code: def test_string_aliases_6(self, xp, scp):
      x, _ = self.get_xy(xp)
  
      # string aliases are handled for 2D values
      yy = xp.c_[xp.sin(x), xp.cos(x)]
      der_l = [(1, [0.0, 0.0])]
      der_r = [(2, [0.0, 0.0])]
  
      b2 = scp.interpolate.make_interp_spline(
          x, yy, k=3, bc_type=(der_l, der_r)
      )
      b1 = scp.interpolate.make_interp_spline(
          x, yy, k=3, bc_type=("clamped", "natural")
      )
      return b1.c, b2.c
  
imports: import pytest
  import cupy
  from cupy import testing
  from cupy.cuda import runtime
  import numpy
  import cupyx.scipy.interpolate
label_desc: Use image node_id 29 for calling the TestInterp obj's underlying member method code with example usage: obj.test_string_aliases_6(xp, scp) and returns: b1,  b2