code: def apply_label(node):
      """Return label of apply node."""
      return node.op.__class__.__name__
  
imports: import os
  from functools import reduce
  import numpy
  import pytensor
  from pytensor.compile import Function, builders
  from pytensor.graph.basic import Apply, Constant, Variable, graph_inputs
  from pytensor.graph.fg import FunctionGraph
  from pytensor.printing import pydot_imported, pydot_imported_msg
label_desc: Use image node_id 3 for calling a global function with example usage: apply_label(node) and returns: node