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chatbot.py

@@ -23,13 +23,21 @@ try:
 except ImportError:
     pass  # Not in HF Spaces, use default sqlite3
 
-from langchain.chains import LLMChain
-from langchain.document_loaders import TextLoader
-from langchain.text_splitter import CharacterTextSplitter
-from langchain.vectorstores import Chroma
-from langchain.embeddings import HuggingFaceEmbeddings
-from langchain.llms.base import LLM
-from langchain.prompts import PromptTemplate
+# LangChain imports - using langchain_community for newer versions
+try:
+    # Try newer import paths first (langchain >= 0.1.0)
+    from langchain_community.document_loaders import TextLoader
+    from langchain_community.vectorstores import Chroma
+    from langchain_community.embeddings import HuggingFaceEmbeddings
+    from langchain.text_splitter import CharacterTextSplitter
+    from langchain_core.language_models.llms import LLM
+except ImportError:
+    # Fall back to older import paths (langchain < 0.1.0)
+    from langchain.document_loaders import TextLoader
+    from langchain.vectorstores import Chroma
+    from langchain.embeddings import HuggingFaceEmbeddings
+    from langchain.text_splitter import CharacterTextSplitter
+    from langchain.llms.base import LLM
 
 from config import Scenario, ResearcherControlledParams, ParticipantVisibleParams
 

requirements.txt

@@ -3,8 +3,10 @@ gradio>=4.44.0
 pandas>=2.0.0
 openpyxl>=3.1.0
 
-# LangChain and RAG
-langchain>=0.0.310
+# LangChain and RAG (newer modular packages)
+langchain>=0.1.0
+langchain-community>=0.0.10
+langchain-core>=0.1.0
 chromadb>=0.4.13
 sentence-transformers>=2.2.0