langchain_openai

requirements.txt

@@ -2,4 +2,5 @@ langchain
 requests
 weaviate-client 
 openai
-tiktoken
+tiktoken
+langchain_openai

start.py

@@ -1,17 +1,16 @@
 st.session_state.em = "0"
 
 try: 
-    global rag_chain, retriever, em
-    import requests
-    from langchain.document_loaders import TextLoader
-    from langchain.text_splitter import CharacterTextSplitter
-    import re
-
-    import requests
-    #import fitz  # PyMuPDF
-    
     if 'retriever' not in st.session_state:
-    
+        global rag_chain, retriever, em
+        import requests
+        from langchain.document_loaders import TextLoader
+        from langchain.text_splitter import CharacterTextSplitter
+        import re
+
+        import requests
+        #import fitz  # PyMuPDF
+        
 
         os.environ["OPENAI_API_KEY"]  = os.getenv('openkey')
         org = os.getenv('openorg')