Update app.py

app.py

@@ -96,9 +96,10 @@ class DocumentQA:
         Raises:
             ValueError: If an error occurs during the process.
         """
-        webpage_text =''
-        for url in urls.split(','):
-          webpage_text += self.get_content_from_url(url)
+        webpage_text =[]
+        for url in urls.split(','):  
+          
+            webpage_text.extend(self.get_content_from_url(url))
         
         knowledge_base = self.create_knowledge_base(webpage_text)
         
@@ -154,13 +155,13 @@ class DocumentQA:
 
 
         file_paths = [single_file_path.name for single_file_path in file_paths]
-        docs =''
+        docs =[]
         for file_obj in file_paths:
 
            loader = UnstructuredFileLoader(file_obj, strategy="fast")
 
            # Load the contents of the file using the loader
-           docs +=loader.load()
+           docs.extend(loader.load())
 
         # Create a knowledge base from the loaded documents using the create_knowledge_base() method
         knowledge_base = self.create_knowledge_base(docs)