class_docstr: Test the Hermitian observable
class_docstr_tok: ["Test","the","Hermitian","observable"]
docstr: Tests that the hermitian operator raises an error when instantiated with wires=[].
docstr_tok: ["Tests","that","the","hermitian","operator","raises","an","error","when","instantiated","with","wires=","[","]","."]
code: def test_hermitian_empty_wire_list_error(self):
      """Tests that the hermitian operator raises an error when instantiated with wires=[]."""
      herm_mat = np.array([]).reshape((0, 0))
  
      with pytest.raises(ValueError, match="wrong number of wires"):
          qml.Hermitian(herm_mat, wires=[])
  
imports: import functools
  import pickle
  import pytest
  import numpy
  from gate_data import I, X, Y, Z, H
  import pennylane
  from pennylane.ops.qubit.observables import BasisStateProjector, StateVectorProjector
label_desc: Use image node_id 15 for calling the TestHermitian obj's underlying member method code with example usage: obj.test_hermitian_empty_wire_list_error() without return types