class_docstr: Test Evolution(Exp) class that takes a parameter x and a generator G and defines an evolution exp(ixG)
docstr: Test that has_generator returns False if the coefficient is not purely imaginary.
docstr_tok: ["Test","that","has_generator","returns","False","if","the","coefficient","is","not","purely","imaginary","."]
code: def test_has_generator_false(self):
      """Test that has_generator returns False if the coefficient is not purely imaginary."""
      U = Evolution(qml.PauliX(0), 3j)
      assert U.has_generator is False
  
      U = Evolution(qml.PauliX(0), 0.01 + 2j)
      assert U.has_generator is False
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.ops.op_math import Evolution, Exp
label_desc: Use image node_id 4 for calling the TestEvolution obj's underlying member method code with example usage: obj.test_has_generator_false() without return types