LangChainDeprecationWarning: Importing document loaders from langchain is deprecated. Importing from langchain will no longer be supported as of lang

Question

Im getting below warning and im able to reinstall pip but still it gives below warning. Error: .localpython/lib/python3.12/site-packages/langchain/document_loaders/init.py:36: LangChainDeprecationWarning: Importing document loaders from langchain is deprecated. Importing from langchain will no longer be supported as of langchain==0.2.0. Please import from langchain-community instead:

`from langchain_community.document_loaders import DirectoryLoader`.

To install langchain-community run `pip install -U langchain-community`.
  warnings.warn(
/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain/document_loaders/__init__.py:36: LangChainDeprecationWarning: Importing document loaders from langchain is deprecated. Importing from langchain will no longer be supported as of langchain==0.2.0. Please import from langchain-community instead:

`from langchain_community.document_loaders import TextLoader`.

To install langchain-community run `pip install -U langchain-community`.
  warnings.warn(
/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain/embeddings/__init__.py:29: LangChainDeprecationWarning: Importing embeddings from langchain is deprecated. Importing from langchain will no longer be supported as of langchain==0.2.0. Please import from langchain-community instead:

`from langchain_community.embeddings import OpenAIEmbeddings`.

To install langchain-community run `pip install -U langchain-community`.
  warnings.warn(
/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain/llms/__init__.py:548: LangChainDeprecationWarning: Importing LLMs from langchain is deprecated. Importing from langchain will no longer be supported as of langchain==0.2.0. Please import from langchain-community instead:

`from langchain_community.llms import OpenAI`.

To install langchain-community run `pip install -U langchain-community`.
  warnings.warn(
/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain/vectorstores/__init__.py:35: LangChainDeprecationWarning: Importing vector stores from langchain is deprecated. Importing from langchain will no longer be supported as of langchain==0.2.0. Please import from langchain-community instead:

`from langchain_community.vectorstores import Chroma`.

To install langchain-community run `pip install -U langchain-community`.
  warnings.warn(
Traceback (most recent call last):
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain_community/vectorstores/chroma.py", line 81, in __init__
    import chromadb
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/chromadb/__init__.py", line 2, in <module>
    import chromadb.config
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/chromadb/config.py", line 1, in <module>
    from pydantic import BaseSettings
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/pydantic/__init__.py", line 374, in __getattr__
    return _getattr_migration(attr_name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/pydantic/_migration.py", line 296, in wrapper
    raise PydanticImportError(
pydantic.errors.PydanticImportError: `BaseSettings` has been moved to the `pydantic-settings` package. See https://docs.pydantic.dev/2.6/migration/#basesettings-has-moved-to-pydantic-settings for more details.

For further information visit https://errors.pydantic.dev/2.6/u/import-error

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/bata/balm1fxr/OpenAI/chatgpt-retrieval-main/chatgpt.py", line 35, in <module>
    index = VectorstoreIndexCreator().from_loaders([loader])
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain/indexes/vectorstore.py", line 84, in from_loaders
    return self.from_documents(docs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain/indexes/vectorstore.py", line 89, in from_documents
    vectorstore = self.vectorstore_cls.from_documents(
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain_community/vectorstores/chroma.py", line 778, in from_documents
    return cls.from_texts(
           ^^^^^^^^^^^^^^^
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain_community/vectorstores/chroma.py", line 714, in from_texts
    chroma_collection = cls(
                        ^^^^
  File "/home/balm1fxr/.localpython/lib/python3.12/site-packages/langchain_community/vectorstores/chroma.py", line 84, in __init__
    raise ImportError(
**ImportError: Could not import chromadb python package. Please install it with `pip install chromadb`**

**Chatgp.py code** 

import os
import sys

import openai
from langchain.chains import ConversationalRetrievalChain, RetrievalQA
from langchain.chat_models import ChatOpenAI
from langchain.document_loaders import DirectoryLoader, TextLoader
from langchain.embeddings import OpenAIEmbeddings
from langchain.indexes import VectorstoreIndexCreator
from langchain.indexes.vectorstore import VectorStoreIndexWrapper
from langchain.llms import OpenAI
from langchain.vectorstores import Chroma

import constants

os.environ["OPENAI_API_KEY"] = constants.APIKEY

PERSIST = False

query = None
if len(sys.argv) > 1:
  query = sys.argv[1]

if PERSIST and os.path.exists("persist"):
  print("Reusing index...\n")
  vectorstore = Chroma(persist_directory="persist", embedding_function=OpenAIEmbeddings())
  index = VectorStoreIndexWrapper(vectorstore=vectorstore)
else:
  #loader = TextLoader("data/data.txt") # Use this line if you only need data.txt
  loader = DirectoryLoader("data/")
  if PERSIST:
    index = VectorstoreIndexCreator(vectorstore_kwargs={"persist_directory":"persist"}).from_loaders([loader])
  else:
    index = VectorstoreIndexCreator().from_loaders([loader])

chain = ConversationalRetrievalChain.from_llm(
  llm=ChatOpenAI(model="gpt-3.5-turbo"),
  retriever=index.vectorstore.as_retriever(search_kwargs={"k": 1}),
)

chat_history = []
while True:
  if not query:
    query = input("Prompt: ")
  if query in ['quit', 'q', 'exit']:
    sys.exit()
  result = chain({"question": query, "chat_history": chat_history})
  print(result['answer'])

  chat_history.append((query, result['answer']))
  query = None

Answer 1

The warning you're seeing is due to a recent change in LangChain. As of version 0.2.0, document_loaders have been moved from the langchain package to langchain-community. To resolve this issue, follow these steps:

Install the new package:

pip install langchain-community

Update your imports: Instead of importing from langchain, you should now import from langchain_community:

from langchain_community.document_loaders import DirectoryLoader, TextLoader

python version: 3.10.12

Answer 2

I got the same deprecation warning, but "from langchain_openai import ChatOpenAI" worked. There's a bug logged in the langchain that the team is looking at. https://github.com/DataDog/dd-trace-py/issues/8212