fork(1) download 
  1. import pickle
  2.  
  3. class ThingHolder:
  4.     __slots__ = ['thing']
  5.     def __init__(self, thing):
  6.         print(self, thing)
  7.         self.thing = thing
  8.     def __reduce__(self):
  9.         return (ThingHolder, (self.thing,))
  10.  
  11. th = ThingHolder(None)
  12. th.thing = th
  13.  
  14. th2 = pickle.loads(pickle.dumps(th, pickle.HIGHEST_PROTOCOL))
  15.  
  16. print(th2, th2.thing)
Runtime error #stdin #stdout #stderr 0.05s 10216KB
comments (?)
stdin 
Standard input is empty
stdout 
<__main__.ThingHolder object at 0x2b0f43241408> None
stderr 
Traceback (most recent call last):
  File "./prog.py", line 14, in <module>
RecursionError: maximum recursion depth exceeded while calling a Python object
https://ideone.com/sHlKmb
language:
Python 3 (python  3.12)
created:
7 years ago
visibility:
public

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