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NodeB. Add (nodeC);When Python is programmed, it often deals with files and directories, which cannot be separated from OS modules. The OS module contains common operating system functions, independent of the specific platform. The following is a list of commonly used commands「特工」这个词让你想起了什么？英俊？潇洒？耍酷？身手不凡？你听说过特工活吃蝎子的事情没有？这种事情就发生在4月1日播出的CBS新剧《混沌特工组》（CHAOS）中。有渡口还能搜罗道足够的船只，不得不防啊？董翳叹道：是啊，当务之急是把他们阻拦在大河之北，只要他逃不掉，就有机会将其消灭之。……半个月后，东南又来了新变动。In the school, there is only an atmosphere of learning. After all, the school is a place of learning. Every student is working hard to achieve higher results. No matter studying or working, there is competition. In the competition, we must constantly learn from other people's advanced places and how others are to be human, so as to improve our potential. I remember the teacher said before that the university is a small society, but I always feel that the innocence and sincerity are indispensable in the campus. Although it is a university, the students still continue to be students. Contact those senior students who have just graduated, they always team me and say that they should cherish their time at school. In this practice, I feel very deeply that in school, there are a lot of theoretical studies, and they are multi-faceted, almost all-encompassing. However, in actual work, one may encounter the situation that one has not learned from books, or that one may not use the knowledge from books at all.