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The result will be like below

Result 

{'Jake', 'Eric', 'Jill'}

{'Eric', 'Jake', 'Jill'}


Find different elements from two arrays based on "difference" method

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The result will be like below

Result 

{'Jake', 'Eric'}

{'Jill'}


Find different elements from two arrays based on "union" method

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The result will be like below

Result 

{'John', 'Eric', 'Jake', 'Jill'}


Print out a set containing all the participants from event A which did not attend event B

Code Block
a = ["Jake", "John", "Eric"]
b = ["John", "Jill"]

print(set(a).difference(set(b)))