quantum-espresso/PP/examples/exx_interpolated_bands_example/pbe_idw/idw.in

&INTERPOLATION 
  method = 'idw'
  p_metric = 7
/
K_POINTS tpiba_b
 5
  0.00  0.00  0.00 10
  1.00  0.00  0.00 10
  1.00  0.25  0.25 10
  0.50  0.50  0.50 10
  0.00  0.00  0.00 2