code: def __iter__(self):
      self.it = iter(self.source)
      return self
  
imports: from enum import Enum
  from nvidia.dali import types
  from nvidia.dali import tensors
  import inspect
  import functools
label_desc: Use image node_id 2 for calling the _CycleIter obj's underlying member method code with example usage: obj.__iter__() and returns: self