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<h3>Operating System Services</h3>
<p>The modules in this section provide access to a wide variety of operating system services with an emphasis on file, process, and terminal management.</p>
<P><I>Note:</I> A general familiarity with basic operating system concepts is assumed in this section. Furthermore, a number of modules provide advanced functionality which is beyond the scope of this book to introduce, but which is presented for readers who know what they抮e doing.</P>
<p>Most of Python抯 operating system modules are based on POSIX interfaces. POSIX is a standard that defines a core set of operating system interfaces. Most UNIX systems support POSIX, and other platforms such as Windows and Macintosh support large portions of the interface.</p>
<p>Readers may want to supplement the material presented here with additional references. <i>The C Programming Language, Second Edition</I> by Brian W. Kernighan and Dennis M. Ritchie (Prentice Hall, 1989, ISBN 0-13-110362-8) provides a good overview of files, file descriptors, and the low-level interfaces on which many of the modules in this section are based. More advanced readers may want to consult a book such as W. Richard Stevens⌨️ 快捷键说明
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