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  1. class NotBolsheError(Exception):
  2.     def __init__(self):
  3.         pass
  4.  
  5.  
  6. class BolsheMensher(object):
  7.     def __init__(self, a, b):
  8.         self.a = a
  9.         self.b = b
  10.  
  11.     def __str__(self):
  12.         try:
  13.             self.menshe(is_a=True)
  14.         except NotBolsheError:
  15.             try:
  16.                 self.menshe(is_a=False)
  17.             except NotBolsheError:
  18.                 return 'A ravno B'
  19.             else:
  20.                 return 'A bolshe B'
  21.         else:
  22.             return 'A menshe B'
  23.  
  24.     def _set_operands(self, is_a):
  25.         return (self.a, self.b) if is_a else (self.b, self.a)
  26.  
  27.     def bolshe(self, is_a):
  28.         a, b = self._set_operands(is_a)
  29.         if a > b:
  30.             return True
  31.         raise NotBolsheError
  32.  
  33.     def ravno(self, is_a):
  34.         a, b = self._set_operands(is_a)
  35.         if a == b:
  36.             return True
  37.         self.bolshe(is_a)
  38.  
  39.     def menshe(self, is_a):
  40.         '''Wrapper over bolshe and ravno methods for user convenience.'''
  41.         is_ravno = False
  42.         try:
  43.             is_ravno = self.ravno(is_a)
  44.         except NotBolsheError:
  45.             # Safe to return true there.
  46.             return True
  47.  
  48.         if is_ravno:
  49.             # Return NotBolsheError since it is also a case.
  50.             raise NotBolsheError
  51.         return True
  52.  
  53.  
  54. print(BolsheMensher(6, 4))
  55.  
Success #stdin #stdout 0.01s 47720KB
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A menshe B
https://ideone.com/Dgy4B0
language:
Python (PyPy 2.7.13)
created:
7 years ago
visibility:
public

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