langchain/templates/sql-research-assistant/sql_research_assistant/chain.py

from langchain.pydantic_v1 import BaseModel
from langchain_core.runnables import RunnablePassthrough

from sql_research_assistant.search.web import chain as search_chain
from sql_research_assistant.writer import chain as writer_chain

chain_notypes = (
    RunnablePassthrough().assign(research_summary=search_chain) | writer_chain
)


class InputType(BaseModel):
    question: str


chain = chain_notypes.with_types(input_type=InputType)


if __name__ == "__main__":
    print(
        chain.invoke({"question": "who is typically older: point guards or centers?"})
    )