Update summarizer.py

summarizer.py

@@ -3,14 +3,13 @@ from langchain_community.document_loaders import UnstructuredPowerPointLoader
 from langchain_cohere.llms import Cohere
 from langchain.chains.summarize import load_summarize_chain
 from pathlib import Path
-import os
 
 def summarize_files(method, files):
     # Initialize the LLM
     llm = Cohere(temperature=0)
     summaries = []
     # Load and read each file
-    for file in os.listdir(files):
+    for file in files:
         
         file_path = os.path.join(files, file)
         ext = Path(file_path).suffix.lower()