code: def test_transform_and_inverse(self):
      # Check a full circle transform back to the native projection.
      x = np.arange(-60, 42.5, 2.5)
      y = np.arange(30, 72.5, 2.5)
      x2d, y2d = np.meshgrid(x, y)
      u = np.cos(np.deg2rad(y2d))
      v = np.cos(2.0 * np.deg2rad(x2d))
      src_proj = ccrs.PlateCarree()
      target_proj = ccrs.Stereographic(
          central_latitude=90, central_longitude=0
      )
      proj_xyz = target_proj.transform_points(src_proj, x2d, y2d)
      xt, yt = proj_xyz[..., 0], proj_xyz[..., 1]
      ut, vt = target_proj.transform_vectors(src_proj, x2d, y2d, u, v)
      utt, vtt = src_proj.transform_vectors(target_proj, xt, yt, ut, vt)
      assert_array_almost_equal(u, utt, decimal=4)
      assert_array_almost_equal(v, vtt, decimal=4)
  
file_path: cartopy/lib/cartopy/tests/test_crs_transform_vectors.py
imports: import warnings
  import numpy
  from numpy.testing import assert_array_almost_equal
  import pytest
  import cartopy.crs
label_desc: Use image node_id 2 for calling the TestTransformVectors obj's underlying member method code with example usage: obj.test_transform_and_inverse() without return types