minor fix

Author: hangzhaomit

eval.py

@@ -96,10 +96,10 @@ def evaluate(segmentation_module, loader, args):
     # summary
     iou = intersection_meter.sum / (union_meter.sum + 1e-10)
     for i, _iou in enumerate(iou):
-        print('class [{}], IoU: {}'.format(i, _iou))
+        print('class [{}], IoU: {:.4f}'.format(i, _iou))
 
     print('[Eval Summary]:')
-    print('Mean IoU: {:.4}, Accuracy: {:.2f}%, Inference Time: {:.4}s'
+    print('Mean IoU: {:.4f}, Accuracy: {:.2f}%, Inference Time: {:.4f}s'
           .format(iou.mean(), acc_meter.average()*100, time_meter.average()))