code: def test_is_vertex():
      assert is_vertex(2) is False
      assert is_vertex((2, 3)) is True
      assert is_vertex(Point(2, 3)) is True
      assert is_vertex((2, 3, 4)) is True
      assert is_vertex((2, 3, 4, 5)) is False
  
imports: from sympy.functions.elementary.complexes import Abs
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.core import S, Rational
  from sympy.integrals.intpoly import decompose, best_origin, distance_to_side, polytope_integrate, point_sort, hyperplane_parameters, main_integrate3d, main_integrate, polygon_integrate, lineseg_integrate, integration_reduction, integration_reduction_dynamic, is_vertex
  from sympy.geometry.line import Segment2D
  from sympy.geometry.polygon import Polygon
  from sympy.geometry.point import Point, Point2D
  from sympy.abc import x, y, z
  from sympy.testing.pytest import slow
label_desc: Use image node_id 14 for calling a global function with example usage: test_is_vertex() without return types