| from langchain_core.output_parsers import StrOutputParser |
| from langchain_core.prompts import ChatPromptTemplate |
| from langchain_core.runnables import RunnablePassthrough |
| from langchain_openai import ChatOpenAI |
| |
| prompt = ChatPromptTemplate.from_template( |
| "Tell me a short joke about {topic}") |
| output_parser = StrOutputParser() |
| model = ChatOpenAI(model="gpt-3.5-turbo") |
| chain = ( |
| {"topic": RunnablePassthrough()} |
| | prompt |
| | model |
| | output_parser |
| ) |
| if __name__ == "__main__": |
| import asyncio |
| loop = asyncio.get_event_loop() |
| result = loop.run_until_complete( |
| chain.ainvoke("ice cream") |
| ) |
| print(result) |
