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  1. class Example:
  2.   def __init__(self, number):
  3.     self.number = number
  4.  
  5.   def __add__(self, other):
  6.     return Example(self.number + other.number)
  7.  
  8.   def __sub__(self, other):
  9.     return self.number - other.number
  10.  
  11.   def doSmth(self):
  12.     print(self.number)
  13.  
  14. a = Example(7)
  15. b = Example(42)
  16.  
  17. c = a + b
  18. d = a - b
  19.  
  20. c.doSmth()
  21. d.doSmth()
Runtime error #stdin #stdout #stderr 0.14s 23704KB
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stdin
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Standard input is empty
stdout
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49
stderr
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Traceback (most recent call last):
  File "./prog.py", line 21, in <module>
AttributeError: 'int' object has no attribute 'doSmth'
https://ideone.com/CnrZDS
language:
Python 3 (python  3.9.5)
created:
3 years ago
visibility:
public

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