langgraph-utils 0.0.3

Utilities for Langchain and langgraph

LangChain Tools JSON Converter

This module provides utility functions to convert LangChain tool objects into JSON format and vice versa. It helps serialize and deserialize structured tool definitions for easier storage and transport.

Features

• create_tools_json: Converts a list of LangChain tool objects into a JSON string.
• json_to_structured_tools: Converts a JSON representation of LangChain tools back into StructuredTool objects.

Installation

Ensure you have langchain_core installed before using this module:

pip install langchain-core

Usage

Converting Tools to JSON

from langchain_core.tools import StructuredTool

# Example tool
example_tool = StructuredTool(
    name="example_tool",
    description="An example tool",
    func=None,
    args_schema={}
)

# Convert to JSON
json_output = create_tools_json([example_tool])
print(json_output)

Converting JSON to Structured Tools

json_tools = [
    {
        "name": "example_tool",
        "description": "An example tool",
        "args_schema": {}
    }
]

structured_tools = json_to_structured_tools(json_tools)
print(structured_tools)

Function Details

create_tools_json(tools)

Description: Converts a list of LangChain tool objects into a JSON string.

Parameters:

• tools (List of StructuredTool objects): List of tool objects to be serialized.

Returns:

• str: JSON string representation of the tools.

json_to_structured_tools(json_tools)

Description: Converts JSON-formatted LangChain tools into StructuredTool objects.

Parameters:

• json_tools (list or dict): A list or single JSON object representing tools.

Returns:

• StructuredTool or List of StructuredTool objects.

Notes

• The func attribute is set to None when reconstructing StructuredTool objects from JSON.
• Ensure that the args_schema matches the expected schema format for LangChain.

License

This module is open-source and can be modified as needed.