class_docstr: Represents a point in 3-D space.
class_docstr_tok: ["Represents","a","point","in","3-D","space","."]
docstr: Returns the Cartesian/rectangular coordinates of this point
  wrt the origin of the given CoordSys3D instance.
  
  Parameters
  ==========
  
  coordinate_system : CoordSys3D
      The coordinate system to express the coordinates of this
      Point in.
  
  Examples
  ========
  
  >>> from sympy.vector import CoordSys3D
  >>> N = CoordSys3D('N')
  >>> p1 = N.origin.locate_new('p1', 10 * N.i)
  >>> p2 = p1.locate_new('p2', 5 * N.j)
  >>> p2.express_coordinates(N)
  (10, 5, 0)
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code: def express_coordinates(self, coordinate_system):
      """
      Returns the Cartesian/rectangular coordinates of this point
      wrt the origin of the given CoordSys3D instance.
  
      Parameters
      ==========
  
      coordinate_system : CoordSys3D
          The coordinate system to express the coordinates of this
          Point in.
  
      Examples
      ========
  
      >>> from sympy.vector import CoordSys3D
      >>> N = CoordSys3D('N')
      >>> p1 = N.origin.locate_new('p1', 10 * N.i)
      >>> p2 = p1.locate_new('p2', 5 * N.j)
      >>> p2.express_coordinates(N)
      (10, 5, 0)
  
      """
  
      # Determine the position vector
      pos_vect = self.position_wrt(coordinate_system.origin)
      # Express it in the given coordinate system
      return tuple(pos_vect.to_matrix(coordinate_system))
  
file_path: sympy/sympy/vector/point.py
imports: from sympy.core.basic import Basic
  from sympy.core.symbol import Str
  from sympy.vector.vector import Vector
  from sympy.vector.coordsysrect import CoordSys3D
  from sympy.vector.functions import _path
  from sympy.core.cache import cacheit
label_desc: Use image node_id 4 for calling the Point obj's underlying member method code with example usage: obj.express_coordinates(coordinate_system) and returns: tuple