Args:
+            load_path: Path of loading vector.
+            fs: An abstract super-class for pythonic file-systems
+        """
+        self._client = self._client.from_persist_path(persist_path=load_path, fs=fs)