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On behalf of the Python development team, I'm quite happy to announce the Python 3.3.3 release candidate 1.
Python 3.3.3 includes several security fixes and over 150 bug fixes compared to the Python 3.3.2 release.
This release fully supports OS X 10.9 Mavericks. In particular, this release fixes an issue that could cause previous versions of Python to crash when typing in interactive mode on OS X 10.9.
Python 3.3.3 also contains a new batteries-included feature for OS X users of IDLE and other Tkinter-based programs. The python.org Mac OS X 64-bit/32-bit x86-64/i386 Installer for OS X 10.6+ now includes its own builtin version of Tcl/Tk 8.5. It is no longer necessary to install a third-party version of Tcl/Tk 8.5 to workaround the problematic system versions. See http://www.python.org/download/mac/tcltk/ for more information.
Python 3.3 includes a range of improvements of the 3.x series, as well as easier porting between 2.x and 3.x. In total, almost 500 API items are new or improved in Python 3.3. For a more extensive list of changes in the 3.3 series, see
and for the detailed changelog of 3.3.3, see
To download Python 3.3.3 rc1 visit:
This is a preview release, please report any bugs to
The final version is scheduled to be released in two weeks' time, on or about the 10th of November.
- -- Georg Brandl, Release Manager georg at python.org (on behalf of the entire python-dev team and 3.3's contributors)