By Lundh F.
Python regular Library is an important advisor 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; facts conversions; threads and procedures; and information storage). you cannot rather application in Python with out utilizing it. during this ebook, writer Fredrik Lundh, author of the Python Imaging Library (PIL), provides confirmed, actual documentation of the entire modules within the Python ordinary Library, in addition to over three hundred annotated instance scripts utilizing the modules.Python normal Library renders this beneficial info in a fresh, easy-to-read structure, but does not speak all the way down to readers. This actual and entire reference documentation is for the Python programmer who desires the proof and little else.The ebook 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 e-book lined what Python clients quite desired to recognize. An previous model of this ebook has been on hand electronically for over a 12 months, so the cloth has been confirmed via Python programmers in real-life applications.This model of Python typical Library covers all of the new modules and comparable details for Python 2.0, the 1st new significant unencumber of Python in 4 years.
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Example 14-16. 14 The dircache Module (Obsolete) The dircache module contains a function to get a list of files in a directory. listdir function in that it keeps a cache to avoid rereading a directory that hasn't been modified. Example 14-17 demonstrates this. Example 14-17. 2) The dircmp module provides a class that can be used to compare the contents of two disk directories, as Example 14-18 shows. Example 14-18. 0 and later, this module has been replaced by filecmp. 9 The UserList Module The UserList module contains a list class that can be subclassed (simply a Python wrapper for the built-in list type).
2 and earlier, the string module uses functions from the strop implementation module where possible. 6 and later, most string operations are made available as string methods as well, as shown in Example 1-52. Many of the functions in the string module are simply wrapper functions that call the corresponding string method. Example 1-52. count("n") upper => MONTY PYTHON'S FLYING CIRCUS lower => monty python's flying circus split => ['Monty', "Python's", 'Flying', 'Circus'] join => Monty+Python's+Flying+Circus replace => Monty Perl's Flying Circus find => 6 -1 count => 3 In addition to the string-manipulation capabilities offered by string, the module also contains a number of functions that convert strings to other types (as Example 1-53 demonstrates).
0 See the Python Library Reference for a full list of functions. 10 The cmath Module The cmath module shown in Example 1-61 contains a number of mathematical operations for complex numbers. Example 1-61. 14159265359 sqrt(-1) => 1j See the Python Library Reference for a full list of functions. 11 The operator Module The operator module provides a "functional" interface to the standard operators in Python. The functions in this module can be used instead of some lambda constructs, when processing data with functions like map and filter.