| 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__": |
| for chunk in chain.stream("ice cream"): |
| print(chunk, end="", flush=True) |
