class_docstr: Test the normalize function.
class_docstr_tok: ["Test","the","normalize","function","."]
docstr: Test that 2D arrays raise an error
docstr_tok: ["Test","that","2D","arrays","raise","an","error"]
code: def test_call_error(self):
      """Test that 2D arrays raise an error"""
      self.assertRaises(
          NotImplementedError, normalize, [[1, 2], [3, 4]]
      )
  
imports: from __future__ import division
  import numpy
  import unittest
  from numpy.testing import assert_allclose
  from GPyOpt.core.errors import InvalidConfigError
  from GPyOpt.core.task.space import Design_space
  from GPyOpt.experiment_design import initial_design
  from GPyOpt.util.general import normalize
label_desc: Use image node_id 1 for calling the TestNormalization obj's underlying member method code with example usage: obj.test_call_error() without return types