How can i pass parameters from one node to another?

[shahzain110]

I am trying to build a coding assistant, which will have tools "Manager" , "Coder" , "Senior Coder/Reviewer", "Tester", "Compiler"

I am having difficult is passing "manager" gathered requirements to "coder" and "coder" code to "Senior Coder/Reviewer"

these are my tools and state.

`

Define your desired data structure.

class CodeGeneration(BaseModel):
code: str = Field(description="Only the code function code")
code_description: str = Field(description="description of code if any else None")

@tool
def get_code(config: RunnableConfig) -> dict:
"""this function will take requirements and generate code"""

print(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> in get_code >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")
# print(function_description, programming_language)
configuration = config.get("configurable", {})
function_description = configuration.get("function_description")
programming_language = configuration.get("programming_language")
input_params = configuration.get("input_params")
output_results = configuration.get("output_results")

pydantic_parser = PydanticOutputParser(pydantic_object=CodeGeneration)

format_instructions = pydantic_parser.get_format_instructions()

prompt = ChatPromptTemplate.from_messages(
    [
        (
            "system",
            "You are a '{programming_language}' developer. Just write only function according to the given requierments in Programming Language {programming_language}. Don't write code in Markdown format \n \n{format_instructions}",
        ),
        ("human", "These are the requirements : \n \n {requirements}"),
    ]
)

chain = prompt | llm
result = chain.invoke(
    {
        "requirements": function_description,
        "programming_language": programming_language,
        "format_instructions": format_instructions,
    }
)

the_brand = pydantic_parser.parse(result.content)

print("get_code : \n", the_brand.code)

return {
    "code": the_brand.code,
    "code_description": the_brand.code_description,
    "programming_language": programming_language,
    "messages": [
        HumanMessage(content=the_brand.code)
    ],
}

@tool
def get_requirements(config: RunnableConfig) -> dict:
"""Gather the requirements for a function based on user-provided information."""
print(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> in get_requirements >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>")

# Retrieve user requirements from the configuration
try:
    user_requirements, programming_language, input_params, output_results = (
        get_input(config)
    )

    prompt = ChatPromptTemplate.from_messages(
        [
            (
                "system",
                "You are a helpful requirement gathering assistant, that will provided the requirements to code a function in a programming langauge.\n You will provided the all the use-cases that will be handled by the function, according to user requirements.",
            ),
            (
                "human",
                "The user requirements are {user_requirements}.\nThe Programming language is {programming_language}.\nThe input parameters will be {input_params}.\nThe expected output is {output_results}",
            ),
        ]
    )

    chain = prompt | llm
    result = chain.invoke(
        {
            "user_requirements": user_requirements,
            "programming_language": programming_language,
            "input_params": input_params,
            "output_results": output_results,

        }
    )

    print("result : ", result.content)

    return {
        "function_description": result.content,
        "programming_language": programming_language,
        "input_params": input_params,
        "output_results": output_results,
        "messages": [HumanMessage(content=result.content)]

    }
except Exception as e:
    print(f"Exception | get_requirements | {str(e)}")
    traceback.print_exc()

from typing import Annotated

from typing_extensions import TypedDict

from langgraph.graph.message import AnyMessage, add_messages

class State(TypedDict):
messages: Annotated[list[AnyMessage], add_messages]
`

[NewGHUser4321]

How are you updating the state? Could you show me those

[shahzain110]

I think i am not updating it. how will i do that?

[NewGHUser4321]

Look at this example. You can see how data from select_tools node is passed on to the agent node.