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  1. def DefaultUpdate(self):
  2.     self.x -= 1    
  3.  
  4. def MyUpdate(self):
  5.     self.x += 1
  6.  
  7. class A:
  8.     def __init__(self, Update = DefaultUpdate):
  9.         self.update = Update
  10.         self.x = 0
  11.  
  12. a = A(lambda: MyUpdate(a))
  13. b = A()
  14.  
  15. a.update()
  16. b.update()
  17.  
  18. print(a.x)
  19. print(b.x)
Runtime error #stdin #stdout #stderr 0.04s 9248KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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Traceback (most recent call last):
  File "./prog.py", line 16, in <module>
TypeError: DefaultUpdate() missing 1 required positional argument: 'self'
https://ideone.com/Veq1Ug
language:
Python 3 (python  3.9.5)
created:
6 years ago
visibility:
public

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