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  1. import pickle
  2.  
  3. class ThingHolder:
  4.     __slots__ = ['thing']
  5.     def __init__(self, thing):
  6.         print(self, thing)
  7.         self.thing = thing
  8.  
  9. th = ThingHolder(None)
  10. th.thing = th
  11.  
  12. th2 = pickle.loads(pickle.dumps(th, pickle.HIGHEST_PROTOCOL))
  13.  
  14. print()
  15. print(th2, th2.thing)
Success #stdin #stdout 0.04s 9900KB
comments (?)
stdin 
Standard input is empty
stdout 
<__main__.ThingHolder object at 0x2b818e827fa8> None

<__main__.ThingHolder object at 0x2b818e8528e8> <__main__.ThingHolder object at 0x2b818e8528e8>
https://ideone.com/ceG42I
language:
Python 3 (python  3.12)
created:
7 years ago
visibility:
public

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