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14. Os.path.getsize ()--Gets the size of the file and returns 0 if it is a directory南雀军死了七人，只有一人逃走，他还中了秦淼一剑，怕是回去也活不常。Same as the above measurement parts!讲述了退休的体校滑冰教练张胜利，带领着一群非专业的少年们，组建“民间短道速滑队”征战赛场的故事。在他的带领下，几个迷茫的年轻人受到了竞技体育精神的感召，找到了人生的意义，扬帆起航。剧集的故事主要发生在某个不定的历史年代，地点是虚构的邻近京城的下河县里的“清明酒家”。故事围绕精明能干的孙掌柜（谢园饰演），自命不凡的张郎，油滑机灵的刘三儿和孙掌柜嫁不出来的女儿如花展开，同时带入他们身边的形形色色的人物，如常常来“清明酒家”走动的下河县师爷苏东（游本昌饰演），时不时来传传小道消息的“退休干部”周员外。形形色色的人因为这样那样的原因和别人打着交道，因为情感、原则、利益、地位、风俗等说大不大说小不小的问题产生矛盾，产生笑话。日复一日，家长里短，意料之外，情理之中，折射出的却是人情冷暖，是是非非。For codes of the same length, theoretically, the further the coding distance between any two categories, the stronger the error correction capability. Therefore, when the code length is small, the theoretical optimal code can be calculated according to this principle. However, it is difficult to effectively determine the optimal code when the code length is slightly larger. In fact, this is an NP-hard problem. However, we usually do not need to obtain theoretical optimal codes, because non-optimal codes can often produce good enough classifiers in practice. On the other hand, it is not that the better the theoretical properties of coding, the better the classification performance, because the machine learning problem involves many factors, such as dismantling multiple classes into two "class subsets", and the difficulty of distinguishing the two class subsets formed by different dismantling methods is often different, that is, the difficulty of the two classification problems caused by them is different. Therefore, one theory has a good quality of error correction, but it leads to a difficult coding for the two-classification problem, which is worse than the other theory, but it leads to a simpler coding for the two-classification problem, and it is hard to say which is better or weaker in the final performance of the model.