langchain[patch]: Migrate retrievers to use optional langchain community imports (#21155)

libs/community/langchain_community/retrievers/__init__.py

@@ -28,7 +28,8 @@ if TYPE_CHECKING:
     from langchain_community.retrievers.arxiv import (
         ArxivRetriever,
     )
-    from langchain_community.retrievers.azure_cognitive_search import (
+    from langchain_community.retrievers.azure_ai_search import (
+        AzureAISearchRetriever,
         AzureCognitiveSearchRetriever,
     )
     from langchain_community.retrievers.bedrock import (
@@ -100,6 +101,9 @@ if TYPE_CHECKING:
     from langchain_community.retrievers.qdrant_sparse_vector_retriever import (
         QdrantSparseVectorRetriever,
     )
+    from langchain_community.retrievers.rememberizer import (
+        RememberizerRetriever,
+    )
     from langchain_community.retrievers.remote_retriever import (
         RemoteLangChainRetriever,
     )
@@ -112,6 +116,7 @@ if TYPE_CHECKING:
     from langchain_community.retrievers.tfidf import (
         TFIDFRetriever,
     )
+    from langchain_community.retrievers.thirdai_neuraldb import NeuralDBRetriever
     from langchain_community.retrievers.vespa_retriever import (
         VespaRetriever,
     )
@@ -131,46 +136,6 @@ if TYPE_CHECKING:
         ZillizRetriever,
     )
 
-__all__ = [
-    "AmazonKendraRetriever",
-    "AmazonKnowledgeBasesRetriever",
-    "ArceeRetriever",
-    "ArxivRetriever",
-    "AzureCognitiveSearchRetriever",
-    "BM25Retriever",
-    "BreebsRetriever",
-    "ChaindeskRetriever",
-    "ChatGPTPluginRetriever",
-    "CohereRagRetriever",
-    "DocArrayRetriever",
-    "DriaRetriever",
-    "ElasticSearchBM25Retriever",
-    "EmbedchainRetriever",
-    "GoogleCloudEnterpriseSearchRetriever",
-    "GoogleDocumentAIWarehouseRetriever",
-    "GoogleVertexAIMultiTurnSearchRetriever",
-    "GoogleVertexAISearchRetriever",
-    "KNNRetriever",
-    "KayAiRetriever",
-    "LlamaIndexGraphRetriever",
-    "LlamaIndexRetriever",
-    "MetalRetriever",
-    "MilvusRetriever",
-    "OutlineRetriever",
-    "PineconeHybridSearchRetriever",
-    "PubMedRetriever",
-    "QdrantSparseVectorRetriever",
-    "RemoteLangChainRetriever",
-    "SVMRetriever",
-    "TFIDFRetriever",
-    "TavilySearchAPIRetriever",
-    "VespaRetriever",
-    "WeaviateHybridSearchRetriever",
-    "WikipediaRetriever",
-    "YouRetriever",
-    "ZepRetriever",
-    "ZillizRetriever",
-]
 
 _module_lookup = {
     "AmazonKendraRetriever": "langchain_community.retrievers.kendra",
@@ -224,4 +189,46 @@ def __getattr__(name: str) -> Any:
     raise AttributeError(f"module {__name__} has no attribute {name}")
 
 
-__all__ = list(_module_lookup.keys())
+__all__ = [
+    "AmazonKendraRetriever",
+    "AmazonKnowledgeBasesRetriever",
+    "ArceeRetriever",
+    "ArxivRetriever",
+    "AzureCognitiveSearchRetriever",
+    "AzureAISearchRetriever",
+    "BM25Retriever",
+    "BreebsRetriever",
+    "ChaindeskRetriever",
+    "ChatGPTPluginRetriever",
+    "CohereRagRetriever",
+    "DocArrayRetriever",
+    "DriaRetriever",
+    "ElasticSearchBM25Retriever",
+    "EmbedchainRetriever",
+    "GoogleCloudEnterpriseSearchRetriever",
+    "GoogleDocumentAIWarehouseRetriever",
+    "GoogleVertexAIMultiTurnSearchRetriever",
+    "GoogleVertexAISearchRetriever",
+    "KNNRetriever",
+    "KayAiRetriever",
+    "LlamaIndexGraphRetriever",
+    "LlamaIndexRetriever",
+    "MetalRetriever",
+    "MilvusRetriever",
+    "NeuralDBRetriever",
+    "OutlineRetriever",
+    "PineconeHybridSearchRetriever",
+    "PubMedRetriever",
+    "QdrantSparseVectorRetriever",
+    "RememberizerRetriever",
+    "RemoteLangChainRetriever",
+    "SVMRetriever",
+    "TFIDFRetriever",
+    "TavilySearchAPIRetriever",
+    "VespaRetriever",
+    "WeaviateHybridSearchRetriever",
+    "WikipediaRetriever",
+    "YouRetriever",
+    "ZepRetriever",
+    "ZillizRetriever",
+]

libs/community/tests/unit_tests/retrievers/test_imports.py

@@ -32,6 +32,8 @@ EXPECTED_ALL = [
     "RememberizerRetriever",
     "SVMRetriever",
     "TavilySearchAPIRetriever",
+    "NeuralDBRetriever",
+    "RememberizerRetriever",
     "TFIDFRetriever",
     "BM25Retriever",
     "VespaRetriever",

libs/langchain/langchain/retrievers/__init__.py

@@ -17,7 +17,7 @@ the backbone of a retriever, but there are other types of retrievers as well.
     Document, Serializable, Callbacks,
     CallbackManagerForRetrieverRun, AsyncCallbackManagerForRetrieverRun
 """
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
 from langchain._api.module_import import create_importer
 from langchain.retrievers.contextual_compression import ContextualCompressionRetriever
@@ -34,14 +34,96 @@ from langchain.retrievers.time_weighted_retriever import (
 )
 from langchain.retrievers.web_research import WebResearchRetriever
 
-import_lookup = create_importer(
+if TYPE_CHECKING:
-    __package__, fallback_module="langchain_community.retrievers"
+    from langchain_community.retrievers import (
-)
+        AmazonKendraRetriever,
+        AmazonKnowledgeBasesRetriever,
+        ArceeRetriever,
+        ArxivRetriever,
+        AzureAISearchRetriever,
+        AzureCognitiveSearchRetriever,
+        BM25Retriever,
+        ChaindeskRetriever,
+        ChatGPTPluginRetriever,
+        CohereRagRetriever,
+        DocArrayRetriever,
+        DriaRetriever,
+        ElasticSearchBM25Retriever,
+        EmbedchainRetriever,
+        GoogleCloudEnterpriseSearchRetriever,
+        GoogleDocumentAIWarehouseRetriever,
+        GoogleVertexAIMultiTurnSearchRetriever,
+        GoogleVertexAISearchRetriever,
+        KayAiRetriever,
+        KNNRetriever,
+        LlamaIndexGraphRetriever,
+        LlamaIndexRetriever,
+        MetalRetriever,
+        MilvusRetriever,
+        NeuralDBRetriever,
+        OutlineRetriever,
+        PineconeHybridSearchRetriever,
+        PubMedRetriever,
+        RemoteLangChainRetriever,
+        SVMRetriever,
+        TavilySearchAPIRetriever,
+        TFIDFRetriever,
+        VespaRetriever,
+        WeaviateHybridSearchRetriever,
+        WikipediaRetriever,
+        ZepRetriever,
+        ZillizRetriever,
+    )
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "AmazonKendraRetriever": "langchain_community.retrievers",
+    "AmazonKnowledgeBasesRetriever": "langchain_community.retrievers",
+    "ArceeRetriever": "langchain_community.retrievers",
+    "ArxivRetriever": "langchain_community.retrievers",
+    "AzureAISearchRetriever": "langchain_community.retrievers",
+    "AzureCognitiveSearchRetriever": "langchain_community.retrievers",
+    "ChatGPTPluginRetriever": "langchain_community.retrievers",
+    "ChaindeskRetriever": "langchain_community.retrievers",
+    "CohereRagRetriever": "langchain_community.retrievers",
+    "ElasticSearchBM25Retriever": "langchain_community.retrievers",
+    "EmbedchainRetriever": "langchain_community.retrievers",
+    "GoogleDocumentAIWarehouseRetriever": "langchain_community.retrievers",
+    "GoogleCloudEnterpriseSearchRetriever": "langchain_community.retrievers",
+    "GoogleVertexAIMultiTurnSearchRetriever": "langchain_community.retrievers",
+    "GoogleVertexAISearchRetriever": "langchain_community.retrievers",
+    "KayAiRetriever": "langchain_community.retrievers",
+    "KNNRetriever": "langchain_community.retrievers",
+    "LlamaIndexGraphRetriever": "langchain_community.retrievers",
+    "LlamaIndexRetriever": "langchain_community.retrievers",
+    "MetalRetriever": "langchain_community.retrievers",
+    "MilvusRetriever": "langchain_community.retrievers",
+    "OutlineRetriever": "langchain_community.retrievers",
+    "PineconeHybridSearchRetriever": "langchain_community.retrievers",
+    "PubMedRetriever": "langchain_community.retrievers",
+    "RemoteLangChainRetriever": "langchain_community.retrievers",
+    "SVMRetriever": "langchain_community.retrievers",
+    "TavilySearchAPIRetriever": "langchain_community.retrievers",
+    "TFIDFRetriever": "langchain_community.retrievers",
+    "BM25Retriever": "langchain_community.retrievers",
+    "VespaRetriever": "langchain_community.retrievers",
+    "NeuralDBRetriever": "langchain_community.retrievers",
+    "DriaRetriever": "langchain_community.retrievers",
+    "WeaviateHybridSearchRetriever": "langchain_community.retrievers",
+    "WikipediaRetriever": "langchain_community.retrievers",
+    "ZepRetriever": "langchain_community.retrievers",
+    "ZillizRetriever": "langchain_community.retrievers",
+    "DocArrayRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
 
 
 def __getattr__(name: str) -> Any:
-    """Import retrievers from langchain_community."""
+    """Look up attributes dynamically."""
-    return import_lookup(name)
+    return _import_attribute(name)
 
 
 __all__ = [
@@ -51,14 +133,18 @@ __all__ = [
     "ArxivRetriever",
     "AzureAISearchRetriever",
     "AzureCognitiveSearchRetriever",
-    "ChatGPTPluginRetriever",
+    "BM25Retriever",
-    "ContextualCompressionRetriever",
     "ChaindeskRetriever",
+    "ChatGPTPluginRetriever",
     "CohereRagRetriever",
+    "ContextualCompressionRetriever",
+    "DocArrayRetriever",
+    "DriaRetriever",
     "ElasticSearchBM25Retriever",
     "EmbedchainRetriever",
-    "GoogleDocumentAIWarehouseRetriever",
+    "EnsembleRetriever",
     "GoogleCloudEnterpriseSearchRetriever",
+    "GoogleDocumentAIWarehouseRetriever",
     "GoogleVertexAIMultiTurnSearchRetriever",
     "GoogleVertexAISearchRetriever",
     "KayAiRetriever",
@@ -69,25 +155,23 @@ __all__ = [
     "MetalRetriever",
     "MilvusRetriever",
     "MultiQueryRetriever",
+    "MultiVectorRetriever",
     "OutlineRetriever",
+    "ParentDocumentRetriever",
     "PineconeHybridSearchRetriever",
     "PubMedRetriever",
     "RemoteLangChainRetriever",
-    "SVMRetriever",
+    "RePhraseQueryRetriever",
     "SelfQueryRetriever",
+    "SVMRetriever",
     "TavilySearchAPIRetriever",
     "TFIDFRetriever",
-    "BM25Retriever",
     "TimeWeightedVectorStoreRetriever",
     "VespaRetriever",
     "WeaviateHybridSearchRetriever",
+    "WebResearchRetriever",
     "WikipediaRetriever",
     "ZepRetriever",
+    "NeuralDBRetriever",
     "ZillizRetriever",
-    "DocArrayRetriever",
-    "RePhraseQueryRetriever",
-    "WebResearchRetriever",
-    "EnsembleRetriever",
-    "ParentDocumentRetriever",
-    "MultiVectorRetriever",
 ]

libs/langchain/langchain/retrievers/arcee.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.arcee import ArceeRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["ArceeRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import ArceeRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"ArceeRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "ArceeRetriever",
+]

libs/langchain/langchain/retrievers/arxiv.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.arxiv import ArxivRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["ArxivRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import ArxivRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"ArxivRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "ArxivRetriever",
+]

libs/langchain/langchain/retrievers/azure_ai_search.py

@@ -1,6 +1,30 @@
-from langchain_community.retrievers.azure_ai_search import (
+from typing import TYPE_CHECKING, Any
+
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import (
         AzureAISearchRetriever,
         AzureCognitiveSearchRetriever,
-)
+    )
 
-__all__ = ["AzureAISearchRetriever", "AzureCognitiveSearchRetriever"]
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "AzureAISearchRetriever": "langchain_community.retrievers",
+    "AzureCognitiveSearchRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "AzureAISearchRetriever",
+    "AzureCognitiveSearchRetriever",
+]

libs/langchain/langchain/retrievers/bedrock.py

@@ -1,7 +1,33 @@
-from langchain_community.retrievers.bedrock import (
+from typing import TYPE_CHECKING, Any
-    AmazonKnowledgeBasesRetriever,
+
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import AmazonKnowledgeBasesRetriever
+    from langchain_community.retrievers.bedrock import (
         RetrievalConfig,
         VectorSearchConfig,
-)
+    )
 
-__all__ = ["VectorSearchConfig", "RetrievalConfig", "AmazonKnowledgeBasesRetriever"]
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "VectorSearchConfig": "langchain_community.retrievers.bedrock",
+    "RetrievalConfig": "langchain_community.retrievers.bedrock",
+    "AmazonKnowledgeBasesRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "VectorSearchConfig",
+    "RetrievalConfig",
+    "AmazonKnowledgeBasesRetriever",
+]

libs/langchain/langchain/retrievers/bm25.py

@@ -1,6 +1,28 @@
-from langchain_community.retrievers.bm25 import (
+from typing import TYPE_CHECKING, Any
-    BM25Retriever,
-    default_preprocessing_func,
-)
 
-__all__ = ["default_preprocessing_func", "BM25Retriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import BM25Retriever
+    from langchain_community.retrievers.bm25 import default_preprocessing_func
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "default_preprocessing_func": "langchain_community.retrievers.bm25",
+    "BM25Retriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "default_preprocessing_func",
+    "BM25Retriever",
+]

libs/langchain/langchain/retrievers/chaindesk.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.chaindesk import ChaindeskRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["ChaindeskRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import ChaindeskRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"ChaindeskRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "ChaindeskRetriever",
+]

libs/langchain/langchain/retrievers/chatgpt_plugin_retriever.py

@@ -1,5 +1,23 @@
-from langchain_community.retrievers.chatgpt_plugin_retriever import (
+from typing import TYPE_CHECKING, Any
-    ChatGPTPluginRetriever,
-)
 
-__all__ = ["ChatGPTPluginRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import ChatGPTPluginRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"ChatGPTPluginRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "ChatGPTPluginRetriever",
+]

libs/langchain/langchain/retrievers/cohere_rag_retriever.py

@@ -1,5 +1,23 @@
-from langchain_community.retrievers.cohere_rag_retriever import (
+from typing import TYPE_CHECKING, Any
-    CohereRagRetriever,
-)
 
-__all__ = ["CohereRagRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import CohereRagRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"CohereRagRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "CohereRagRetriever",
+]

libs/langchain/langchain/retrievers/databerry.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.databerry import DataberryRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["DataberryRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers.databerry import DataberryRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"DataberryRetriever": "langchain_community.retrievers.databerry"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "DataberryRetriever",
+]

libs/langchain/langchain/retrievers/docarray.py

@@ -1,3 +1,28 @@
-from langchain_community.retrievers.docarray import DocArrayRetriever, SearchType
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["SearchType", "DocArrayRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import DocArrayRetriever
+    from langchain_community.retrievers.docarray import SearchType
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "SearchType": "langchain_community.retrievers.docarray",
+    "DocArrayRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "SearchType",
+    "DocArrayRetriever",
+]

libs/langchain/langchain/retrievers/elastic_search_bm25.py

@@ -1,5 +1,23 @@
-from langchain_community.retrievers.elastic_search_bm25 import (
+from typing import TYPE_CHECKING, Any
-    ElasticSearchBM25Retriever,
-)
 
-__all__ = ["ElasticSearchBM25Retriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import ElasticSearchBM25Retriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"ElasticSearchBM25Retriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "ElasticSearchBM25Retriever",
+]

libs/langchain/langchain/retrievers/embedchain.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.embedchain import EmbedchainRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["EmbedchainRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import EmbedchainRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"EmbedchainRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "EmbedchainRetriever",
+]

libs/langchain/langchain/retrievers/google_cloud_documentai_warehouse.py

@@ -1,5 +1,25 @@
-from langchain_community.retrievers.google_cloud_documentai_warehouse import (
+from typing import TYPE_CHECKING, Any
-    GoogleDocumentAIWarehouseRetriever,
-)
 
-__all__ = ["GoogleDocumentAIWarehouseRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import GoogleDocumentAIWarehouseRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "GoogleDocumentAIWarehouseRetriever": "langchain_community.retrievers"
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "GoogleDocumentAIWarehouseRetriever",
+]

libs/langchain/langchain/retrievers/google_vertex_ai_search.py

@@ -1,8 +1,30 @@
-from langchain_community.retrievers.google_vertex_ai_search import (
+from typing import TYPE_CHECKING, Any
+
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import (
         GoogleCloudEnterpriseSearchRetriever,
         GoogleVertexAIMultiTurnSearchRetriever,
         GoogleVertexAISearchRetriever,
-)
+    )
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "GoogleVertexAISearchRetriever": "langchain_community.retrievers",
+    "GoogleVertexAIMultiTurnSearchRetriever": "langchain_community.retrievers",
+    "GoogleCloudEnterpriseSearchRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
 
 __all__ = [
     "GoogleVertexAISearchRetriever",

libs/langchain/langchain/retrievers/kay.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.kay import KayAiRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["KayAiRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import KayAiRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"KayAiRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "KayAiRetriever",
+]

libs/langchain/langchain/retrievers/kendra.py

@@ -1,10 +1,14 @@
-from langchain_community.retrievers.kendra import (
+from typing import TYPE_CHECKING, Any
+
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import AmazonKendraRetriever
+    from langchain_community.retrievers.kendra import (
         AdditionalResultAttribute,
         AdditionalResultAttributeValue,
-    AmazonKendraRetriever,
         DocumentAttribute,
         DocumentAttributeValue,
-    DocumentAttributeValueType,
         Highlight,
         QueryResult,
         QueryResultItem,
@@ -14,12 +18,39 @@ from langchain_community.retrievers.kendra import (
         TextWithHighLights,
         clean_excerpt,
         combined_text,
-)
+    )
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "clean_excerpt": "langchain_community.retrievers.kendra",
+    "combined_text": "langchain_community.retrievers.kendra",
+    "Highlight": "langchain_community.retrievers.kendra",
+    "TextWithHighLights": "langchain_community.retrievers.kendra",
+    "AdditionalResultAttributeValue": "langchain_community.retrievers.kendra",
+    "AdditionalResultAttribute": "langchain_community.retrievers.kendra",
+    "DocumentAttributeValue": "langchain_community.retrievers.kendra",
+    "DocumentAttribute": "langchain_community.retrievers.kendra",
+    "ResultItem": "langchain_community.retrievers.kendra",
+    "QueryResultItem": "langchain_community.retrievers.kendra",
+    "RetrieveResultItem": "langchain_community.retrievers.kendra",
+    "QueryResult": "langchain_community.retrievers.kendra",
+    "RetrieveResult": "langchain_community.retrievers.kendra",
+    "AmazonKendraRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
 
 __all__ = [
     "clean_excerpt",
     "combined_text",
-    "DocumentAttributeValueType",
     "Highlight",
     "TextWithHighLights",
     "AdditionalResultAttributeValue",

libs/langchain/langchain/retrievers/knn.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.knn import KNNRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["KNNRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import KNNRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"KNNRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "KNNRetriever",
+]

libs/langchain/langchain/retrievers/llama_index.py

@@ -1,6 +1,30 @@
-from langchain_community.retrievers.llama_index import (
+from typing import TYPE_CHECKING, Any
+
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import (
         LlamaIndexGraphRetriever,
         LlamaIndexRetriever,
-)
+    )
 
-__all__ = ["LlamaIndexRetriever", "LlamaIndexGraphRetriever"]
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "LlamaIndexRetriever": "langchain_community.retrievers",
+    "LlamaIndexGraphRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "LlamaIndexRetriever",
+    "LlamaIndexGraphRetriever",
+]

libs/langchain/langchain/retrievers/metal.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.metal import MetalRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["MetalRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import MetalRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"MetalRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "MetalRetriever",
+]

libs/langchain/langchain/retrievers/milvus.py

@@ -1,3 +1,28 @@
-from langchain_community.retrievers.milvus import MilvusRetreiver, MilvusRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["MilvusRetriever", "MilvusRetreiver"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import MilvusRetriever
+    from langchain_community.retrievers.milvus import MilvusRetreiver
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "MilvusRetriever": "langchain_community.retrievers",
+    "MilvusRetreiver": "langchain_community.retrievers.milvus",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "MilvusRetriever",
+    "MilvusRetreiver",
+]

libs/langchain/langchain/retrievers/outline.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.outline import OutlineRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["OutlineRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import OutlineRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"OutlineRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "OutlineRetriever",
+]

libs/langchain/langchain/retrievers/pinecone_hybrid_search.py

@@ -1,5 +1,23 @@
-from langchain_community.retrievers.pinecone_hybrid_search import (
+from typing import TYPE_CHECKING, Any
-    PineconeHybridSearchRetriever,
-)
 
-__all__ = ["PineconeHybridSearchRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import PineconeHybridSearchRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"PineconeHybridSearchRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "PineconeHybridSearchRetriever",
+]

libs/langchain/langchain/retrievers/pubmed.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.pubmed import PubMedRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["PubMedRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import PubMedRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"PubMedRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "PubMedRetriever",
+]

libs/langchain/langchain/retrievers/pupmed.py

@@ -1,5 +1,24 @@
+from typing import TYPE_CHECKING, Any
+
+from langchain._api import create_importer
 from langchain.retrievers.pubmed import PubMedRetriever
 
+if TYPE_CHECKING:
+    from langchain_community.retrievers import PubMedRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"PubMedRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
 __all__ = [
     "PubMedRetriever",
 ]

libs/langchain/langchain/retrievers/remote_retriever.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.remote_retriever import RemoteLangChainRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["RemoteLangChainRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import RemoteLangChainRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"RemoteLangChainRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "RemoteLangChainRetriever",
+]

libs/langchain/langchain/retrievers/svm.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.svm import SVMRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["SVMRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import SVMRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"SVMRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "SVMRetriever",
+]

libs/langchain/langchain/retrievers/tavily_search_api.py

@@ -1,6 +1,28 @@
-from langchain_community.retrievers.tavily_search_api import (
+from typing import TYPE_CHECKING, Any
-    SearchDepth,
-    TavilySearchAPIRetriever,
-)
 
-__all__ = ["SearchDepth", "TavilySearchAPIRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import TavilySearchAPIRetriever
+    from langchain_community.retrievers.tavily_search_api import SearchDepth
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "SearchDepth": "langchain_community.retrievers.tavily_search_api",
+    "TavilySearchAPIRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "SearchDepth",
+    "TavilySearchAPIRetriever",
+]

libs/langchain/langchain/retrievers/tfidf.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.tfidf import TFIDFRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["TFIDFRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import TFIDFRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"TFIDFRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "TFIDFRetriever",
+]

libs/langchain/langchain/retrievers/vespa_retriever.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.vespa_retriever import VespaRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["VespaRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import VespaRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"VespaRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "VespaRetriever",
+]

libs/langchain/langchain/retrievers/weaviate_hybrid_search.py

@@ -1,5 +1,23 @@
-from langchain_community.retrievers.weaviate_hybrid_search import (
+from typing import TYPE_CHECKING, Any
-    WeaviateHybridSearchRetriever,
-)
 
-__all__ = ["WeaviateHybridSearchRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import WeaviateHybridSearchRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"WeaviateHybridSearchRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "WeaviateHybridSearchRetriever",
+]

libs/langchain/langchain/retrievers/wikipedia.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.wikipedia import WikipediaRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["WikipediaRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import WikipediaRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"WikipediaRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "WikipediaRetriever",
+]

libs/langchain/langchain/retrievers/you.py

@@ -1,3 +1,23 @@
-from langchain_community.retrievers.you import YouRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["YouRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import YouRetriever
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {"YouRetriever": "langchain_community.retrievers"}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "YouRetriever",
+]

libs/langchain/langchain/retrievers/zep.py

@@ -1,3 +1,30 @@
-from langchain_community.retrievers.zep import SearchScope, SearchType, ZepRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["SearchScope", "SearchType", "ZepRetriever"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import ZepRetriever
+    from langchain_community.retrievers.zep import SearchScope, SearchType
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "SearchScope": "langchain_community.retrievers.zep",
+    "SearchType": "langchain_community.retrievers.zep",
+    "ZepRetriever": "langchain_community.retrievers",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "SearchScope",
+    "SearchType",
+    "ZepRetriever",
+]

libs/langchain/langchain/retrievers/zilliz.py

@@ -1,3 +1,28 @@
-from langchain_community.retrievers.zilliz import ZillizRetreiver, ZillizRetriever
+from typing import TYPE_CHECKING, Any
 
-__all__ = ["ZillizRetriever", "ZillizRetreiver"]
+from langchain._api import create_importer
+
+if TYPE_CHECKING:
+    from langchain_community.retrievers import ZillizRetriever
+    from langchain_community.retrievers.zilliz import ZillizRetreiver
+
+# Create a way to dynamically look up deprecated imports.
+# Used to consolidate logic for raising deprecation warnings and
+# handling optional imports.
+DEPRECATED_LOOKUP = {
+    "ZillizRetriever": "langchain_community.retrievers",
+    "ZillizRetreiver": "langchain_community.retrievers.zilliz",
+}
+
+_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
+
+
+def __getattr__(name: str) -> Any:
+    """Look up attributes dynamically."""
+    return _import_attribute(name)
+
+
+__all__ = [
+    "ZillizRetriever",
+    "ZillizRetreiver",
+]

libs/langchain/tests/unit_tests/retrievers/test_imports.py

@@ -8,14 +8,18 @@ EXPECTED_ALL = [
     "ArxivRetriever",
     "AzureAISearchRetriever",
     "AzureCognitiveSearchRetriever",
-    "ChatGPTPluginRetriever",
+    "BM25Retriever",
-    "ContextualCompressionRetriever",
     "ChaindeskRetriever",
+    "ChatGPTPluginRetriever",
     "CohereRagRetriever",
+    "ContextualCompressionRetriever",
+    "DocArrayRetriever",
+    "DriaRetriever",
     "ElasticSearchBM25Retriever",
     "EmbedchainRetriever",
-    "GoogleDocumentAIWarehouseRetriever",
+    "EnsembleRetriever",
     "GoogleCloudEnterpriseSearchRetriever",
+    "GoogleDocumentAIWarehouseRetriever",
     "GoogleVertexAIMultiTurnSearchRetriever",
     "GoogleVertexAISearchRetriever",
     "KayAiRetriever",
@@ -26,27 +30,25 @@ EXPECTED_ALL = [
     "MetalRetriever",
     "MilvusRetriever",
     "MultiQueryRetriever",
+    "MultiVectorRetriever",
+    "NeuralDBRetriever",
     "OutlineRetriever",
+    "ParentDocumentRetriever",
     "PineconeHybridSearchRetriever",
     "PubMedRetriever",
     "RemoteLangChainRetriever",
-    "SVMRetriever",
+    "RePhraseQueryRetriever",
     "SelfQueryRetriever",
+    "SVMRetriever",
     "TavilySearchAPIRetriever",
     "TFIDFRetriever",
-    "BM25Retriever",
     "TimeWeightedVectorStoreRetriever",
     "VespaRetriever",
     "WeaviateHybridSearchRetriever",
+    "WebResearchRetriever",
     "WikipediaRetriever",
     "ZepRetriever",
     "ZillizRetriever",
-    "DocArrayRetriever",
-    "RePhraseQueryRetriever",
-    "WebResearchRetriever",
-    "EnsembleRetriever",
-    "ParentDocumentRetriever",
-    "MultiVectorRetriever",
 ]