code: def define_graph(self):
      return (
          self.const1(),
          self.const2(),
          self.const3(),
          self.const4(),
          self.const5(),
          self.const6(),
          self.const7(),
      )
  
imports: import numpy
  import nvidia.dali
  import nvidia.dali.fn
  import nvidia.dali.ops
  import nvidia.dali.types
  import os
  from nvidia.dali import Pipeline
  from test_utils import check_batch
  from test_utils import get_dali_extra_path
label_desc: Use image node_id 2 for calling the ConstantPipeline obj's underlying member method code with example usage: obj.define_graph() and returns: self,  self,  self,  self,  self,  self,  self