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  1. class X:
  2.     def __bool__(self):
  3.         return False
  4.  
  5. x = X()
  6.  
  7. print(not x)
  8. print(x == None)
  9.  
  10. class Y:
  11.     def __eq__(self, other):
  12.         return True
  13.  
  14. y = Y()
  15.  
  16. print(not y)
  17. print(y == None)
Success #stdin #stdout 0.06s 9568KB
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Standard input is empty
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True
False
False
True
https://ideone.com/t9yWj8
language:
Python 3 (python  3.9.5)
created:
10 years ago
visibility:
public

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