Update pipeline.py

pipeline.py

@@ -8,6 +8,7 @@ from langchain.embeddings import HuggingFaceEmbeddings
 from langchain.vectorstores import FAISS
 from langchain.chains import RetrievalQA
 from smolagents import CodeAgent, DuckDuckGoSearchTool, ManagedAgent, LiteLLMModel
+from langchain.llms.base import LLM 
 import subprocess  # Import subprocess to run shell commands
 
 # Import the chain builders from our separate files