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docs: Update v0.2 information (#21796)
Update information about v0.2 upgrade
This commit is contained in:
Eugene Yurtsev
GitHub
parent
3b5ac44e03
commit
fc644c0e1c
@ -1,175 +0,0 @@
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---
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sidebar_position: 1
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sidebar_label: v0.2
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---
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# LangChain v0.2
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LangChain v0.2 was released in May 2024. This release includes a number of breaking changes and deprecations. This document contains a guide on upgrading to 0.2.x, as well as a list of deprecations and breaking changes.
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## Migration
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This documentation will help you upgrade your code to LangChain `0.2.x.`. To prepare for migration, we first recommend you take the following steps:
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1. install the 0.2.x versions of langchain-core, langchain and upgrade to recent versions of other packages that you may be using (e.g. langgraph, langchain-community, langchain-openai, etc.)
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2. Verify that your code runs properly with the new packages (e.g., unit tests pass)
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3. Install a recent version of `langchain-cli` , and use the tool to replace old imports used by your code with the new imports. (See instructions below.)
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4. Manually resolve any remaining deprecation warnings
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5. Re-run unit tests
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### Upgrade to new imports
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We created a tool to help migrate your code. This tool is still in **beta** and may not cover all cases, but
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we hope that it will help you migrate your code more quickly.
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The migration script has the following limitations:
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1. It’s limited to helping users move from old imports to new imports. It doesn’t help address other deprecations.
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2. It can’t handle imports that involve `as` .
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3. New imports are always placed in global scope, even if the old import that was replaced was located inside some local scope (e..g, function body).
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4. It will likely miss some deprecated imports.
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Here is an example of the import changes that the migration script can help apply automatically:
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| From Package | To Package | Deprecated Import | New Import |
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|---------------------|--------------------------|--------------------------------------------------------------------|---------------------------------------------------------------------|
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| langchain | langchain-community | from langchain.vectorstores import InMemoryVectorStore | from langchain_community.vectorstores import InMemoryVectorStore |
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| langchain-community | langchain_openai | from langchain_community.chat_models import ChatOpenAI | from langchain_openai import ChatOpenAI |
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| langchain-community | langchain-core | from langchain_community.document_loaders import Blob | from langchain_core.document_loaders import Blob |
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| langchain | langchain-core | from langchain.schema.document import Document | from langchain_core.documents import Document |
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| langchain | langchain-text-splitters | from langchain.text_splitter import RecursiveCharacterTextSplitter | from langchain_text_splitters import RecursiveCharacterTextSplitter |
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#### Deprecation timeline
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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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2. 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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#### Installation
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```bash
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pip install langchain-cli
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langchain-cli --version # <-- Make sure the version is at least 0.0.22
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```
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#### Usage
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Given that the migration script is not perfect, you should make sure you have a backup of your code first (e.g., using version control like `git`).
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You will need to run the migration script **twice** as it only applies one import replacement per run.
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For example, say your code still uses `from langchain.chat_models import ChatOpenAI`:
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After the first run, you’ll get: `from langchain_community.chat_models import ChatOpenAI`
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After the second run, you’ll get: `from langchain_openai import ChatOpenAI`
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```bash
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# Run a first time
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# Will replace from langchain.chat_models import ChatOpenAI
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langchain-cli migrate [path to code] --diff # Preview
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langchain-cli migrate [path to code] # Apply
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# Run a second time to apply more import replacements
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langchain-cli migrate [path to code] --diff # Preview
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langchain-cli migrate [path to code] # Apply
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```
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#### Other options
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```bash
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# See help menu
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langchain-cli migrate --help
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# Preview Changes without applying
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langchain-cli migrate --diff [path to code]
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# Run on code including ipython notebooks
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# Apply all import updates except for updates from langchain to langchain-core
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langchain-cli migrate --disable langchain_to_core --include-ipynb [path to code]
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```
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## Deprecations and breaking changes
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This code contains a list of deprecations and removals in the `langchain` and `langchain-core` packages.
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### Breaking changes in 0.2.0
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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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|
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### Deprecations
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We have two main types of deprecations:
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|
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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.
|
||||
|
||||
```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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|
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2. 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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894
docs/docs/versions/v_02/deprecations.mdx
Normal file
894
docs/docs/versions/v_02/deprecations.mdx
Normal file
@ -0,0 +1,894 @@
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---
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sidebar_position: 3
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sidebar_label: Changes
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---
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# Deprecations and Breaking Changes
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This code contains a list of deprecations and removals in the `langchain` and `langchain-core` packages.
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New features and improvements are not listed here. See the [overview](/docs/versions/v_02/overview) for a summary of what's new in this release.
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## Breaking changes
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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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|
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The following functions and classes require an explicit LLM to be passed as an argument:
|
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|
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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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|
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|
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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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Behavior was changed for the following code:
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- `@tool` decorator now assigns the function doc-string as the tool description. Previously, the `@tool` decorator
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using to prepend the function signature.
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Before 0.2.0:
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```python
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@tool
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def my_tool(x: str) -> str:
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"""Some description."""
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return "something"
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print(my_tool.description)
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```
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Would result in: `my_tool: (x: str) -> str - Some description.`
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As of 0.2.0:
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It will result in: `Some description.`
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|
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## Code that moved to another package
|
||||
|
||||
Code that was moved from `langchain` into another package (e.g, `langchain-community`)
|
||||
|
||||
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.
|
||||
|
||||
```shell
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python -c "from langchain.document_loaders.markdown import UnstructuredMarkdownLoader"
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```
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|
||||
```shell
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LangChainDeprecationWarning: Importing UnstructuredMarkdownLoader from langchain.document_loaders is deprecated. Please replace deprecated imports:
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|
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>> from langchain.document_loaders import UnstructuredMarkdownLoader
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|
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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.)
|
||||
|
||||
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.
|
||||
|
||||
## Code targeted for removal
|
||||
|
||||
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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|
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### astream events V1
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If you are using `astream_events`, please review how to [migrate to astream events v2](/docs/versions/v_02/migrating_astream_events).
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### langchain_core
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#### try_load_from_hub
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In module: `utils.loading`
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Deprecated: 0.1.30
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Removal: 0.3.0
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Alternative: Using the hwchase17/langchain-hub repo for prompts is deprecated. Please use https://smith.langchain.com/hub instead.
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|
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|
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#### BaseLanguageModel.predict
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|
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In module: `language_models.base`
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Deprecated: 0.1.7
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Removal: 0.3.0
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|
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Alternative: invoke
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|
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|
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#### BaseLanguageModel.predict_messages
|
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|
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|
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In module: `language_models.base`
|
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Deprecated: 0.1.7
|
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Removal: 0.3.0
|
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|
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|
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Alternative: invoke
|
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|
||||
|
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#### BaseLanguageModel.apredict
|
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|
||||
|
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In module: `language_models.base`
|
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Deprecated: 0.1.7
|
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Removal: 0.3.0
|
||||
|
||||
|
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Alternative: ainvoke
|
||||
|
||||
|
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#### BaseLanguageModel.apredict_messages
|
||||
|
||||
|
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In module: `language_models.base`
|
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Deprecated: 0.1.7
|
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Removal: 0.3.0
|
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|
||||
|
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Alternative: ainvoke
|
||||
|
||||
|
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#### RunTypeEnum
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||||
|
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|
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In module: `tracers.schemas`
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Deprecated: 0.1.0
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Removal: 0.3.0
|
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|
||||
|
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Alternative: Use string instead.
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|
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|
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#### TracerSessionV1Base
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|
||||
|
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In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
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||||
|
||||
|
||||
#### TracerSessionV1Create
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||||
|
||||
|
||||
In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### TracerSessionV1
|
||||
|
||||
|
||||
In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### TracerSessionBase
|
||||
|
||||
|
||||
In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### TracerSession
|
||||
|
||||
|
||||
In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### BaseRun
|
||||
|
||||
|
||||
In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: Run
|
||||
|
||||
|
||||
#### LLMRun
|
||||
|
||||
|
||||
In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: Run
|
||||
|
||||
|
||||
#### ChainRun
|
||||
|
||||
|
||||
In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: Run
|
||||
|
||||
|
||||
#### ToolRun
|
||||
|
||||
|
||||
In module: `tracers.schemas`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: Run
|
||||
|
||||
|
||||
#### BaseChatModel.__call__
|
||||
|
||||
|
||||
In module: `language_models.chat_models`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### BaseChatModel.call_as_llm
|
||||
|
||||
|
||||
In module: `language_models.chat_models`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### BaseChatModel.predict
|
||||
|
||||
|
||||
In module: `language_models.chat_models`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### BaseChatModel.predict_messages
|
||||
|
||||
|
||||
In module: `language_models.chat_models`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### BaseChatModel.apredict
|
||||
|
||||
|
||||
In module: `language_models.chat_models`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: ainvoke
|
||||
|
||||
|
||||
#### BaseChatModel.apredict_messages
|
||||
|
||||
|
||||
In module: `language_models.chat_models`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: ainvoke
|
||||
|
||||
|
||||
#### BaseLLM.__call__
|
||||
|
||||
|
||||
In module: `language_models.llms`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### BaseLLM.predict
|
||||
|
||||
|
||||
In module: `language_models.llms`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### BaseLLM.predict_messages
|
||||
|
||||
|
||||
In module: `language_models.llms`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### BaseLLM.apredict
|
||||
|
||||
|
||||
In module: `language_models.llms`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: ainvoke
|
||||
|
||||
|
||||
#### BaseLLM.apredict_messages
|
||||
|
||||
|
||||
In module: `language_models.llms`
|
||||
Deprecated: 0.1.7
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: ainvoke
|
||||
|
||||
|
||||
#### BaseRetriever.get_relevant_documents
|
||||
|
||||
|
||||
In module: `retrievers`
|
||||
Deprecated: 0.1.46
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### BaseRetriever.aget_relevant_documents
|
||||
|
||||
|
||||
In module: `retrievers`
|
||||
Deprecated: 0.1.46
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: ainvoke
|
||||
|
||||
|
||||
#### ChatPromptTemplate.from_role_strings
|
||||
|
||||
|
||||
In module: `prompts.chat`
|
||||
Deprecated: 0.0.1
|
||||
Removal:
|
||||
|
||||
|
||||
Alternative: from_messages classmethod
|
||||
|
||||
|
||||
#### ChatPromptTemplate.from_strings
|
||||
|
||||
|
||||
In module: `prompts.chat`
|
||||
Deprecated: 0.0.1
|
||||
Removal:
|
||||
|
||||
|
||||
Alternative: from_messages classmethod
|
||||
|
||||
|
||||
#### BaseTool.__call__
|
||||
|
||||
|
||||
In module: `tools`
|
||||
Deprecated: 0.1.47
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### convert_pydantic_to_openai_function
|
||||
|
||||
|
||||
In module: `utils.function_calling`
|
||||
Deprecated: 0.1.16
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: langchain_core.utils.function_calling.convert_to_openai_function()
|
||||
|
||||
|
||||
#### convert_pydantic_to_openai_tool
|
||||
|
||||
|
||||
In module: `utils.function_calling`
|
||||
Deprecated: 0.1.16
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: langchain_core.utils.function_calling.convert_to_openai_tool()
|
||||
|
||||
|
||||
#### convert_python_function_to_openai_function
|
||||
|
||||
|
||||
In module: `utils.function_calling`
|
||||
Deprecated: 0.1.16
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: langchain_core.utils.function_calling.convert_to_openai_function()
|
||||
|
||||
|
||||
#### format_tool_to_openai_function
|
||||
|
||||
|
||||
In module: `utils.function_calling`
|
||||
Deprecated: 0.1.16
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: langchain_core.utils.function_calling.convert_to_openai_function()
|
||||
|
||||
|
||||
#### format_tool_to_openai_tool
|
||||
|
||||
|
||||
In module: `utils.function_calling`
|
||||
Deprecated: 0.1.16
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: langchain_core.utils.function_calling.convert_to_openai_tool()
|
||||
|
||||
|
||||
## langchain
|
||||
|
||||
|
||||
#### AgentType
|
||||
|
||||
|
||||
In module: `agents.agent_types`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: Use new agent constructor methods like create_react_agent, create_json_agent, create_structured_chat_agent, etc.
|
||||
|
||||
|
||||
#### Chain.__call__
|
||||
|
||||
|
||||
In module: `chains.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### Chain.acall
|
||||
|
||||
|
||||
In module: `chains.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: ainvoke
|
||||
|
||||
|
||||
#### Chain.run
|
||||
|
||||
|
||||
In module: `chains.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: invoke
|
||||
|
||||
|
||||
#### Chain.arun
|
||||
|
||||
|
||||
In module: `chains.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: ainvoke
|
||||
|
||||
|
||||
#### Chain.apply
|
||||
|
||||
|
||||
In module: `chains.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: batch
|
||||
|
||||
|
||||
#### LLMChain
|
||||
|
||||
|
||||
In module: `chains.llm`
|
||||
Deprecated: 0.1.17
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: RunnableSequence, e.g., `prompt | llm`
|
||||
|
||||
|
||||
#### LLMSingleActionAgent
|
||||
|
||||
|
||||
In module: `agents.agent`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: Use new agent constructor methods like create_react_agent, create_json_agent, create_structured_chat_agent, etc.
|
||||
|
||||
|
||||
#### Agent
|
||||
|
||||
|
||||
In module: `agents.agent`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: Use new agent constructor methods like create_react_agent, create_json_agent, create_structured_chat_agent, etc.
|
||||
|
||||
|
||||
#### OpenAIFunctionsAgent
|
||||
|
||||
|
||||
In module: `agents.openai_functions_agent.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_openai_functions_agent
|
||||
|
||||
|
||||
#### ZeroShotAgent
|
||||
|
||||
|
||||
In module: `agents.mrkl.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_react_agent
|
||||
|
||||
|
||||
#### MRKLChain
|
||||
|
||||
|
||||
In module: `agents.mrkl.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### ConversationalAgent
|
||||
|
||||
|
||||
In module: `agents.conversational.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_react_agent
|
||||
|
||||
|
||||
#### ConversationalChatAgent
|
||||
|
||||
|
||||
In module: `agents.conversational_chat.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_json_chat_agent
|
||||
|
||||
|
||||
#### ChatAgent
|
||||
|
||||
|
||||
In module: `agents.chat.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_react_agent
|
||||
|
||||
|
||||
#### OpenAIMultiFunctionsAgent
|
||||
|
||||
|
||||
In module: `agents.openai_functions_multi_agent.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_openai_tools_agent
|
||||
|
||||
|
||||
#### ReActDocstoreAgent
|
||||
|
||||
|
||||
In module: `agents.react.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### DocstoreExplorer
|
||||
|
||||
|
||||
In module: `agents.react.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### ReActTextWorldAgent
|
||||
|
||||
|
||||
In module: `agents.react.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### ReActChain
|
||||
|
||||
|
||||
In module: `agents.react.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### SelfAskWithSearchAgent
|
||||
|
||||
|
||||
In module: `agents.self_ask_with_search.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_self_ask_with_search
|
||||
|
||||
|
||||
#### SelfAskWithSearchChain
|
||||
|
||||
|
||||
In module: `agents.self_ask_with_search.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### StructuredChatAgent
|
||||
|
||||
|
||||
In module: `agents.structured_chat.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_structured_chat_agent
|
||||
|
||||
|
||||
#### RetrievalQA
|
||||
|
||||
|
||||
In module: `chains.retrieval_qa.base`
|
||||
Deprecated: 0.1.17
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_retrieval_chain
|
||||
|
||||
|
||||
#### load_agent_from_config
|
||||
|
||||
|
||||
In module: `agents.loading`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### load_agent
|
||||
|
||||
|
||||
In module: `agents.loading`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative:
|
||||
|
||||
|
||||
#### initialize_agent
|
||||
|
||||
|
||||
In module: `agents.initialize`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: Use new agent constructor methods like create_react_agent, create_json_agent, create_structured_chat_agent, etc.
|
||||
|
||||
|
||||
#### XMLAgent
|
||||
|
||||
|
||||
In module: `agents.xml.base`
|
||||
Deprecated: 0.1.0
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_xml_agent
|
||||
|
||||
|
||||
#### CohereRerank
|
||||
|
||||
|
||||
In module: `retrievers.document_compressors.cohere_rerank`
|
||||
Deprecated: 0.0.30
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: langchain_cohere.CohereRerank
|
||||
|
||||
|
||||
#### ConversationalRetrievalChain
|
||||
|
||||
|
||||
In module: `chains.conversational_retrieval.base`
|
||||
Deprecated: 0.1.17
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_history_aware_retriever together with create_retrieval_chain (see example in docstring)
|
||||
|
||||
|
||||
#### create_extraction_chain_pydantic
|
||||
|
||||
|
||||
In module: `chains.openai_tools.extraction`
|
||||
Deprecated: 0.1.14
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: with_structured_output method on chat models that support tool calling.
|
||||
|
||||
|
||||
#### create_openai_fn_runnable
|
||||
|
||||
|
||||
In module: `chains.structured_output.base`
|
||||
Deprecated: 0.1.14
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: with_structured_output method on chat models that support tool calling.
|
||||
|
||||
|
||||
#### create_structured_output_runnable
|
||||
|
||||
|
||||
In module: `chains.structured_output.base`
|
||||
Deprecated: 0.1.17
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: with_structured_output method on chat models that support tool calling.
|
||||
|
||||
|
||||
#### create_openai_fn_chain
|
||||
|
||||
|
||||
In module: `chains.openai_functions.base`
|
||||
Deprecated: 0.1.1
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: create_openai_fn_runnable
|
||||
|
||||
|
||||
#### create_structured_output_chain
|
||||
|
||||
|
||||
In module: `chains.openai_functions.base`
|
||||
Deprecated: 0.1.1
|
||||
Removal: 0.3.0
|
||||
|
||||
Alternative: ChatOpenAI.with_structured_output
|
||||
|
||||
|
||||
#### create_extraction_chain
|
||||
|
||||
|
||||
In module: `chains.openai_functions.extraction`
|
||||
Deprecated: 0.1.14
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: with_structured_output method on chat models that support tool calling.
|
||||
|
||||
|
||||
#### create_extraction_chain_pydantic
|
||||
|
||||
|
||||
In module: `chains.openai_functions.extraction`
|
||||
Deprecated: 0.1.14
|
||||
Removal: 0.3.0
|
||||
|
||||
|
||||
Alternative: with_structured_output method on chat models that support tool calling.
|
||||
118
docs/docs/versions/v_02/migrating_astream_events.mdx
Normal file
118
docs/docs/versions/v_02/migrating_astream_events.mdx
Normal file
@ -0,0 +1,118 @@
|
||||
---
|
||||
sidebar_position: 2
|
||||
sidebar_label: astream_events v2
|
||||
---
|
||||
|
||||
# Migrating to Astream Events v2
|
||||
|
||||
We've added a `v2` of the astream_events API with the release of `0.2.0`. You can see this [PR](https://github.com/langchain-ai/langchain/pull/21638) for more details.
|
||||
|
||||
The `v2` version is a re-write of the `v1` version, and should be more efficient, with more consistent output for the events. The `v1` version of the API will be deprecated in favor of the `v2` version and will be removed in `0.4.0`.
|
||||
|
||||
Below is a list of changes between the `v1` and `v2` versions of the API.
|
||||
|
||||
|
||||
### output for `on_chat_model_end`
|
||||
|
||||
In `v1`, the outputs associated with `on_chat_model_end` changed depending on whether the
|
||||
chat model was run as a root level runnable or as part of a chain.
|
||||
|
||||
As a root level runnable the output was:
|
||||
|
||||
```python
|
||||
"data": {"output": AIMessageChunk(content="hello world!", id='some id')}
|
||||
```
|
||||
|
||||
As part of a chain the output was:
|
||||
|
||||
```
|
||||
"data": {
|
||||
"output": {
|
||||
"generations": [
|
||||
[
|
||||
{
|
||||
"generation_info": None,
|
||||
"message": AIMessageChunk(
|
||||
content="hello world!", id=AnyStr()
|
||||
),
|
||||
"text": "hello world!",
|
||||
"type": "ChatGenerationChunk",
|
||||
}
|
||||
]
|
||||
],
|
||||
"llm_output": None,
|
||||
}
|
||||
},
|
||||
```
|
||||
|
||||
|
||||
As of `v2`, the output will always be the simpler representation:
|
||||
|
||||
```python
|
||||
"data": {"output": AIMessageChunk(content="hello world!", id='some id')}
|
||||
```
|
||||
|
||||
:::note
|
||||
Non chat models (i.e., regular LLMs) are will be consistently associated with the more verbose format for now.
|
||||
:::
|
||||
|
||||
### output for `on_retriever_end`
|
||||
|
||||
`on_retriever_end` output will always return a list of `Documents`.
|
||||
|
||||
Before:
|
||||
```python
|
||||
{
|
||||
"data": {
|
||||
"output": [
|
||||
Document(...),
|
||||
Document(...),
|
||||
...
|
||||
]
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
### Removed `on_retriever_stream`
|
||||
|
||||
The `on_retriever_stream` event was an artifact of the implementation and has been removed.
|
||||
|
||||
Full information associated with the event is already available in the `on_retriever_end` event.
|
||||
|
||||
Please use `on_retriever_end` instead.
|
||||
|
||||
### Removed `on_tool_stream`
|
||||
|
||||
The `on_tool_stream` event was an artifact of the implementation and has been removed.
|
||||
|
||||
Full information associated with the event is already available in the `on_tool_end` event.
|
||||
|
||||
Please use `on_tool_end` instead.
|
||||
|
||||
### Propagating Names
|
||||
|
||||
Names of runnables have been updated to be more consistent.
|
||||
|
||||
```python
|
||||
model = GenericFakeChatModel(messages=infinite_cycle).configurable_fields(
|
||||
messages=ConfigurableField(
|
||||
id="messages",
|
||||
name="Messages",
|
||||
description="Messages return by the LLM",
|
||||
)
|
||||
)
|
||||
```
|
||||
|
||||
In `v1`, the event name was `RunnableConfigurableFields`.
|
||||
|
||||
In `v2`, the event name is `GenericFakeChatModel`.
|
||||
|
||||
If you're filtering by event names, check if you need to update your filters.
|
||||
|
||||
### RunnableRetry
|
||||
|
||||
Usage of [RunnableRetry](https://api.python.langchain.com/en/latest/runnables/langchain_core.runnables.retry.RunnableRetry.html)
|
||||
within an LCEL chain being streamed generated an incorrect `on_chain_end` event in `v1` corresponding
|
||||
to the failed runnable invocation that was being retried. This event has been removed in `v2`.
|
||||
|
||||
No action is required for this change.
|
||||
82
docs/docs/versions/v_02/migration.mdx
Normal file
82
docs/docs/versions/v_02/migration.mdx
Normal file
@ -0,0 +1,82 @@
|
||||
---
|
||||
sidebar_position: 1
|
||||
sidebar_label: Migration
|
||||
---
|
||||
|
||||
# Migration
|
||||
|
||||
LangChain v0.2 was released in May 2024. This release includes a number of [breaking changes and deprecations](/docs/versions/v_02/deprecations). This document contains a guide on upgrading to 0.2.x.
|
||||
|
||||
This documentation will help you upgrade your code to LangChain `0.2.x.`. To prepare for migration, we first recommend you take the following steps:
|
||||
|
||||
1. Install the 0.2.x versions of langchain-core, langchain and upgrade to recent versions of other packages that you may be using. (e.g. langgraph, langchain-community, langchain-openai, etc.)
|
||||
2. Verify that your code runs properly with the new packages (e.g., unit tests pass).
|
||||
3. Install a recent version of `langchain-cli` , and use the tool to replace old imports used by your code with the new imports. (See instructions below.)
|
||||
4. Manually resolve any remaining deprecation warnings.
|
||||
5. Re-run unit tests.
|
||||
6. If you are using `astream_events`, please review how to [migrate to astream events v2](/docs/versions/v_02/migrating_astream_events).
|
||||
|
||||
## Upgrade to new imports
|
||||
|
||||
We created a tool to help migrate your code. This tool is still in **beta** and may not cover all cases, but
|
||||
we hope that it will help you migrate your code more quickly.
|
||||
|
||||
The migration script has the following limitations:
|
||||
|
||||
1. It’s limited to helping users move from old imports to new imports. It does not help address other deprecations.
|
||||
2. It can’t handle imports that involve `as` .
|
||||
3. New imports are always placed in global scope, even if the old import that was replaced was located inside some local scope (e..g, function body).
|
||||
4. It will likely miss some deprecated imports.
|
||||
|
||||
Here is an example of the import changes that the migration script can help apply automatically:
|
||||
|
||||
|
||||
| From Package | To Package | Deprecated Import | New Import |
|
||||
|---------------------|--------------------------|--------------------------------------------------------------------|---------------------------------------------------------------------|
|
||||
| langchain | langchain-community | from langchain.vectorstores import InMemoryVectorStore | from langchain_community.vectorstores import InMemoryVectorStore |
|
||||
| langchain-community | langchain_openai | from langchain_community.chat_models import ChatOpenAI | from langchain_openai import ChatOpenAI |
|
||||
| langchain-community | langchain-core | from langchain_community.document_loaders import Blob | from langchain_core.document_loaders import Blob |
|
||||
| langchain | langchain-core | from langchain.schema.document import Document | from langchain_core.documents import Document |
|
||||
| langchain | langchain-text-splitters | from langchain.text_splitter import RecursiveCharacterTextSplitter | from langchain_text_splitters import RecursiveCharacterTextSplitter |
|
||||
|
||||
|
||||
## Installation
|
||||
|
||||
```bash
|
||||
pip install langchain-cli
|
||||
langchain-cli --version # <-- Make sure the version is at least 0.0.22
|
||||
```
|
||||
|
||||
## Usage
|
||||
|
||||
Given that the migration script is not perfect, you should make sure you have a backup of your code first (e.g., using version control like `git`).
|
||||
|
||||
You will need to run the migration script **twice** as it only applies one import replacement per run.
|
||||
|
||||
For example, say your code still uses `from langchain.chat_models import ChatOpenAI`:
|
||||
|
||||
After the first run, you’ll get: `from langchain_community.chat_models import ChatOpenAI`
|
||||
After the second run, you’ll get: `from langchain_openai import ChatOpenAI`
|
||||
|
||||
```bash
|
||||
# Run a first time
|
||||
# Will replace from langchain.chat_models import ChatOpenAI
|
||||
langchain-cli migrate [path to code] --diff # Preview
|
||||
langchain-cli migrate [path to code] # Apply
|
||||
|
||||
# Run a second time to apply more import replacements
|
||||
langchain-cli migrate [path to code] --diff # Preview
|
||||
langchain-cli migrate [path to code] # Apply
|
||||
```
|
||||
|
||||
### Other options
|
||||
|
||||
```bash
|
||||
# See help menu
|
||||
langchain-cli migrate --help
|
||||
# Preview Changes without applying
|
||||
langchain-cli migrate --diff [path to code]
|
||||
# Run on code including ipython notebooks
|
||||
# Apply all import updates except for updates from langchain to langchain-core
|
||||
langchain-cli migrate --disable langchain_to_core --include-ipynb [path to code]
|
||||
```
|
||||
@ -9,7 +9,7 @@ sidebar_label: Overview
|
||||
|
||||
The following features have been added during the development of 0.1.x:
|
||||
|
||||
- Better streaming support via the [Event Streaming API](https://python.langchain.com/docs/expression_language/streaming/#using-stream-events)
|
||||
- Better streaming support via the [Event Streaming API](https://python.langchain.com/docs/expression_language/streaming/#using-stream-events).
|
||||
- [Standardized tool calling support](https://blog.langchain.dev/tool-calling-with-langchain/)
|
||||
- A standardized interface for [structuring output](https://github.com/langchain-ai/langchain/discussions/18154)
|
||||
- [@chain decorator](https://python.langchain.com/docs/expression_language/how_to/decorator/) to more easily create **RunnableLambdas**
|
||||
@ -20,6 +20,7 @@ The following features have been added during the development of 0.1.x:
|
||||
- Interoperability of chat message histories across most providers
|
||||
- [Over 20+ partner packages in python](https://python.langchain.com/docs/integrations/platforms/) for popular integrations
|
||||
|
||||
|
||||
## What’s coming to LangChain?
|
||||
|
||||
- We’ve been working hard on [langgraph](https://python.langchain.com/docs/langgraph/). We will be building more capabilities on top of it and focusing on making it the go-to framework for agent architectures.
|
||||
@ -69,13 +69,21 @@ module.exports = {
|
||||
collapsed: false,
|
||||
collapsible: false,
|
||||
items: [
|
||||
"versions/release_policy",
|
||||
"versions/packages",
|
||||
{
|
||||
type: "autogenerated",
|
||||
dirName: "versions",
|
||||
type: "category",
|
||||
label: "v0.2",
|
||||
items: [
|
||||
{
|
||||
type: "autogenerated",
|
||||
dirName: "versions/v_02",
|
||||
}
|
||||
]
|
||||
}
|
||||
],
|
||||
},
|
||||
"security",
|
||||
"security"
|
||||
],
|
||||
integrations: [
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user