code: def test_unique(self):
      target = (
          [{1: 1, 2: 2}, {3: 3, 4: 4}],
          [{3: 3, 4: 4}, {1: 1, 2: 2}],
      )
  
      assert (
          dedupe.core.unique([{1: 1, 2: 2}, {3: 3, 4: 4}, {1: 1, 2: 2}])
          in target
      )
  
imports: import random
  import unittest
  import numpy
  import scipy.special
  import dedupe
label_desc: Use image node_id 1 for calling the Unique obj's underlying member method code with example usage: obj.test_unique() without return types