code: def test_pickle(self):
      x = poly.Polynomial([1, 2, 3])
      y = pickle.loads(pickle.dumps(x))
      assert_equal(x, y)
  
imports: from functools import reduce
  from fractions import Fraction
  import numpy
  import numpy.polynomial.polynomial
  import pickle
  from copy import deepcopy
  from numpy.testing import assert_almost_equal, assert_raises, assert_equal, assert_, assert_array_equal, assert_raises_regex
label_desc: Use image node_id 6 for calling the TestConstants obj's underlying member method code with example usage: obj.test_pickle() without return types