code: def test_no_update():
      cm = ConfusionMatrix(10)
      with pytest.raises(
          NotComputableError,
          match=r"Confusion matrix must have at least one example before it ",
      ):
          cm.compute()
  
imports: import os
  import numpy
  import pytest
  import torch
  from sklearn.metrics import accuracy_score, confusion_matrix, precision_score, recall_score
  import ignite.distributed
  from ignite.exceptions import NotComputableError
  from ignite.metrics import ConfusionMatrix, IoU, JaccardIndex, mIoU
  from ignite.metrics.confusion_matrix import cmAccuracy, cmPrecision, cmRecall, DiceCoefficient
label_desc: Use image node_id 1 for calling a global function with example usage: test_no_update() without return types