code: def _connect_name(lhs_name, rhs_name):
      if not lhs_name:
          return rhs_name
      if not rhs_name:
          return lhs_name
      return "{}_{}".format(lhs_name, rhs_name)
  
imports: import six
  import tensorflow
  import numpy
  from texar.tf.utils import utils
label_desc: Use image node_id 4 for calling a global function with example usage: _connect_name(lhs_name, rhs_name) and returns: str, rhs_name, lhs_name