code: def pts_relative(pts=[], shift=[0.0, 0.0], angle=[0.0]):
      '''Convenience shift+rotate combination.
      '''
      assert isinstance(pts, list) and len(pts) > 0
      l_pt_prev = None
      for pt in pts:
          assert isinstance(pt, tuple)
          l_pt = len(pt)
          assert l_pt > 1
          for i in pt:
              assert isinstance(i, float)
          if l_pt_prev is not None:
              assert l_pt == l_pt_prev
          l_pt_prev = l_pt
      assert isinstance(shift, list)
      l_sh = len(shift)
      assert l_sh == l_pt
      for i in shift:
          assert isinstance(i, float)
      assert isinstance(angle, list)
      l_angle = len(angle)
      assert l_angle == l_pt-1
      for i in angle:
          assert isinstance(i, float)
          assert abs(i) <= 2*pi
  
      return [pt_relative(pt, shift, angle) for pt in ptsf pts_relative(pts=[], shift=[0.0, 0.0], angle=[0.0]):
      '''Convenience shift+rotate combination.
      '''
      assert isinstance(pts, list) and len(pts) > 0
      l_pt_prev = None
      for pt in pts:
          assert isinstance(pt, tuple)
          l_pt = len(pt)
          assert l_pt > 1
          for i in pt:
              assert isinstance(i, float)
          if l_pt_prev is not None:
              assert l_pt == l_pt_prev
          l_pt_prev = l_pt
      assert isinstance(shift, list)
      l_sh = len(shift)
      assert l_sh == l_pt
      for i in shift:
          assert isinstance(i, float)
      assert isinstance(angle, list)
      l_angle = len(angle)
      assert l_angle == l_pt-1
      for i in angle:
          assert isinstance(i, float)
          assert abs(i) <= 2*pi
  
      return [pt_relative(pt, shift, angle) for pt in pts]
docs: Convenience shift+rotate combination.