What is PyQwt ( http://pyqwt.sourceforge.net ) ? - it is a set of Python bindings for the Qwt C++ class library which extends the Qt framework with widgets for scientific and engineering applications. It provides a widget to plot 2-dimensional data and various widgets to display and control bounded or unbounded floating point values. - it requires and extends PyQt, a set of Python bindings for Qt. - it supports the use of PyQt-3, Qt-3, Qwt-4.2, the Numerical Python extensions (any combination of NumPy, numarray, and Numeric) and optionally SciPy in a GUI Python application or in an interactive Python session. - it runs on POSIX, Mac OS X and Windows platforms (practically any platform supported by Qt and Python). - PyQwt-4.2.3 can coexist with PyQwt-5.0.x (for Qt-3 and Qt-4) This is a maintenance release with backports of the newest features in PyQwt-5.0.1 to PyQwt-4.2.3. PyQwt-4.2.3 should not be used for new code. New features and bug fixes in PyQwt-4.2.3 are: - support for SIP-4.7, and PyQt-3.17.3. - support for the N-D array interface specification ( http://numpy.scipy.org/array_interface.shtml ) allows to copy data out of NumPy arrays without enabling support for NumPy during the compilation of PyQwt. - the iqt module also supports an interactive Python session without the help of the GNU readline module. - removal of a huge memory leak in the conversion from an array to a QImage. PyQwt-4.2.3 supports: 1. Python-2.5.x, or -2.4.x. 2. PyQt-3.17.x. 3 SIP-4.7.x, or -4.6.x. 4. Qt-3.3.x, or -3.2.x. Enjoy -- Gerard Vermeulen