Tim*_*ger 5 python iterator loops
我正在用Python实现一个纸牌游戏,为了我的班级来处理玩家PlayerHandler,我最近实现__next__了简单地打电话next_player.因为游戏玩法可以被认为是无限循环(玩家将继续玩,直到他们退出或赢/输),它停止迭代是没有意义的.但是,如果for循环导致无限循环,那么它可能会让人感到困惑,所以我应该在StopIteration某处提升?
class PlayerHandler():
"""Holds and handles players and order"""
def __init__(self, players=None, order=1):
if players is None:
self.players = []
else:
self.players = list(players)
self.current_player = None
self.next_player()
self.order = order
def get_player(self, interval):
assert type(interval) == int, "Key must be an integer!"
if not interval and self.players:
return self.current_player
elif self.players:
step = interval * self.order
index = self.players.index(self.current_player) + step
while index >= len(self.players):
index -= len(self.players)
while index <= -(len(self.players)):
index += len(self.players)
return self.players[index]
else:
raise KeyError("No players in the list!")
def next_player(self):
"""Sets the current player to the next player to play"""
if not self.current_player:
if self.players:
self.current_player = self.players[0]
else:
self.current_player = None
else:
self.current_player = self.get_player(1)
def __iter__(self):
return self
def __next__(self):
self.next_player()
return self.current_player
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重要的是你的代码可读。如果您担心,请添加评论 - 这就是他们的用途!
# Endless loop
for p in players:
# Do game things...
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话虽如此,也许你应该在没有更多玩家时停止迭代。