Update app.py

app.py

@@ -880,7 +880,7 @@ def generate_ai_insights():
     
     # Check for date columns
     date_cols = []
-    for col in df.columns:
+    for col in df.columns.tolist():
         if df[col].dtype == 'object':
             try:
                 pd.to_datetime(df[col])
@@ -1309,7 +1309,7 @@ def display_distribution_tab():
                     
                     # Show highest correlations
                     corr_df = corr_matrix.stack().reset_index()
-                    corr_df.columns = ['Variable 1', 'Variable 2', 'Correlation']
+                    corr_df.columns.tolist() = ['Variable 1', 'Variable 2', 'Correlation']
                     corr_df = corr_df[corr_df['Variable 1'] != corr_df['Variable 2']]
                     corr_df = corr_df.sort_values('Correlation', ascending=False).head(5)