code: def test_normalize():
      f = np.arange(64)
      assert len(_normalize_sequence(f, 1, "test")) == f.ndim
      f = f.reshape((2, 2, 2, -1))
      assert len(_normalize_sequence(f, 1, "test")) == f.ndim
      f = f.reshape((2, 2, 2, 1, 1, -1))
      assert len(_normalize_sequence(f, 1, "test")) == f.ndim
  
imports: import numpy
  from mahotas.internal import _get_output, _get_axis
  from mahotas.internal import _normalize_sequence, _verify_is_integer_type, _verify_is_floatingpoint_type, _as_floating_point_array
  from mahotas.internal import _check_3
  import pytest
label_desc: Use image node_id 8 for calling a global function with example usage: test_normalize() without return types