Langchain Recent Changes 16/02/2024

Version: 1.00 Date: 16/02/202

As Lancghain evolves, we keep seeing ongoing changes; recently, we have seen changes in moving ChatOpenAI to pip show langchain-community. We have also seen a change in how we are calling ChatOpenAI, we now use invoke. Here is a working Python code, you can find the lib version numbers in the code that I am using.

I am using langchain 0.1.7

#I am using langchain-community 0.0.20

#Langchain has moved to use separate community library for ChatOpenAI

from langchain_openai.chat_models import ChatOpenAI

from langchain.prompts import PromptTemplate

from langchain.schema import HumanMessage, AIMessage, SystemMessage

print("Starting application.")

# Your OpenAI API key - replace "your_api_key_here" with your actual API key

openai_api_key = "Put you key here"

chat = ChatOpenAI(model_name="gpt-3.5-turbo", api_key=openai_api_key)

conversation_history = [

HumanMessage(content="Suggest 3 bday gift for a data scientist."),

AIMessage(content="What is you price range?"),

SystemMessage(content="Under 100$$"),

]

#This used to be and is now been deprecated: ret = chat(conversation_history)

ret = chat.invoke(conversation_history)

print(ret.pretty_print())

print("Finished application.")

I will continue to update you with the latest working code snippet.