MySetOperations is a collection of functions, on which the following set operati

Question

MySetOperations is a collection of functions, on which the following set operations are defined:

myIsEmpty(A): Returns T if the set A is empty (A = ), F otherwise. myDisjoint(A,B): Returns T if intersection of the set A and set B is non-empty (A B ), F otherwise.

myIntersection(A,B): Returns the intersection of the set A and set B (A B).

myUnion(A,B): Returns the union of the set A and set B (A B).

myDifference(A,B): Returns the complement of the set A and set B (A B).

mySymDifference(A,B): Returns the symmetric difference of the set A and set B (A B).

Write a new collection of MySetOperations in Python only using the standard flow Python’s instructions and the set build-in operations: in, not in, and add.

Explanation / Answer

class MySetOperations:
   def myIsEmpty(self,A):
       if len(A):
           return False
       return True
   def myDisjoint(self,A,B):

       C= A&B
       if len(C):
           return False
       return True
   def myIntersection(self,A,B):
       return A&B
   def myUnion(self,A,B):
       return A | B
   def myDifference(self,A,B):
       return A-B
   def mySymDifference(self,A,B):
       return A^B

ob=MySetOperations()
A = {1, 2, 3, 4, 5}
B = {4, 5, 6, 7, 8}
print ob.myIsEmpty(A)
print ob.myDisjoint(A,B)
print ob.myIntersection(A,B)
print ob.myUnion(A,B)
print ob.myDifference(A,B)
print ob.mySymDifference(A,B)

===================================

Output:

akshay@akshay-Inspiron-3537:~$ python setop.py
False
False
set([4, 5])
set([1, 2, 3, 4, 5, 6, 7, 8])
set([1, 2, 3])
set([1, 2, 3, 6, 7, 8])

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