Update app.py

app.py

@@ -15,24 +15,34 @@ import time
 import groq
 import uuid  # For generating unique filenames
 
-# Updated imports to address LangChain deprecation warnings:
-from langchain_groq import ChatGroq
-#from langchain.schema import HumanMessage
-from langchain_core.messages import HumanMessage
-
-#from langchain_text_splitters import RecursiveCharacterTextSplitter
-try:
+# OLD Updated imports to address LangChain deprecation warnings:
+#from langchain_groq import ChatGroq
+#*from langchain.schema import HumanMessage
+#from langchain_core.messages import HumanMessage
+#*from langchain_text_splitters import RecursiveCharacterTextSplitter
+#try:
     # For newer versions
-    from langchain_text_splitters import RecursiveCharacterTextSplitter
-except ImportError:
+#    from langchain_text_splitters import RecursiveCharacterTextSplitter
+#except ImportError:
     # For older versions
-    from langchain.text_splitter import RecursiveCharacterTextSplitter
+#    from langchain.text_splitter import RecursiveCharacterTextSplitter
+#from langchain_community.vectorstores import Chroma
+#from langchain_community.embeddings import HuggingFaceEmbeddings
+#*from langchain.docstore.document import Document
+#from langchain_core.documents import Document
 
-from langchain_community.vectorstores import Chroma
-from langchain_community.embeddings import HuggingFaceEmbeddings
 
-#from langchain.docstore.document import Document
+
+# NEW IMPORTS (current):
+from langchain_core.messages import HumanMessage, SystemMessage, AIMessage
+from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain_core.documents import Document
+from langchain_community.document_loaders import TextLoader, PyPDFLoader
+from langchain_community.embeddings import HuggingFaceEmbeddings
+from langchain_community.llms import HuggingFaceHub
+from langchain.chains import RetrievalQA  # This one might still be in main langchain
+from langchain_community.vectorstores import Chroma #from old library
+from langchain_groq import ChatGroq
 
 # Importing chardet (make sure to add chardet to your requirements.txt)
 import chardet