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  1. def find_if(f, col):
  2.     x = list(filter(f, col))
  3.     return col.index(x[0])
  4.  
  5. class Symbol(object):
  6.     strlist = []
  7.     def __init__(self, data):
  8.         try:
  9.             ix = find_if(lambda x: x[0] == str(data), type(self).strlist)
  10.             st, count = type(self).strlist[ix]
  11.             type(self).strlist[ix][1] += 1
  12.             self.__ix = ix
  13.         except IndexError:
  14.             self.__ix = len(type(self).strlist)
  15.             type(self).strlist.append([str(data), 1])
  16.     def __del__(self):
  17.         st, count = type(self).strlist[self.__ix]
  18.         type(self).strlist[self.__ix][1] += 1
  19.         if type(self).strlist[self.__ix][1] == 0:
  20.             del type(self).strlist[self.__ix]
  21.     def __str__(self):
  22.         return type(self).strlist[self.__ix][0]
  23.     def __repr__(self):
  24.         return "{0} <{1}>".format(str(self), id(str(self)))
  25.     def __eq__(self, other):
  26.         return str(self) == str(other)
  27.     def __ne__(self, other):
  28.         return str(self) != str(other)
  29.     def __lt__(self, other):
  30.         return str(self) < str(other)
  31.     def __le__(self, other):
  32.         return str(self) <= str(other)
  33.  
  34. a = Symbol('lol')
  35. b = Symbol('wut')
  36. print(a, id(str(a)))
  37. print(b, id(str(b)))
  38. print('----------------')
  39. x = Symbol('lol')
  40. y = Symbol('wut')
  41. print(x, id(str(x)))
  42. print(y, id(str(y)))
  43. print('----------------')
  44.  
Success #stdin #stdout 0.03s 5908KB
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lol 3074194208
wut 3074194144
----------------
lol 3074194208
wut 3074194144
----------------
https://ideone.com/PnQJc
language:
Python 3 (python  3.12)
created:
14 years ago
visibility:
public

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