class_docstr: Test Evolution(Exp) class that takes a parameter x and a generator G and defines an evolution exp(ixG)
code: def test_num_params_for_parametric_base(self):
      base_op = 0.5 * qml.PauliY(0) + qml.PauliZ(0) @ qml.PauliX(1)
      op = Evolution(base_op, 1.23)
  
      assert base_op.num_params == 2
      assert op.num_params == 1
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.ops.op_math import Evolution, Exp
label_desc: Use image node_id 6 for calling the TestEvolution obj's underlying member method code with example usage: obj.test_num_params_for_parametric_base() without return types