code: def __init__(self, capacity):
      super(SumSegmentTree, self).__init__(
          capacity=capacity, operation=operator.add, neutral_element=0.0
      )
  
imports: import argparse
  import operator
  import os
  import random
  import time
  import gym
  import matplotlib.pyplot
  import numpy
  import tensorflow
  import tensorlayer
label_desc: Use image node_id 1 to create a new SumSegmentTree object from inherited base classes: SegmentTree with example: obj = SumSegmentTree(capacity)