code: def define_graph(self):
      self.data = self.input()
      flipped = self.python_flip(
          self.data, self.coin(), self.coin(), self.coin()
      )
      return flipped
  
imports: from nvidia.dali.pipeline import Pipeline
  import nvidia.dali.ops
  import nvidia.dali.types
  import numpy
  import os
  from test_utils import compare_pipelines
  from test_utils import RandomDataIterator
  from test_utils import get_dali_extra_path
label_desc: Use image node_id 2 for calling the SynthPythonFlipPipeline obj's underlying member method code with example usage: obj.define_graph() and returns: flipped