Update utils.py

utils.py

@@ -28,7 +28,8 @@ from pygments import highlight
 from pygments.lexers import guess_lexer,get_lexer_by_name
 from pygments.formatters import HtmlFormatter
 
-from langchain.chains import LLMChain, RetrievalQA, RunnableSequence 
+from langchain.chains import LLMChain, RetrievalQA
+from langchain import RunnableSequence
 from langchain.prompts import PromptTemplate
 from langchain_community.document_loaders import PyPDFLoader,  UnstructuredWordDocumentLoader, DirectoryLoader
 #from langchain.document_loaders.blob_loaders.youtube_audio import YoutubeAudioLoader
@@ -316,7 +317,7 @@ def rag_chain(llm, prompt,  retriever):
         # Erstelle eine RunnableSequence
         chain = RunnableSequence(steps=[RAG_CHAIN_PROMPT, llm])
         # Verwende die Kette
-        result = chain.invoke({"context": relevant_docs, "question": prompt})
+        result = chain.invoke({"context": relevant_docs, "question": prompt})     
     else:
         # keine relevanten Dokumente gefunden
         result = "Keine relevanten Dokumente gefunden"