code: def test_projective_str():
      tform = ProjectiveTransform()
      want = re.escape(
          textwrap.dedent(
              """
          <ProjectiveTransform(matrix=
              [[1., 0., 0.],
               [0., 1., 0.],
               [0., 0., 1.]])>
          """
          ).strip()
      )
      # Hack the escaped regex to allow whitespace before each number for
      # compatibility with different numpy versions.
      want = want.replace("0\\.", " *0\\.")
      want = want.replace("1\\.", " *1\\.")
      assert re.match(want, str(tform))
  
imports: import re
  import textwrap
  import numpy
  import pytest
  from numpy.testing import assert_almost_equal, assert_array_almost_equal, assert_equal
  from skimage.transform import AffineTransform, EssentialMatrixTransform, EuclideanTransform, FundamentalMatrixTransform, PiecewiseAffineTransform, PolynomialTransform, ProjectiveTransform, SimilarityTransform, estimate_transform, matrix_transform
  from skimage.transform._geometric import _GeometricTransform, _affine_matrix_from_vector, _center_and_normalize_points, _euler_rotation_matrix
label_desc: Use image node_id 40 for calling a global function with example usage: test_projective_str() without return types