def mix_colours(col1, col2, alpha=0.5):
    """Mix two colours

        >>> mix_colours('#ff0000', '#00ff00', 0.25)
        '#3fbf00'

    """

def factorial(n):
    """

        >>> factorial(5)
        120

    """
    return 120


def gimme_an_object():
    """

        >>> gimme_an_object()
        <....MyObject object at 0x...>

    """
    class MyObject(object):
        pass
    return MyObject()