mirror of
https://github.com/hwchase17/langchain
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71 lines
1.8 KiB
Markdown
71 lines
1.8 KiB
Markdown
# Migrating
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## 🚨Breaking Changes for select chains (SQLDatabase) on 7/28/23
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In an effort to make `langchain` leaner and safer, we are moving select chains to `langchain_experimental`.
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This migration has already started, but we are remaining backwards compatible until 7/28.
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On that date, we will remove functionality from `langchain`.
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Read more about the motivation and the progress [here](https://github.com/langchain-ai/langchain/discussions/8043).
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### Migrating to `langchain_experimental`
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We are moving any experimental components of LangChain, or components with vulnerability issues, into `langchain_experimental`.
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This guide covers how to migrate.
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### Installation
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Previously:
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`pip install -U langchain`
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Now (only if you want to access things in experimental):
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`pip install -U langchain langchain_experimental`
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### Things in `langchain.experimental`
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Previously:
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`from langchain.experimental import ...`
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Now:
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`from langchain_experimental import ...`
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### PALChain
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Previously:
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`from langchain.chains import PALChain`
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Now:
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`from langchain_experimental.pal_chain import PALChain`
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### SQLDatabaseChain
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Previously:
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`from langchain.chains import SQLDatabaseChain`
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Now:
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`from langchain_experimental.sql import SQLDatabaseChain`
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Alternatively, if you are just interested in using the query generation part of the SQL chain, you can check out [`create_sql_query_chain`](https://github.com/langchain-ai/langchain/blob/master/docs/extras/use_cases/tabular/sql_query.ipynb)
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`from langchain.chains import create_sql_query_chain`
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### `load_prompt` for Python files
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Note: this only applies if you want to load Python files as prompts.
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If you want to load json/yaml files, no change is needed.
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Previously:
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`from langchain.prompts import load_prompt`
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Now:
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`from langchain_experimental.prompts import load_prompt`
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