LangChain: ModuleNotFoundError: No module named 'langchain_community'
Traceback (most recent call last):
File "app.py", line 3, in <module>
from langchain_community.llms import OpenAI
ModuleNotFoundError: No module named 'langchain_community'
Immediate Remediation
bash
pip install langchain-community
Root Cause Analysis
LangChain v0.1+ split community integrations into a separate package `langchain-community`, which is not installed by default.
Verification & Guardrails
- Ensure you have LangChain >=0.1.0; for older versions, use `from langchain.llms import OpenAI`.
- If you're using a specific integration, you may need to install additional packages like `langchain-openai`.
- Check your imports: `langchain_community` is for community-maintained integrations.
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