LangChain Core Library

1.2.23 · active · verified Sat Mar 28

LangChain Core is a Python library designed to facilitate the development of applications using Large Language Models (LLMs) through composability. The current version is 1.2.23, and it follows a regular release cadence with frequent updates and improvements.

Warnings

breaking Deprecation of Pydantic 1.x support
Fix: Upgrade to Pydantic 2.x to maintain compatibility.
gotcha Import paths have changed in recent versions
Fix: Update import statements to reflect the new module structure.

Install

pip install langchain-core Install LangChain Core

Imports

SomeClass
```
from langchain_core import SomeClass
```
Ensure correct import path to avoid deprecation warnings

Quickstart

A basic example demonstrating how to initialize and use a class from langchain_core.

import os
from langchain_core import SomeClass

# Initialize the class with necessary parameters
some_instance = SomeClass(param1=os.environ.get('PARAM1'), param2=os.environ.get('PARAM2'))

# Use the instance to perform tasks
result = some_instance.perform_task()
print(result)

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