code: def pt_reflect(pt=(0.0, 0.0), plane=[None, None]):
      '''Return given point reflected around planes in N dimensions.
  There must be the same number of planes as dimensions, but the value of each
    plane may be None to indicate no reflection.
      '''
      assert isinstance(pt, tuple)
      l_pt = len(pt)
      assert l_pt > 1
      for i in pt:
          assert isinstance(i, float)
      assert isinstance(plane, list)
      l_pl = len(plane)
      assert l_pl == l_pt
      for i in plane:
          assert isinstance(i, float) or i is None
  
      return tuple([pt[i] if plane[i] is None else (2*plane[i] - pt[i]) for i in range(l_pt)]f pt_reflect(pt=(0.0, 0.0), plane=[None, None]):
      '''Return given point reflected around planes in N dimensions.
  There must be the same number of planes as dimensions, but the value of each
    plane may be None to indicate no reflection.
      '''
      assert isinstance(pt, tuple)
      l_pt = len(pt)
      assert l_pt > 1
      for i in pt:
          assert isinstance(i, float)
      assert isinstance(plane, list)
      l_pl = len(plane)
      assert l_pl == l_pt
      for i in plane:
          assert isinstance(i, float) or i is None
  
      return tuple([pt[i] if plane[i] is None else (2*plane[i] - pt[i]) for i in range(l_pt)])
docs: Return given point reflected around planes in N dimensions.
  There must be the same number of planes as dimensions, but the value of each
    plane may be None to indicate no reflection.