Update app.py

app.py

@@ -253,6 +253,10 @@ class FileProcessor:
         """Process a zip file and extract its contents"""
         dataset = []
         try:
+            if not os.path.isfile(zip_file_path):
+                logger.error(f"Zip file does not exist: {zip_file_path}")
+                return dataset
+    
             with zipfile.ZipFile(zip_file_path, 'r') as zip_ref:
                 zip_ref.extractall(extract_to)
                 for file_info in zip_ref.infolist():
@@ -260,6 +264,8 @@ class FileProcessor:
                         continue
                     extracted_file_path = os.path.join(extract_to, file_info.filename)
                     dataset.extend(self._process_single_file(open(extracted_file_path, 'rb')))
+        except FileNotFoundError as e:
+            logger.error(f"File not found: {e}")
         except Exception as e:
             logger.error(f"Error processing zip file: {e}")
         return dataset