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  1. class Set:
  2.  
  3.     arr = []
  4.  
  5.     def __init__(self, lista):
  6.  
  7.         self.arr = lista
  8.  
  9.     def __xor__(self, other):
  10.  
  11.         r1 = self - other
  12.         r2 = other - self
  13.         return Set(r1 + r2)
  14.  
  15.     def __and__(self, other):
  16.  
  17.         r = []
  18.         for i in self.arr:
  19.             found = False
  20.             for j in other.arr:
  21.                 if i == j:
  22.                    found = True
  23.             if found is True:
  24.                r.append(i)
  25.         return r
  26.  
  27.     def __add__(self, other):
  28.  
  29.         r = []
  30.         for i in other.arr:
  31.             r.append(i)
  32.  
  33.         for i in self.arr:
  34.             found = False
  35.             for j in other.arr:
  36.                 if i == j:
  37.                    found = True
  38.             if found is False:
  39.                 r.append(i)
  40.         return r
  41.  
  42.     def __sub__(self, other):
  43.  
  44.         r = []
  45.         for i in self.arr:
  46.             found = False
  47.             for j in other.arr:
  48.                 if i == j:
  49.                    found = True
  50.             if found is False:
  51.                 r.append(i)
  52.         return r
  53.  
  54.     def contains(self, x):
  55.         found = False
  56.         for i in self.arr:
  57.             if i == x:
  58.                found = True
  59.         return found
  60.  
  61.     def __str__(self):
  62.         return str(self.arr)
  63.  
  64. ob1 = Set([0,1,2,3,4,5,-1])
  65. ob2 = Set([5,6,7,8,9,0])
  66. ob3 = ob1 - ob2
  67. ob33 = ob2 - ob1
  68. ob4 = ob1 + ob2
  69. ob5 = ob1 & ob2
  70. ob6 = ob1 ^ ob2
  71. print(type(ob6))
  72. print("A = ", ob1)
  73. print("B = ", ob2)
  74. print("Difference A - B: ", ob3)
  75. print("Difference B - A: ", ob33)
  76. print("Union:", ob4)
  77. print("Intersection: ", ob5)
  78. print(ob2.contains(1))
  79. print("Symmetric Diff: ", ob6)
  80.  
Success #stdin #stdout 0.03s 9016KB
comments (?)
stdin 
Standard input is empty
stdout 
<class '__main__.Set'>
A =  [0, 1, 2, 3, 4, 5, -1]
B =  [5, 6, 7, 8, 9, 0]
Difference A - B:  [1, 2, 3, 4, -1]
Difference B - A:  [6, 7, 8, 9]
Union: [5, 6, 7, 8, 9, 0, 1, 2, 3, 4, -1]
Intersection:  [0, 5]
False
Symmetric Diff:  [1, 2, 3, 4, -1, 6, 7, 8, 9]
https://ideone.com/qkvJuE
Set Theory.
language:
Python 3 (python  3.9.5)
created:
3 years ago
visibility:
secret

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