code: def parametric_region_list(reg):
      """
      Returns a list of ParametricRegion objects representing the geometric region.
  
      Examples
      ========
  
      >>> from sympy.abc import t
      >>> from sympy.vector import parametric_region_list
      >>> from sympy.geometry import Point, Curve, Ellipse, Segment, Polygon
  
      >>> p = Point(2, 5)
      >>> parametric_region_list(p)
      [ParametricRegion((2, 5))]
  
      >>> c = Curve((t**3, 4*t), (t, -3, 4))
      >>> parametric_region_list(c)
      [ParametricRegion((t**3, 4*t), (t, -3, 4))]
  
      >>> e = Ellipse(Point(1, 3), 2, 3)
      >>> parametric_region_list(e)
      [ParametricRegion((2*cos(t) + 1, 3*sin(t) + 3), (t, 0, 2*pi))]
  
      >>> s = Segment(Point(1, 3), Point(2, 6))
      >>> parametric_region_list(s)
      [ParametricRegion((t + 1, 3*t + 3), (t, 0, 1))]
  
      >>> p1, p2, p3, p4 = [(0, 1), (2, -3), (5, 3), (-2, 3)]
      >>> poly = Polygon(p1, p2, p3, p4)
      >>> parametric_region_list(poly)
      [ParametricRegion((2*t, 1 - 4*t), (t, 0, 1)), ParametricRegion((3*t + 2, 6*t - 3), (t, 0, 1)),\
       ParametricRegion((5 - 7*t, 3), (t, 0, 1)), ParametricRegion((2*t - 2, 3 - 2*t),  (t, 0, 1))]
  
      """
      raise ValueError(
          "SymPy cannot determine parametric representation of the region."
      )
  
imports: from functools import singledispatch
  from sympy.core.numbers import pi
  from sympy.functions.elementary.trigonometric import tan
  from sympy.simplify import trigsimp
  from sympy.core import Basic, Tuple
  from sympy.core.symbol import _symbol
  from sympy.solvers import solve
  from sympy.geometry import Point, Segment, Curve, Ellipse, Polygon
  from sympy.vector import ImplicitRegion
label_desc: Use image node_id 1 for calling a global function with example usage: parametric_region_list(reg) without return types