Update app.py

app.py

@@ -4,11 +4,18 @@ from langchain.text_splitter import (
     RecursiveCharacterTextSplitter,
 )
 
-
+def extract_separators_from_string(separator_str):
+    try:
+        separators = separators_str[1:-1].split(", ")
+        return [separator.replace('"', "").replace("'", "") for separator in separators]
+    except:
+        raise gr.Error(f"""
+        Did not succeed in extracting seperators from string: {separator_str}.
+        Please type it in the correct format: "['separator_1', 'separator_2', etc]"
+        """)
+        
 def chunk(text, length, splitter_selection, separators_str):
-    # Extract list of separators from the string
-    separators = separators_str[1:-1].split(", ")
-    separators = [separator.replace('"', "").replace("'", "") for separator in separators]
+    separators = extract_separators_from_string(separators_str)
     
     if splitter_selection == "LangChain's CharacterTextSplitter":
         text_splitter = CharacterTextSplitter(