---
title: "Agentic AI with LangChain — Part 4: ReAct Pattern in LangGraph"
url: https://daily.dev/posts/agentic-ai-with-langchain-part-4-react-pattern-in-langgraph-iaseqb5th
source_url: https://levelup.gitconnected.com/agentic-ai-with-langchain-part-4-react-pattern-in-langgraph-ad6fb83fb33e
type: article
source: "gitconnected"
published: 2026-07-23T15:40:09.341Z
updated: 2026-07-23T16:54:45.701Z
tags: ["python", "ai-agents", "langchain", "langgraph"]
reading_time: 7
upvotes: 1
comments: 0
language: en
---

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# Agentic AI with LangChain — Part 4: ReAct Pattern in LangGraph

**[gitconnected](https://daily.dev/sources/gc)** · 7 min read · 1 upvotes · 0 comments

## Summary

Part 4 of an Agentic AI series covering the ReAct (Reasoning + Acting) pattern for building multi-step AI agents. Explains the ReAct cycle conceptually, implements a vanilla ReAct loop in Python using asyncio for parallel tool execution, then shows how LangGraph simplifies the pattern using ToolNode, StateGraph, tools_condition conditional edges, and typed state management. Includes complete code for a weather assistant that chains tool calls to answer multi-step queries.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://levelup.gitconnected.com/agentic-ai-with-langchain-part-4-react-pattern-in-langgraph-ad6fb83fb33e>

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---

Tags: [#python](https://daily.dev/tags/python), [#ai-agents](https://daily.dev/tags/ai-agents), [#langchain](https://daily.dev/tags/langchain), [#langgraph](https://daily.dev/tags/langgraph)

[View this post on daily.dev](https://daily.dev/posts/agentic-ai-with-langchain-part-4-react-pattern-in-langgraph-iaseqb5th)