code: def _generator_backcompatibility(op):
      r"""Preserve backwards compatibility behaviour for PennyLane
      versions <=0.22, where generators returned List[type or ndarray, float].
      This function raises a deprecation warning, and converts to the new
      format where an instantiated Operator is returned."""
      warnings.warn(
          "The Operator.generator property is deprecated. Please update the operator so that "
          "\n\t1. Operator.generator() is a method, and"
          "\n\t2. Operator.generator() returns an Operator instance representing the operator.",
          qml.PennyLaneDeprecationWarning,
      )
      gen = op.generator
  
      if inspect.isclass(gen[0]):
          return gen[1] * gen[0](wires=op.wires)
  
      if isinstance(gen[0], np.ndarray) and len(gen[0].shape) == 2:
          return gen[1] * qml.Hermitian(gen[0], wires=op.wires)
  
      raise qml.operation.GeneratorUndefinedError
  
file_path: pennylane/pennylane/ops/functions/generator.py
imports: import inspect
  import warnings
  import numpy
  import pennylane
  from pennylane.ops import Hamiltonian, SProd, Prod, Sum
label_desc: Use image node_id 3 for calling a global function with example usage: _generator_backcompatibility(op) and returns: unknown, unknown