code: def setup_class(cls):
      cls.x, cls.y = _sample_plate_carree_coordinates()
      cls.u, cls.v = _sample_plate_carree_vector_field()
      cls.s = _sample_plate_carree_scalar_field()
  
file_path: cartopy/lib/cartopy/tests/test_vector_transform.py
imports: import numpy
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  import pytest
  import cartopy.crs
  import cartopy.vector_transform
label_desc: Use image node_id 1 for calling the Test_vector_scalar_to_grid obj's underlying member method code with example usage: obj.setup_class(cls) without return types