code: def test_bound_module() -> None:
      ref = ng.p.Scalar()
      with pytest.raises(ng.errors.NevergradValueError):
          _datalayers.Bound(3, 8, method="arctan")(ref)
      x = _datalayers.Bound(-1, 8, method="arctan")(ref)
      x.set_standardized_data([100], reference=ref)
      np.testing.assert_almost_equal(x.value, 7.97135306)
  
imports: import pytest
  import numpy
  import nevergrad
  from nevergrad.common import testing
  import nevergrad.common.typing
  from .None import _datalayers
  from .None import helpers
label_desc: Use image node_id 2 for calling a global function with example usage: test_bound_module() without return types