class_docstr: Test Evolution(Exp) class that takes a parameter x and a generator G and defines an evolution exp(ixG)
docstr: Test initializing and accessing the data property.
docstr_tok: ["Test","initializing","and","accessing","the","data","property","."]
code: def test_data(self):
      """Test initializing and accessing the data property."""
  
      param = np.array(1.234)
  
      base = qml.PauliX(0)
      op = Evolution(base, param)
  
      assert op.data == (param,)
      assert op.coeff == -1j * op.data[0]
      assert op.param == op.data[0]
  
      new_param = np.array(2.345)
      op.data = (new_param,)
  
      assert op.data == (new_param,)
      assert op.coeff == -1j * op.data[0]
      assert op.data == op.data[0]
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.ops.op_math import Evolution, Exp
label_desc: Use image node_id 7 for calling the TestEvolution obj's underlying member method code with example usage: obj.test_data() without return types