Update app.py

app.py

@@ -10,6 +10,9 @@ import gradio as gr
 import pandas as pd
 from datetime import datetime
 
+# --- THE FINAL FIX IS HERE: Re-introducing the missing import ---
+import regex as re2
+
 # --- BACKEND IMPORTS ---
 from langchain_cohere import ChatCohere
 
@@ -34,11 +37,11 @@ def load_markdown_text(filepath: str) -> str:
 
 def _sanitize_text(s: str) -> str:
     if not isinstance(s, str): return s
+    # This now works because 're2' is defined from the import above
     return re2.sub(r'[\p{C}--[\n\t]]+', '', s)
 
 def _create_python_script(user_scenario: str, schema_context: str) -> str:
     """Uses an LLM to act as an "AI Coder", writing a complete Python script."""
-    # --- THE FINAL PROMPT FIX IS HERE ---
     prompt_for_coder = f"""
 You are an expert Python data scientist. Your sole job is to write a single, complete, and executable Python script to answer the user's request.
 You have access to a list of pandas dataframes loaded into a variable named `dfs`.