[英]Calling a function with its previous return value as an argument in a while loop in Python
我需要繼續調用以下 function 及其先前的返回值作為 while 循環中的參數:
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 循環中實現它? 我嘗試了以下方法,但它繼續在整個循環中傳遞默認參數:
commentary = both(say_scores, announce_lead_changes())
while
...
commentary(score0, score1)
更新 while 循環中每次迭代的commentary
。 嘗試:
commentary = both(say_scores, announce_lead_changes())
while
...
commentary = commentary(score0, score1)
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