code: def test_regular_point():
      r1 = ImplicitRegion((x,), x**2 - 16)
      assert r1.regular_point() == (-4,)
      c1 = ImplicitRegion((x, y), x**2 + y**2 - 4)
      assert c1.regular_point() == (0, -2)
      c2 = ImplicitRegion(
          (x, y), (x - S(5) / 2) ** 2 + y**2 - (S(1) / 4) ** 2
      )
      assert c2.regular_point() == (S(5) / 2, -S(1) / 4)
      c3 = ImplicitRegion((x, y), (y - 5) ** 2 - 16 * (x - 5))
      assert c3.regular_point() == (5, 5)
      r2 = ImplicitRegion(
          (x, y), x**2 - 4 * x * y - 3 * y**2 + 4 * x + 8 * y - 5
      )
      assert r2.regular_point() == (S(4) / 7, S(9) / 7)
      r3 = ImplicitRegion(
          (x, y),
          x**2 - 2 * x * y + 3 * y**2 - 2 * x - 5 * y + 3 / 2,
      )
      raises(ValueError, lambda: r3.regular_point())
  
file_path: sympy/sympy/vector/tests/test_implicitregion.py
imports: from sympy.core.relational import Eq
  from sympy.core.singleton import S
  from sympy.abc import x, y, z, s, t
  from sympy.sets import FiniteSet, EmptySet
  from sympy.geometry import Point
  from sympy.vector import ImplicitRegion
  from sympy.testing.pytest import raises
label_desc: Use image node_id 2 for calling a global function with example usage: test_regular_point() without return types