small fix

my_metricv2.py

@@ -181,5 +181,8 @@ def calculate(predictions, references, max_iou: float = 0.5):
         acc.update(refs[:,0].astype('int').tolist(), preds[:,0].astype('int').tolist(), C)
 
     mh = mm.metrics.create()
-    summary = mh.compute(acc)
-    return summary.to_dict()
+    summary = mh.compute(acc).to_dict()
+    for key in summary:
+        summary[key] = summary[key][0]
+    
+    return summary