Python循环调用冻结

Question

我试图创建一个游戏服务器学习的目的，我遇到了一个问题，我的更新功能，每（0.05）秒运行，是没有调用任何函数传递变量。你知道吗

def update(self):
    print("Match update: %s" % (str(self)))
    if (self.pendingShutdown):
        cancelShutdown = True
        for player in self.players:
            if player.protocol == None:
                cancelShutdown  = False
        if (time() > self.shutdownTime):
            print("Time elapsed, shutting down match")
            #self.quit()
    else:
        self.sendlocations()
def sendlocations(self):
    print("ran new send locations")
    for player in self.players:
        print(player.posX)
        for r in range(0, len(self.players)):
            matchPlayer = self.players[r]
            #equation for distance between players
            x = (player.posX - matchPlayer.posX)**2
            y = (player.posY - matchPlayer.posY)**2
            distance = math.sqrt(x+y)
            #ending equation
            if (distance <= 1000):
                if (matchPlayer.protocol):
                    #finding the player index(SENDING PLAYER)
                    index = 0
                    for i in matchPlayer.match.players:
                        if(i.playerId == player.playerId):
                            matchPlayer.protocol.sendPlayerMoved(index, player.posX, player.posY, player.posZ)
                        index = index + 1
                        print("Player moved %s " % (index))
def sendPlayerMoved(self, playerIndex, posX, posY, posZ):
    message = MessageWriter()
    message.writeByte(MESSAGE_PLAYER_MOVED)
    message.writeInt(playerIndex)
    message.writeInt(posX)
    message.writeInt(posY)
    message.writeInt(posZ)
    #self.log("Sent PLAYER_MOVED %d %d" % (playerIndex, posX))
    self.sendMessage(message)

我可以打电话给你“self.sendlocations文件（）“当我没有通过行时，if（distance<；=） 该函数正确地打印出“runnewsendlocations”行，但是添加了这一行之后，就不再打印了。添加行之后，“update”函数也会冻结。我不知道为什么会这样。你知道吗