Update functions.py

functions.py

@@ -22,6 +22,7 @@ from langchain_core.output_parsers import StrOutputParser
 from langchain_core.output_parsers import JsonOutputParser
 from langchain_community.vectorstores.utils import filter_complex_metadata
 from langchain.schema import Document
+from langchain_community.document_loaders.directory import DirectoryLoader
 from langgraph.graph import START, END, StateGraph