Cant import create_retrieval_chain on new version of langchain==0.3.0

[Pochomo]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

from app.services.document_loader import PDFLoader
from app.services.vector_store import VectorStore
from langchain_community.chat_models import ChatOpenAI
from langchain.chains import create_retrieval_chain 
from langchain.memory import ConversationBufferMemory
from pydantic import BaseModel
from typing import List

router = APIRouter()

pdf_loader = PDFLoader()
vector_store = VectorStore()

class ChatRequest(BaseModel):
    message: str


@router.post("/upload-pdf")
async def upload_pdf(files: List[UploadFile] = File(...)):



@router.post("/chat")
async def chat(request: ChatRequest):

@router.get("/check-vector-store")
async def check_vector_store(is_law_related: bool = False):

Error Message and Stack Trace (if applicable)

"create_retrieval_chain" is unknown import symbol

Description

I have an error here "from langchain.chains import create_retrieval_chain"
, the contents of the error are as follows ""create_retrieval_chain" is unknown import symbol". my version of langchains are

[langchain 0.3.0
langchain-anthropic 0.2.1
langchain-chroma 0.1.4
langchain-community 0.3.0
langchain-core 0.3.2
langchain-openai 0.2.0
langchain-text-splitters 0.3.0]

can window cause an error?? I really need to fix this, please help.

System Info

python 3.12.6
langchain 0.3.0
langchain-anthropic 0.2.1
langchain-chroma 0.1.4
langchain-community 0.3.0
langchain-core 0.3.2
langchain-openai 0.2.0
langchain-text-splitters 0.3.0

[Pochomo]

when i used "from langchain.chains import ConversationalRetrievalChain" it was working, but not now lanchain let me change to create_retrieval_chain

[binhnd102]

@Pochomo Could you use this instead?
from langchain.chains.retrieval import create_retrieval_chain

[Pochomo]

@Pochomo Could you use this instead? from langchain.chains.retrieval import create_retrieval_chain

I I solved it using venv thx:)

[dosubot]

Hi, @Pochomo. I'm Dosu, and I'm helping the LangChain team manage their backlog. I'm marking this issue as stale.

Issue Summary:

• You reported an "unknown import symbol" error with create_retrieval_chain in version 0.3.0.
• The import ConversationalRetrievalChain worked previously but not currently.
• User binhnd102 suggested a correct import statement, which resolved the issue.
• You confirmed that using a virtual environment (venv) also helped resolve the issue.

Next Steps:

• Please confirm if this issue is still relevant to the latest version of LangChain. If so, you can keep the discussion open by commenting here.
• Otherwise, this issue will be automatically closed in 7 days.

Thank you for your understanding and contribution!