code: def testSamplePairWithUnevenProbabilitiesWithQueryValue(self):
      self._tree.set(node_index=2, value=1.0)
      self._tree.set(node_index=3, value=3.0)
  
      for _ in range(10000):
          self.assertEqual(self._tree.sample(query_value=0.1), 2)
  
imports: import random
  import unittest
  from reagent.replay_memory import sum_tree
label_desc: Use image node_id 12 for calling the SumTreeTest obj's underlying member method code with example usage: obj.testSamplePairWithUnevenProbabilitiesWithQueryValue() without return types