Python 3.3.3 was released on November 17th, 2013. This release fixes several security and a lot of overall bug fixes found in Python 3.3.2. 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.
More detailed changelog is available here: http://www.python.org/download/releases/3.3.3/
Download Python 3.3.3: http://www.python.org/ftp/python/