code: def __init__(self, aggr="add"):
      self.aggr = aggr
      assert self.aggr in ["add", "mean", "max"]
  
file_path: euler/tf_euler/python/convolution/conv.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import sys
  import inspect
  import tensorflow
  from tf_euler.python.euler_ops import mp_ops
label_desc: Use image node_id 1 to create a new Conv object from inherited base classes: object with example: obj = Conv(aggr)