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  1. class Foo:
  2.     def __init__(self, values = []):
  3.         self.values = values
  4.  
  5. print(Foo.__init__.__defaults__)
  6.  
  7. a = Foo()
  8. a.values.append(1)
  9.  
  10. print(Foo.__init__.__defaults__)
Success #stdin #stdout 0.01s 27664KB
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([],)
([1],)
https://ideone.com/aSD3mV
language:
Python 3 (python  3.9.5)
created:
6 years ago
visibility:
secret

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