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 2-dimensional plotting widget 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: fairly good hardware allows a rate of 100,000 points/second. (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-5.1.0 are: - support for Qwt-5.1.0. - support for PyQt-4.4.2 and SIP-4.7.6. - support for Qt-4.4. - the CartesianDemo.py, MaskedDataDemo.py, PickerDemo.py examples. The most important bug fixes in PyQwt-5.1.0 are: - fixed QwtPicker::stateMachine() to allow for subclassing of QwtPicker in Python. PyQwt-5.1.0 supports: 1. Python-2.5, or -2.4. 2. PyQt-3.17. 3. PyQt-4.4, 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-4.4, Qt-4.3, or Qt-4.2. 6. Qwt-5.1, or Qwt-5.0. 7. Recent versions of NumPy, numarray, and/or Numeric. Enjoy -- Gerard Vermeulen