sing a song
    hehe

    :param a: I'm a
    :param b: I'm b
    :param c: I'm c
    :param name: I'm name

def sing(a, b, c=False, name='yetone'):
    """sing a song
    hehe

    :param a: I'm a
    :param b: I'm b
    :param c: I'm c
    :param name: I'm name
    """
    print('test0.sing: <a: {}, b: {}, c: {}> by {}'.format(a, b, c, name))