improve formatting

check_opnsense_traffic_for_host.py

@@ -87,8 +87,10 @@ def main():
                 'cumulative_out': np.average([x['cumulative_bytes_out'] for x in traffic_data]),
                 'connections': int(np.average([len(x['details']) for x in traffic_data]))
             }
-        except:
-            print('Failed to parse traffic data.')
+        except Exception as e:
+            print(f'UNKNOWN: Failed to parse traffic data: "{e}"')
+            print(traceback.format_exc())
+            print('\nRaw data:')
             print(traffic_data)
             sys.exit(nagios.UNKNOWN)