>>> [x for x in range(10)]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

>>> [f'{x} * {y} = {x * y}' for x in range(2, 10) for y in range(2, 10)]
['2 * 2 = 4',
 '2 * 3 = 6',
 '2 * 4 = 8',
 '2 * 5 = 10',
 '2 * 6 = 12',
 '2 * 7 = 14',
 '2 * 8 = 16',
 '2 * 9 = 18',
 '3 * 2 = 6',
 '3 * 3 = 9',
 '3 * 4 = 12',
 '3 * 5 = 15',
 '3 * 6 = 18',
 '3 * 7 = 21',
...
 '9 * 7 = 63',
 '9 * 8 = 72',
 '9 * 9 = 81']

>>> [x for x in range(10) if x % 2 == 0]
[0, 2, 4, 6, 8]

>>> [(x, y) for x in 'ABC' for y in [1, 2, 3]]
[('A', 1),
 ('A', 2),
 ('A', 3),
 ('B', 1),
 ('B', 2),
 ('B', 3),
 ('C', 1),
 ('C', 2),
 ('C', 3)]

>>>  { x for x in range(10) }
{0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

>>> { str(x): x for x in range(10) }
{'0': 0,
 '1': 1,
 '2': 2,
 '3': 3,
 '4': 4,
 '5': 5,
 '6': 6,
 '7': 7,
 '8': 8,
 '9': 9}

>>> gen = (x for x in range(10))
>>> type(gen)
generator
>>> gen.__next__()
0
>>> gen.__next__()
1
>>> for e in gen:
        print(e)
2
3
4
5
6
7
8
9