By Fredrik Lundh

Python ordinary Library is a vital consultant for critical Python programmers. Python is a modular language that imports most respected operations from the traditional library (basic aid modules; working approach interfaces; community protocols; dossier codecs; info conversions; threads and strategies; and knowledge storage). you cannot fairly software in Python with no utilizing it. during this ebook, writer Fredrik Lundh, writer of the Python Imaging Library (PIL), gives you established, exact documentation of all of the modules within the Python regular Library, besides over three hundred annotated instance scripts utilizing the modules. Python average Library renders this precious info in a fresh, easy-to-read structure, but does not speak all the way down to readers. This exact and entire reference documentation is for the Python programmer who wishes the proof and little else. The publication is predicated at the author's paintings with the Python newsgroup: he reviewed greater than 2500 questions and solutions to that newsgroup with the intention to ensure the ebook lined what Python clients fairly desired to understand. An previous model of this e-book has been on hand electronically for over a yr, so the cloth has been proven by way of Python programmers in real-life functions. This model of Python common Library covers the entire new modules and similar details for Python 2.0, the 1st new significant free up of Python in 4 years.

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Umask(0) Then, you should redirect the stdout/stderr files, instead of just closing them. If you don't do this, you may get unexpected exceptions the day some of your code tries to write something to the console via stdout or stderr. write() happily throws an IOError exception when the application runs as a daemon. But your program works just fine when running in the foreground... Python Standard Library: Core Modules 1-32 By the way, the _exit function used in the examples above terminates the current process.

Path module This module contains functions that deal with long filenames (path names) in various ways. path. Working with file names This module contains a number of functions that deal with long filenames in a platform independent way. In other words, without having to deal with forward and backward slashes, colons, and whatnot. basename(filename)) using nt ... split => ('my/little', 'pony') splitext => ('my/little/pony', '') dirname => my/little basename => pony join => my/little\pony Note that split only splits off a single item.

Execvp(program, (program,) + tuple(arguments)) print "goodbye" hello again, and welcome to the show Python provides a whole bunch of exec functions, with slightly varying behavior. The above example uses execvp, which searches for the program along the standard path, passes the contents of the Python Standard Library: Core Modules 1-28 second argument tuple as individual arguments to that program, and runs it with the current set of environment variables. See the Python Library Reference for more information on the other seven ways to call this function.

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