Update app.py

app.py

@@ -154,7 +154,6 @@ def call_wordlift_api(text: str, keywords: Optional[List[str]] = None) -> Option
 # ------------------------
 # Main Evaluation Batch Function
 # ------------------------
-
 def evaluate_urls_batch(url_data: pd.DataFrame):
     """
     Evaluates a batch of URLs using the WordLift API.
@@ -167,7 +166,9 @@ def evaluate_urls_batch(url_data: pd.DataFrame):
         - A pandas DataFrame with the summary results.
         - A dictionary containing the full results (including errors) keyed by URL.
     """
-    if not url_data or url_data.empty:
+    # Corrected check: Use .empty to see if the DataFrame has any rows
+    if url_data.empty:
+        logger.info("Input DataFrame is empty. Returning empty results.")
         return pd.DataFrame(columns=['URL', 'Status', 'Overall Score', 'Content Purpose', 'Content Accuracy', 'Content Depth', 'Readability Score (API)', 'Readability Grade Level', 'SEO Score', 'Word Count', 'Error/Details']), {}
 
     summary_results = []