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  1. class NotBolsheError(Exception):
  2.     def __init__(self):
  3.         pass
  4.  
  5. class ImprovedMensheMixin:
  6. 	def menshe(self, is_a):
  7. 	    is_ravno = False
  8. 	    try:
  9. 	        is_ravno = self.ravno(is_a)
  10. 	    except NotBolsheError:
  11. 	        # Safe to return true there.
  12. 	        return True
  13. 	    else:
  14. 	        raise NotBolsheError 
  15.  
  16. class BolsheMensher(ImprovedMensheMixin):
  17.     def __init__(self, a, b):
  18.         self.a = a
  19.         self.b = b
  20.  
  21.     def __str__(self):
  22.         try:
  23.             self.menshe(is_a=True)
  24.         except NotBolsheError:
  25.             try:
  26.                 self.menshe(is_a=False)
  27.             except NotBolsheError:
  28.                 return 'A ravno B'
  29.             else:
  30.                 return 'A bolshe B'
  31.         else:
  32.             return 'A menshe B'
  33.  
  34.     def _set_operands(self, is_a):
  35.         return (self.a, self.b) if is_a else (self.b, self.a)
  36.  
  37.     def bolshe(self, is_a):
  38.         a, b = self._set_operands(is_a)
  39.         if a > b:
  40.             return True
  41.         raise NotBolsheError
  42.  
  43.     def ravno(self, is_a):
  44.         a, b = self._set_operands(is_a)
  45.         if a == b:
  46.             return True
  47.         self.bolshe(is_a)
  48.  
  49.     def menshe(self, is_a):
  50.         '''Wrapper over bolshe and ravno methods for user convenience.'''
  51.         is_ravno = False
  52.         try:
  53.             is_ravno = self.ravno(is_a)
  54.         except NotBolsheError:
  55.             # Safe to return true there.
  56.             return True
  57.         else:
  58.             raise NotBolsheError
  59.  
  60.  
  61.  
  62. print(BolsheMensher(6, 4))
  63. print(BolsheMensher(4, 4))
  64. print(BolsheMensher(4, 6))
Success #stdin #stdout 0.01s 47720KB
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A bolshe B
A ravno B
A menshe B
https://ideone.com/JpgnFs
language:
Python (PyPy 2.7.13)
created:
7 years ago
visibility:
public

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