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93 lines
5.5 KiB
Plaintext
93 lines
5.5 KiB
Plaintext
# langchain
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## 0.2.0
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### Deleted
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As of release 0.2.0, `langchain` is required to be integration-agnostic. This means that code in `langchain` should not by default instantiate any specific chat models, llms, embedding models, vectorstores etc; instead, the user will be required to specify those explicitly.
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The following functions and classes require an explicit LLM to be passed as an argument:
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- `langchain.agents.agent_toolkits.vectorstore.toolkit.VectorStoreToolkit`
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- `langchain.agents.agent_toolkits.vectorstore.toolkit.VectorStoreRouterToolkit`
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- `langchain.chains.openai_functions.get_openapi_chain`
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- `langchain.chains.router.MultiRetrievalQAChain.from_retrievers`
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- `langchain.indexes.VectorStoreIndexWrapper.query`
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- `langchain.indexes.VectorStoreIndexWrapper.query_with_sources`
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- `langchain.indexes.VectorStoreIndexWrapper.aquery_with_sources`
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- `langchain.chains.flare.FlareChain`
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The following classes now require passing an explicit Embedding model as an argument:
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- `langchain.indexes.VectostoreIndexCreator`
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The following code has been removed:
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- `langchain.natbot.NatBotChain.from_default` removed in favor of the `from_llm` class method.
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### Deprecated
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We have two main types of deprecations:
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1. Code that was moved from `langchain` into another package (e.g, `langchain-community`)
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If you try to import it from `langchain`, the import will keep on working, but will raise a deprecation warning. The warning will provide a replacement import statement.
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```python
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python -c "from langchain.document_loaders.markdown import UnstructuredMarkdownLoader"
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```
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```python
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LangChainDeprecationWarning: Importing UnstructuredMarkdownLoader from langchain.document_loaders is deprecated. Please replace deprecated imports:
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>> from langchain.document_loaders import UnstructuredMarkdownLoader
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with new imports of:
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>> from langchain_community.document_loaders import UnstructuredMarkdownLoader
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```
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We will continue supporting the imports in `langchain` until release 0.4 as long as the relevant package where the code lives is installed. (e.g., as long as `langchain_community` is installed.)
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However, we advise for users to not rely on these imports and instead migrate to the new imports. To help with this process, we’re releasing a migration script via the LangChain CLI. See further instructions in migration guide.
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1. Code that has better alternatives available and will eventually be removed, so there’s only a single way to do things. (e.g., `predict_messages` method in ChatModels has been deprecated in favor of `invoke`).
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Many of these were marked for removal in 0.2. We have bumped the removal to 0.3.
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## 0.1.0 (Jan 5, 2024)
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### Deleted
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No deletions.
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### Deprecated
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Deprecated classes and methods will be removed in 0.2.0
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| Deprecated | Alternative | Reason |
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|---------------------------------|-----------------------------------|------------------------------------------------|
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| ChatVectorDBChain | ConversationalRetrievalChain | More general to all retrievers |
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| create_ernie_fn_chain | create_ernie_fn_runnable | Use LCEL under the hood |
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| created_structured_output_chain | create_structured_output_runnable | Use LCEL under the hood |
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| NatBotChain | | Not used |
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| create_openai_fn_chain | create_openai_fn_runnable | Use LCEL under the hood |
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| create_structured_output_chain | create_structured_output_runnable | Use LCEL under the hood |
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| load_query_constructor_chain | load_query_constructor_runnable | Use LCEL under the hood |
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| VectorDBQA | RetrievalQA | More general to all retrievers |
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| Sequential Chain | LCEL | Obviated by LCEL |
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| SimpleSequentialChain | LCEL | Obviated by LCEL |
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| TransformChain | LCEL/RunnableLambda | Obviated by LCEL |
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| create_tagging_chain | create_structured_output_runnable | Use LCEL under the hood |
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| ChatAgent | create_react_agent | Use LCEL builder over a class |
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| ConversationalAgent | create_react_agent | Use LCEL builder over a class |
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| ConversationalChatAgent | create_json_chat_agent | Use LCEL builder over a class |
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| initialize_agent | Individual create agent methods | Individual create agent methods are more clear |
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| ZeroShotAgent | create_react_agent | Use LCEL builder over a class |
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| OpenAIFunctionsAgent | create_openai_functions_agent | Use LCEL builder over a class |
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| OpenAIMultiFunctionsAgent | create_openai_tools_agent | Use LCEL builder over a class |
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| SelfAskWithSearchAgent | create_self_ask_with_search | Use LCEL builder over a class |
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| StructuredChatAgent | create_structured_chat_agent | Use LCEL builder over a class |
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| XMLAgent | create_xml_agent | Use LCEL builder over a class | |