python - 在 Python 的 while 循环中调用一个函数，并将其先前的返回值作为参数

Question

我需要继续调用以下函数，并将其先前的返回值作为 while 循环中的参数：

def announce_lead_changes(last_leader=None):
    """Return a commentary function that announces lead changes.

    >>> f0 = announce_lead_changes()
    >>> f1 = f0(5, 0)
    Player 0 takes the lead by 5
    >>> f2 = f1(5, 12)
    Player 1 takes the lead by 7
    >>> f3 = f2(8, 12)
    >>> f4 = f3(8, 13)
    >>> f5 = f4(15, 13)
    Player 0 takes the lead by 2
    """
    def say(score0, score1):
        if score0 > score1:
            leader = 0
        elif score1 > score0:
            leader = 1
        else:
            leader = None
        if leader != None and leader != last_leader:
            print('Player', leader, 'takes the lead by', abs(score0 - score1))
        return announce_lead_changes(leader)
    return say

我了解 doctest 的工作原理，但是如何在 while 循环中实现它？我尝试了以下方法，但它继续在整个循环中传递默认参数：

commentary = both(say_scores, announce_lead_changes())
while
    ...
    commentary(score0, score1)

标签： python

Answer 1

更新commentarywhile 循环中的每次迭代。尝试 ：

commentary = both(say_scores, announce_lead_changes())
while
    ...
    commentary = commentary(score0, score1)