Riverbank Computing is pleased to announce the release of SIP v4.3 available from http://www.riverbankcomputing.co.uk/sip/. SIP is a tool for generating Python modules that wrap C or C++ libraries. It is similar to SWIG. It is used to generate PyQt and PyKDE. Full documentation is available at http://www.river-bank.demon.co.uk/docs/sip/sipref.html. SIP is licensed under the Python License and runs on Windows, UNIX, Linux and MacOS/X. SIP requires Python v2.3 or later (SIP v3.x is available to support earlier versions of Python). This release includes the following changes: - Python's cyclic garbage collector is fully supported - support for mapping between Python and C++ exceptions - support for __pos__ and __abs__ - the support for accessing C structure members has been greatly improved - C structures can have constructors and destructors defined so that they can be made to behave more Pythonically. Other features of SIP include: - support for Python new-style classes - generated modules are quick to import, even for large libraries - support for Qt's signal/slot mechanism - thread support - the ability to re-implement C++ abstract and virtual methods in Python - the ability to define Python classes that derive from abstract C++ classes - the ability to spread a class hierarchy across multiple Python modules - support for C++ namespaces - support for C++ exceptions - support for C++ operators - an extensible build system written in Python that supports over 50 platform/compiler combinations.