code: def test_unwrap_2dim_with_period(self, xp, dtype):
      a = testing.shaped_random((4, 5), xp, dtype)
      return xp.unwrap(a, axis=1, period=4.5)
  
imports: import unittest
  from cupy import testing
label_desc: Use image node_id 8 for calling the TestUnwrap obj's underlying member method code with example usage: obj.test_unwrap_2dim_with_period(xp, dtype) and returns: xp