code: def arg_scope_func_key(op):
      return getattr(op, "_key_op", str(op))
  
file_path: tflearn/tflearn/vendor/arg_scope.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensorflow.python.util import tf_contextlib
  from tensorflow.python.util import tf_decorator
label_desc: Use image node_id 3 for calling a global function with example usage: arg_scope_func_key(op) and returns: getattr