ModuleNotFoundError: No module named 'langchain.chat_models'

MSMALG commented 1 year ago

System Info

Langchain version 0.0.305 Python version 3.101.1 Platform VScode

I am trying to create a chatbot using langchain and streamlit by running this code:

import os
import streamlit as st
from st_chat_message import message
from dotenv import load_dotenv

from langchain.chat_models import ChatOpenAI
from langchain.schema import (
    SystemMessage,
    HumanMessage,
    AIMessage
)

def init():
    load_dotenv()

    #Checking Openai api key
    if os.getenv("OPENAI_API_KEY") is None or os.getenv("OPENAI_API_KEY") == "":
        print("OPENAI_API_KEY is NOT set yet")
        exit(1)
    else:
        print("OPENAI_API_KEY is fully set")

    st.set_page_config(
        page_title = "ZIKO",
        page_icon = "🤖"
    )

def main():
    init()

    chat = ChatOpenAI(temprature = 0)
    messages = [
        SystemMessage(content="You are a helpful assistant.")
        #HumanMessage(content=input),
        #AIMessage()
    ]

    st.header("ZIKO 🤖")

    with st.sidebar:
        user = st.text_input("Enter your message: ", key = "user")

    if user:
        message(user, is_user = True)
        messages.append(HumanMessage(content=user))
        response = chat(messages)
        message(response.content)

if __name__ == '__main__':
    main()

But I am getting this message: ModuleNotFoundError: No module named 'langchain.chat_models'

Who can help?

No response

Information

[ ] The official example notebooks/scripts
[ ] My own modified scripts

Related Components

[ ] LLMs/Chat Models
[ ] Embedding Models
[ ] Prompts / Prompt Templates / Prompt Selectors
[ ] Output Parsers
[ ] Document Loaders
[ ] Vector Stores / Retrievers
[ ] Memory
[ ] Agents / Agent Executors
[ ] Tools / Toolkits
[ ] Chains
[ ] Callbacks/Tracing
[ ] Async

Reproduction

Steps to reproduce: Installing langchain Importing langchain.chat_modules

Expected behavior

Module loads successfully

dosubot[bot] commented 1 year ago

🤖

Hello,

Thank you for reaching out. The error you're encountering, "ModuleNotFoundError: No module named 'langchain.chat_models'", could be due to several reasons. Here are a few things you can check:

Check if the LangChain package is installed: You can do this by running pip show langchain in your terminal. If the package is not installed, you can install it by running pip install langchain.
Check your Python environment: If you're using a virtual environment, make sure you've activated the correct environment. If you're using an IDE like VSCode, check the interpreter settings to ensure it's using the correct Python interpreter.
Check your PYTHONPATH: The Python interpreter uses this environment variable to determine which directories to search for modules. Make sure it includes the directory where the 'langchain' package is installed.
Check if there's a naming conflict: If one of the files in your project is named langchain.py, the Python interpreter might be importing this file instead of the actual langchain package. If this is the case, renaming the file should resolve the issue.
Update LangChain: There was a similar issue reported in the LangChain repository (issue #10887) which was resolved by updating LangChain to the latest version. You can do this by running pip install --upgrade langchain.

The 'langchain.chat_models' module does exist in the LangChain codebase and it includes classes such as 'SimpleChatModel' and 'AzureMLChatOnlineEndpoint'. If the above steps don't resolve your issue, please provide more information about your setup (e.g., your operating system, how you installed Python and LangChain, etc.) so we can better assist you.

Best, Dosu

Sources

This response is meant to be useful and save you time. It is not meant to be a precise solution, but rather a starting point for your own research.

Help me be more useful! Please leave a 👍 if this is helpful and 👎 if it is irrelevant.

If you want to continue the conversation, start your reply with @dosu-bot.

a-gasior commented 1 year ago

I had this same issue and switched my python from version 3.10.12 -> 3.11.5 and the issue was resolved.

code-haven commented 10 months ago

I ran into this and realised that it was failing because I had the import inside a folder/module called "langchain" which causes the interpreter to look for files within the folder. I renamed the module to something else and it worked.

dosubot[bot] commented 7 months ago

Hi, @MSMALG,

I'm helping the LangChain team manage our backlog and am marking this issue as stale. It looks like you're encountering a "ModuleNotFoundError" when trying to import 'langchain.chat_models' while creating a chatbot using Langchain and Streamlit. There have been responses from other users, including myself, a-gasior, and code-haven, offering potential solutions such as troubleshooting steps, switching Python versions, and renaming the module to resolve the import failure.

Could you please confirm if this issue is still relevant to the latest version of the LangChain repository? If it is, please let the LangChain team know by commenting on the issue. Otherwise, feel free to close the issue yourself, or it will be automatically closed in 7 days.

Thank you for your understanding and cooperation.

langchain-ai / langchain