Python:如何使用epytext记录返回多个值时的返回值?

一个简单的函数:

def foo():
    a = 1
    b = 2
    return a, b

如何使用epytext样式记录(多个)返回值?

def foo():
    """
    This function
    @return (a, b): a tuple of a and b representing...
    """
    a = 1
    b = 2
    return a, b

或单独使用 @return 每个变量的标签?(这是否“合法”?)

def foo():
    """
    This function
    @return a: a int representing...
    @return b: a int representing...
    """
    a = 1
    b = 2
    return a, b