v118

app.py

@@ -226,24 +226,33 @@ def safe_get_column(df, column):
 
 def plot_and_save(plt, filename=None, **savefig_kwargs):
     import os
+    import matplotlib
+    
+    # Make sure we're using the non-interactive backend
+    matplotlib.use('Agg')
+    
     if filename is None:
         filename = PLOT_FILENAME
     
     # Convert to absolute path
-    filename = os.path.abspath(filename)
+    filename = os.path.abspath(str(filename))
     
     # Ensure the directory exists
     os.makedirs(os.path.dirname(filename) or '.', exist_ok=True)
     
-    # Set default savefig parameters if not provided
-    save_params = {'bbox_inches': 'tight', 'dpi': 100}
-    save_params.update(savefig_kwargs)
-    
-    # Save the plot
-    plt.savefig(filename, **save_params)
-    plt.close()
-    print(f"[DEBUG] Plot saved to: {filename}")
-    return filename
+    try:
+        # Set default savefig parameters if not provided
+        save_params = {'bbox_inches': 'tight', 'dpi': 100}
+        save_params.update(savefig_kwargs)
+        
+        # Save the plot using the matplotlib savefig function directly
+        plt.savefig(filename, **save_params)
+        plt.close()
+        print(f"[DEBUG] Plot saved to: {filename}")
+        return filename
+    except Exception as e:
+        print(f"[ERROR] Failed to save plot: {str(e)}")
+        return None
 
 # Monkey patch DataFrame to add safe column access
 import pandas as pd