code: def generate_input(self, a_shape, y_shape, xp, dtype):
      a = testing.shaped_arange(a_shape, xp, dtype)
      y = None
      if y_shape is not None:
          y = testing.shaped_arange(y_shape, xp, dtype)
      return a, y
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestCov obj's underlying member method code with example usage: obj.generate_input(a_shape, y_shape, xp, dtype) and returns: a,  y