def from_langchain()

in src/smolagents/tools.py [0:0]

• 22 lines of code
• 5 McCabe index (conditional complexity)

    def from_langchain(langchain_tool):
        """
        Creates a [`Tool`] from a langchain tool.
        """

        class LangChainToolWrapper(Tool):
            skip_forward_signature_validation = True

            def __init__(self, _langchain_tool):
                self.name = _langchain_tool.name.lower()
                self.description = _langchain_tool.description
                self.inputs = _langchain_tool.args.copy()
                for input_content in self.inputs.values():
                    if "title" in input_content:
                        input_content.pop("title")
                    input_content["description"] = ""
                self.output_type = "string"
                self.langchain_tool = _langchain_tool
                self.is_initialized = True

            def forward(self, *args, **kwargs):
                tool_input = kwargs.copy()
                for index, argument in enumerate(args):
                    if index < len(self.inputs):
                        input_key = next(iter(self.inputs))
                        tool_input[input_key] = argument
                return self.langchain_tool.run(tool_input)

        return LangChainToolWrapper(langchain_tool)