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? 9. Os.path.exists ()--Verifies that the specified object exists. True, otherwise False. Example:等天子进入大殿，方才按部就班，鱼贯而入，跪下山呼万岁。小有名气的惊悚小说作家苔丝·索恩（玛丽亚·贝罗 Maria Bello 饰）受邀去某地进行演讲，人生地不熟的她迷失方向，汽车还在某个根本没有手机信号的地方爆胎。当她手足无措的时候，孔武健壮的卡车司机（威尔·哈里斯 Will Harris 饰）出现答应帮她更换轮胎，然而这个暴徒见色起意，对苔丝进行了残酷的虐待，还把她丢在了一个浸泡着三四具女性尸体的坑道中。侥幸逃命的苔丝一路跌跌撞撞回到家中，她曾尝试报警，却最终三缄其口。在接下来的日子里，苔丝从混乱中理清头绪，她决定用自己的方式向那只禽兽展开报复…… 
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