1_python期末重点

   a = 10

    b = 20

    a, b = b, a

    print(a, b)

numbers = [1, 2, 3, 4, 5]

    result = [x for x in numbers if x % 2 == 0]

    print(result)

  x = 5

    while x > 0:

        print(x, end=' ')

        x -= 1

        if x == 2:

            break