#example_1
numbers = [1, 2, 3, 4]
squares = [n**2 for n in numbers]

>> squares
[1, 4, 9, 16]

#example_2
obj = ["Even" if i%2==0 else "Odd" for i in range(5)]

>> obj
['Even', 'Odd', 'Even', 'Odd', 'Even']

#example_3
matrix = [[1, 2],[3,4],[5,6],[7,8]]
transpose = [[row[i] for row in matrix] for i in range(2)]

>> transpose
[[1, 3, 5, 7], [2, 4, 6, 8]]