class_docstr: Unit tests for the batch_transform class
class_docstr_tok: ["Unit","tests","for","the","batch_transform","class"]
docstr: Test that an error is raised if the transform
  is applied to an invalid function
docstr_tok: ["Test","that","an","error","is","raised","if","the","transform","is","applied","to","an","invalid","function"]
code: def test_error_invalid_callable(self):
      """Test that an error is raised if the transform
      is applied to an invalid function"""
  
      with pytest.raises(
          ValueError,
          match="does not appear to be a valid Python function",
      ):
          qml.batch_transform(5)
  
imports: import functools
  import pytest
  import pennylane
  from pennylane import numpy
label_desc: Use image node_id 5 for calling the TestBatchTransform obj's underlying member method code with example usage: obj.test_error_invalid_callable() without return types