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, Qt, Qwt, and optionally NumPy or 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). - it plots fast: displaying data with 100,000 points takes about 0.1 s (PyQwt with Qt-3 is faster than with Qt-4). - it is licensed under the GPL with an exception to allow dynamic linking with non-free releases of Qt and PyQt. The most important new features of PyQwt-5.0.1 are: - support for Qt-4.3, SIP-4.7, and PyQt-4.3 - support for the N-D array interface specification ( http://numpy.scipy.org/array_interface.shtml ). - the iqt module also supports an interactive Python session without the help of the GNU readline module. - PyQwt is now part of the PyQt-Py2.5-gpl-4.3 binary installer for Windows ( http://www.riverbankcomputing.com/Downloads/PyQt4/GPL/ ) The most important bug fix in PyQwt-5.0.1 is: - removal of a huge memory leak in the conversion from an array to a QImage. PyQwt-5.0.1 supports: 1. Python-2.5, or -2.4. 2. PyQt-3.17. 3. PyQt-4.3, or PyQt-4.2. 3 SIP-4.7, or SIP-4.6. 4. Qt-3.3, or Qt-3.2. 5. Qt-4.3, or Qt-4.2. 6. Recent versions of NumPy, numarray, and/or Numeric. Enjoy -- Gerard Vermeulen