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Safari | Python Developer's Handbook -> Undocumented Modules





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Undocumented Modules

Currently, the modules listed in this section don't have any official documentation. However, you might find some information about them in this book, by browsing an updated version of the online library reference, or by checking some other Web site.

Frameworks

The next modules represent some Python frameworks that don't have any official documentation yet.

Tkinter This module allows you to create GUIs (graphical user interfaces) because it implements an interface to the Tcl/Tk windowing libraries (see Chapter 15, "Tkinter," for details).

Tkdnd This module provides drag-and-drop support for Tkinter.

test This package is responsible for the regression-testing framework.

Miscellaneous Useful Utilities

At this time this book went to press, the following modules didn't have any official documentation.

dircmp

This module defines a class on which to build directory comparison tools.

tzparse

This module is an unfinished work to parse a time zone specification.

ihooks

The ihooks module is a framework that manages the co-existence of different import routines.

Platform Specific Modules

These are implementation details of the os module.

dospath, macpath, posixpath, ntpath

These modules are for their platforms what the os.path module is for the UNIX platform. They can all be used by any platform in order to handle pathnames of different platforms.

Multimedia

At the time this book went to press, the following modules didn't have any official documentation.

						
audiodev, sunaudio, toaiff

					

Obsolete

The following modules became obsolete as of release 1.6:

stdwin, soundex, cml, cmpcache, dircache, dump, find, grep, packmail, poly, zmod, strop, util, and whatsound.

Note that release 2.0 hasn't made any module obsolete. All modules that were replaced were moved to the lib-old subdirectory of the distribution. That list, includes: cmp, cmpcache, dircmp, dump, find, grep, packmail, poly, util, whatsound, zmod.

ni

Before version 1.5a4, the ni module was used to support import package statements.

dump

The dump module prints the definition of a variable. Note that this module can be substituted for the pickle module.

							
>>> import dump
>>> var = (10, 20, 30, 40)
>>> dump.dumpvar("newvar", var)
newvar = (10, 20, 30, 40) 

						

Extension Modules

The following modules are obsolete tools to support GUI implementations.

stdwin This module provides an interface to the obsolete STDWIN. STDWIN is an unsupported platform-independent GUI interface that was replaced by Tkinter.

stdwinevents Interacts with the stdwin module by providing piping services.

New Modules on Python 2.0

Next, you a have a list of new modules that were introduced to Python recently. As always, I suggest you take a look at the 2.0 documentation for details about any given module.

atexit Registers functions to be called when Python exits. If you already use the function sys.exitfunc(), you should change your code to import atexit, and call the function atexit.register(), passing as an argument the function that you want to call on exit.

codecs Provides support (base classes) for Unicode encoders and decoders, and provides access to Python's codec registry. You can use the functions provided by this module to search for existing encodings, or to register new ones. Most frequently, you will adhere to the function codecs.lookup(encoding), which returns a 4-function tuple: (encoder, decoder, stream_reader, stream_writer). This module along with the unicodedata module was added as part of the new Unicode support to Python 2.0. The condec class defines the interface for stateless encoders and decoders. The following functions and classes are also available in this module.

codec.encode() Takes a Unicode string, and returns a 2-tuple (8-bit-string, length). The length part of the tuple shows how much of the Unicode string was converted.

codec.decode() Takes an 8-bit string, and returns a 2-tuple (ustring, length). The length part of the tuple shows how much of the 8-bit string was consumed.

codecs.stream_reader(file_object) This is a class that supports decoding input from a stream. Objects created with this class carry the read(), readline(), and readlines() methods, which allow you to take the given encoding of the object, and read as a Unicode string.

codecs.stream_writer(file_object) This is a class that supports encoding output to a stream. Objects created with this class carry the write() and writelines() methods, which allow you to pass Unicode string to the object, and let the object translate them to the given encoding on output.

unicodedata This module provides access to the Unicode 3.0 database of character properties. The following functions are available:

unicodedata.category(u'P') returns the 2-character string 'Lu', the 'L'denoting it's a letter, and 'u'meaning that it's uppercase.

unicodedata.bidirectional(u'\ x0660') returns 'AN', meaning that U+0660 is an Arabic number.

encodings This is a package that supplies a wide collection of standard codecs. Currently, only the new Unicode support is provided.

distutils Package of tools for distributing Python modules.

filecmp This module comes into place of both the ... Expand> <Close

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