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docs: replace initialize_agent with create_react_agent #29403

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docs: replace initialize_agent with create_react_agent #29403

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Description

This PR replaces all instances of the deprecated initialize_agent function with the newer langgraph.prebuilt.create_react_agent across the LangChain documentation. The updates were made to ensure consistency with the latest library usage and to improve the user experience.

Issue

Closes #29277

Dependencies

None.

Twitter handle

I don't use twitter, but I'm active on GitHub!

Additional Notes

  • All changes were made in the docs/ directory, including .mdx and .ipynb files.
  • Code snippets were updated, imports replaced, and corresponding descriptions adjusted for clarity.
  • Linting and formatting have been applied to the modified files.

Checklist

  • Ran make format and make lint.
  • Verified changes by building and previewing the documentation locally.
  • No new dependencies added.
  • Changes are backwards compatible.

@turboslapper
Replace initialize_agent with create_react_agent for LangGraph co…
e90ea8a 
…mpatibility

- Updated code to use `create_react_agent` instead of the deprecated `initialize_agent`.
- Removed explicit `AgentType` parameters as they are implicitly supported by `create_react_agent`.
- Replaced `verbose=True` with `debug=True` for detailed logging.

Partially addresses langchain-ai#29277
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Added more updates
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Completed page 2 of 3
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@dosubot dosubot bot added size:L This PR changes 100-499 lines, ignoring generated files. 🤖:docs Changes to documentation and examples, like .md, .rst, .ipynb files. Changes to the docs/ folder labels Jan 24, 2025
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I want to highlight a potential issue with the command poetry install --with lint,docs --no-root, as it returned the following error for me: Group(s) not found: docs (via --with).

Upon further investigation, I noticed that the pyproject.toml file did not include any references to a docs group for Poetry. This appears to contradict the initial instructions provided in this link: LangChain Documentation Setup Guide.

To ensure this wasn't an error on my end, I confirmed I was in the monorepo and even tried running the command on a fresh clone of LangChain without making any changes, but the issue persisted.

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Hi @efriis!

I've completed updating all references to initialize_agent with create_react_agent in the documentation as per #29277. All affected examples in the docs/ directory have been updated, and I resolved any formatting/linting issues as well.

Let me know if there's anything else you'd like me to adjust or improve!

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🤖:docs Changes to documentation and examples, like .md, .rst, .ipynb files. Changes to the docs/ folder size:L This PR changes 100-499 lines, ignoring generated files.
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docs: Replace initialize_agent use with langgraph.prebuilt.create_react_agent
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