Update app.py

app.py

@@ -35,6 +35,7 @@ def change_split_selection(split_selection):
 
 def chunk(text, length, splitter_selection, separators_str, length_unit_selection, chunk_overlap):
     separators = extract_separators_from_string(separators_str)
+    print('Extracted separators:', ',,'.join(separators))
     length_function = (length_tokens if "token" in length_unit_selection.lower() else len)
     if splitter_selection == LABEL_TEXTSPLITTER:
         text_splitter = CharacterTextSplitter(
@@ -63,12 +64,14 @@ def chunk(text, length, splitter_selection, separators_str, length_unit_selectio
 
 def change_preset_separators(choice):
     text_splitter = RecursiveCharacterTextSplitter()
-    if choice == "Default":
+    if choice == "Default recursive":
         return ["\n\n", "\n", " ", ""]
     elif choice == "Markdown":
         return text_splitter.get_separators_for_language(Language.MARKDOWN)
     elif choice == "Python":
         return text_splitter.get_separators_for_language(Language.PYTHON)
+    else:
+        raise gr.Error("Choice of preset not recognized.")
 
 
 EXAMPLE_TEXT = """### Chapter 6