Update app.py

app.py

@@ -16,10 +16,12 @@ model = genai.GenerativeModel('gemini-2.0-flash-thinking-exp')
 def clean_column_name(col_name):
     """Clean column names to be compatible with Arrow"""
     cleaned = re.sub(r"[^\w\s]", " ", str(col_name).lower())
- cleaned = re.sub(r"\s+", "_", cleaned.strip())
+    cleaned = re.sub(r"\s+", "_", cleaned.strip())
     # Preserve currency indicators
-    if "usd" in cleaned: return cleaned.replace("usd", "_usd")
-    if "zw" in cleaned: return cleaned.replace("zw", "_zw")
+    if "usd" in cleaned: 
+        return cleaned.replace("usd", "_usd")
+    if "zw" in cleaned: 
+        return cleaned.replace("zw", "_zw")
     return cleaned
 
 def clean_tin_value(val):