code: def test_shortest_line(prepare):
      g1 = shapely.linestrings([(0, 0), (1, 0), (1, 1)])
      g2 = shapely.linestrings([(0, 3), (3, 0)])
      actual = shapely.shortest_line(_prepare_input(g1, prepare), g2)
      expected = shapely.linestrings([(1, 1), (1.5, 1.5)])
      assert shapely.equals(actual, expected)
  
imports: import numpy
  import pytest
  import shapely
  from shapely import GeometryCollection, LinearRing, LineString, MultiLineString, Point
  from shapely.errors import UnsupportedGEOSVersionError
  from shapely.testing import assert_geometries_equal
  from shapely.tests.common import empty_line_string, empty_point, line_string, linear_ring, multi_line_string, multi_point, multi_polygon, point, polygon
label_desc: Use image node_id 20 for calling a global function with example usage: test_shortest_line(prepare) without return types