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# set comprihension
{i+1 for i in range(20)}
{(i,j) for j in range(4,7) for i in range(6,8)}
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>>> a = {x for x in 'abracadabra' if x not in 'abc'}
>>> a
{'r', 'd'}
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# Create a set of squares of numbers from 1 to 10
squares = {x**2 for x in range(1, 11)}
print(squares)