code: def test_unrecognized_multioutput():
      with pytest.raises(ValueError):
          initialize_vars(multioutput="meadian")
  
imports: import numpy
  import pytest
  import tensorflow
  from sklearn.metrics import r2_score
  from tensorflow_addons.metrics import RSquare
  from tensorflow_addons.metrics.r_square import _VALID_MULTIOUTPUT
label_desc: Use image node_id 13 for calling a global function with example usage: test_unrecognized_multioutput() without return types