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167 lines
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167 lines
5.0 KiB
Plaintext
This is Python version 3.0 alpha 2
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==================================
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For notes specific to this release, see RELNOTES in this directory.
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Python 3000 (a.k.a. "Py3k", and released as Python 3.0) is a new
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version of the language, which is incompatible with the 2.x line of
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releases. The language is mostly the same, but many details,
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especially how built-in objects like dictionaries and strings work,
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have changed considerably, and a lot of deprecated features have
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finally been removed.
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This is an ongoing project; the cleanup isn't expected to be complete
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until some time in 2008. In particular there are plans to reorganize
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the standard library namespace.
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Release Schedule
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----------------
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The release plan is to have a series of alpha releases in 2007, beta
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releases in 2008, and a final release in August 2008. The alpha
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releases are primarily aimed at developers who want a sneak peek at
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the new langauge, especially those folks who plan to port their code
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to Python 3000. The hope is that by the time of the final release,
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many 3rd party packages will already be available in a 3.0-compatible
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form.
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Documentation
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-------------
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Documentation for Python 3000 is online, updated twice a day:
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http://docs.python.org/dev/3.0/
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This is a work in progress; please help improve it!
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The design documents for Python 3000 are also online. While the
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reference documentation is being updated, the PEPs are often the best
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source of information about new features. Start by reading PEP 3000:
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http://python.org/dev/peps/pep-3000/
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What's New
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----------
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For an overview of what's new in Python 3000, see Guido van Rossum's
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blog at artima.com:
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http://www.artima.com/weblogs/index.jsp?blogger=guido
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We'll eventually have a comprehensive overview of the changes in a
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"What's New in Python 3.0" document. Please help write it!
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What's New Since 3.0a1
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----------------------
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Undoubtedly the biggest change is in the bytes type: 'bytes' is now
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immutable, and there is a new mutable bytes type 'bytearray'. These
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two types are interoperable in every way. For more info on this
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issue, read PEP 3137.
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For a more detailed change log, read Misc/NEWS (though this file, too,
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is incomplete, and also doesn't list anything merged in from the 2.6
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release under development).
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Converting From Python 2.x to 3.0
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---------------------------------
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Python 2.6 (not yet released) will contain features to help locating
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code that needs to be changed, such as optional warnings when
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deprecated features are used, and backported versions of certain key
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Python 3000 features.
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A source-to-source translation tool, "2to3", can take care of the
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mundane task of converting large amounts of source code. It is not a
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complete solution but is complemented by the deprecation warnings in
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2.6. This tool is currently available via the Subversion sandbox:
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http://svn.python.org/view/sandbox/trunk/2to3/
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Issue Tracker and Mailing List
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------------------------------
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We're soliciting bug reports about all aspects of the language. Fixes
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are also welcome, preferable in unified diff format. Please use the
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issue tracker:
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http://bugs.python.org/
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If you're not sure whether you're dealing with a bug or a feature, use
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the mailing list:
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python-3000@python.org
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To subscribe to the list, use the mailman form:
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http://mail.python.org/mailman/listinfo/python-3000/
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Build Instructions
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------------------
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On Unix, Linux, BSD, OSX, and Cygwin:
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./configure
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make
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make test
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sudo make install # or "make altinstall"
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You can pass many options to the configure script; run "./configure
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--help" to find out more. On OSX and Cygwin, the executable is called
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python.exe; elsewhere it's just python.
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On Mac OS X, if you have configured Python with --enable-framework,
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you should use "make frameworkinstall" to do the installation. Note
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that this installs the Python executable in a place that is not
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normally on your PATH, you may want to set up a symlink in
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/usr/local/bin.
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On Windows, see PCbuild/readme.txt.
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If you wish, you can create a subdirectory and invoke configure from
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there. For example:
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mkdir debug
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cd debug
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../configure --with-pydebug
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make
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make test
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(This will fail if you *also* built at the top-level directory. You
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should do a "make clean" at the toplevel first.)
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Copyright and License Information
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---------------------------------
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Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007
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Python Software Foundation.
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All rights reserved.
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Copyright (c) 2000 BeOpen.com.
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All rights reserved.
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Copyright (c) 1995-2001 Corporation for National Research Initiatives.
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All rights reserved.
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Copyright (c) 1991-1995 Stichting Mathematisch Centrum.
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All rights reserved.
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See the file "LICENSE" for information on the history of this
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software, terms & conditions for usage, and a DISCLAIMER OF ALL
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WARRANTIES.
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This Python distribution contains *no* GNU General Public License
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(GPL) code, so it may be used in proprietary projects. There are
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interfaces to some GNU code but these are entirely optional.
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All trademarks referenced herein are property of their respective
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holders.
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