code: def __init__(self):
      self.cycle = self
  
imports: import unittest
  from weakref import WeakSet
  import copy
  import string
  from collections import UserString
  from collections.abc import Set, MutableSet
  import gc
  import contextlib
  from test import support
label_desc: Use image node_id 1 to create a new RefCycle object  with example: obj = RefCycle()