| This is Python version 3.0.1 |
| ============================ |
| |
| For notes specific to this release, see RELNOTES in this directory. |
| Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
| Python Software Foundation. |
| All rights reserved. |
| |
| Python 3 (a.k.a. "Python 3000" or "Py3k", and released as Python 3.0) is a new |
| version of the language, which is incompatible with the 2.x line of releases. |
| The language is mostly the same, but many details, especially how built-in |
| objects like dictionaries and strings work, have changed considerably, and a |
| lot of deprecated features have finally been removed. |
| |
| |
| Documentation |
| ------------- |
| |
| Documentation for Python 3.0 is online, updated twice a day: |
| |
| http://docs.python.org/dev/3.0/ |
| |
| All documentation is also available online at the Python web site |
| (http://docs.python.org/, see below). It is available online for occasional |
| reference, and it can be downloaded in many formats for faster local access. |
| The documentation is downloadable in HTML, PostScript, PDF, LaTeX (through |
| 2.5), and reStructuredText (2.6, 3.0, and going forward) formats; the LaTeX |
| and reStructuredText versions are primarily for documentation authors, |
| translators, and people with special formatting requirements. |
| |
| This is a work in progress; please help improve it! |
| |
| The design documents for Python 3 are also online. While the reference |
| documentation is being updated, the PEPs are often the best source of |
| information about new features. Start by reading PEP 3000: |
| |
| http://python.org/dev/peps/pep-3000/ |
| |
| |
| What's New |
| ---------- |
| |
| For an overview of what's new in Python 3.0, see Guido van Rossum's blog at |
| artima.com: |
| |
| http://www.artima.com/weblogs/index.jsp?blogger=guido |
| |
| We try to eventually have a comprehensive overview of the changes in the |
| "What's New in Python 3.0" document, found at |
| |
| http://docs.python.org/dev/3.0/whatsnew/3.0 |
| |
| Please help improve it! |
| |
| For a more detailed change log, read Misc/NEWS, though this file, too, is |
| incomplete, and also doesn't list anything merged in from the 2.6 release. |
| |
| If you want to install multiple versions of Python see the section below |
| entitled "Installing multiple versions". |
| |
| |
| Proposals for enhancement |
| ------------------------- |
| |
| If you have a proposal to change Python, you may want to send an email to the |
| comp.lang.python or python-ideas mailing lists for initial feedback. A Python |
| Enhancement Proposal (PEP) may be submitted if your idea gains ground. All |
| current PEPs, as well as guidelines for submitting a new PEP, are listed at |
| http://www.python.org/dev/peps/. |
| |
| |
| Converting From Python 2.x to 3.0 |
| --------------------------------- |
| |
| Python 2.6 contains features to help locating and updating code that needs to |
| be changed when migrating to Python 3. |
| |
| A source-to-source translation tool, "2to3", can take care of the |
| mundane task of converting large amounts of source code. It is not a |
| complete solution but is complemented by the deprecation warnings in |
| 2.6. This tool is currently available via the Subversion sandbox: |
| |
| http://svn.python.org/view/sandbox/trunk/2to3/ |
| |
| |
| Installing multiple versions |
| ---------------------------- |
| |
| On Unix and Mac systems if you intend to install multiple versions of Python |
| using the same installation prefix (--prefix argument to the configure script) |
| you must take care that your primary python executable is not overwritten by |
| the installation of a different version. All files and directories installed |
| using "make altinstall" contain the major and minor version and can thus live |
| side-by-side. "make install" also creates ${prefix}/bin/python which refers |
| to ${prefix}/bin/pythonX.Y. If you intend to install multiple versions using |
| the same prefix you must decide which version (if any) is your "primary" |
| version. Install that version using "make install". Install all other |
| versions using "make altinstall". |
| |
| For example, if you want to install Python 2.5, 2.6 and 3.0 with 2.6 being the |
| primary version, you would execute "make install" in your 2.6 build directory |
| and "make altinstall" in the others. |
| |
| |
| Issue Tracker and Mailing List |
| ------------------------------ |
| |
| We're soliciting bug reports about all aspects of the language. Fixes are |
| also welcome, preferable in unified diff format. Please use the issue |
| tracker: |
| |
| http://bugs.python.org/ |
| |
| If you're not sure whether you're dealing with a bug or a feature, use the |
| mailing list: |
| |
| [email protected] |
| |
| To subscribe to the list, use the Mailman form: |
| |
| http://mail.python.org/mailman/listinfo/python-dev/ |
| |
| |
| Build Instructions |
| ------------------ |
| |
| On Unix, Linux, BSD, OSX, and Cygwin: |
| |
| ./configure |
| make |
| make test |
| sudo make install # or "make altinstall" |
| |
| You can pass many options to the configure script; run "./configure |
| --help" to find out more. On OSX and Cygwin, the executable is called |
| python.exe; elsewhere it's just python. |
| |
| On Mac OS X, if you have configured Python with --enable-framework, |
| you should use "make frameworkinstall" to do the installation. Note |
| that this installs the Python executable in a place that is not |
| normally on your PATH, you may want to set up a symlink in |
| /usr/local/bin. |
| |
| On Windows, see PCbuild/readme.txt. |
| |
| If you wish, you can create a subdirectory and invoke configure from |
| there. For example: |
| |
| mkdir debug |
| cd debug |
| ../configure --with-pydebug |
| make |
| make test |
| |
| (This will fail if you *also* built at the top-level directory. You |
| should do a "make clean" at the toplevel first.) |
| |
| |
| Copyright and License Information |
| --------------------------------- |
| |
| Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
| Python Software Foundation. |
| All rights reserved. |
| |
| Copyright (c) 2000 BeOpen.com. |
| All rights reserved. |
| |
| Copyright (c) 1995-2001 Corporation for National Research Initiatives. |
| All rights reserved. |
| |
| Copyright (c) 1991-1995 Stichting Mathematisch Centrum. |
| All rights reserved. |
| |
| See the file "LICENSE" for information on the history of this |
| software, terms & conditions for usage, and a DISCLAIMER OF ALL |
| WARRANTIES. |
| |
| This Python distribution contains *no* GNU General Public License |
| (GPL) code, so it may be used in proprietary projects. There are |
| interfaces to some GNU code but these are entirely optional. |
| |
| All trademarks referenced herein are property of their respective |
| holders. |
