sci-chemistry jlec@gentoo.org The PyMca Toolkit is a collection of Python tools for visualization and analysis of energy-dispersive X-ray fluorescence data. It builds its graphic interface and plotting routines on top of the C++ libraries Qt and Qwt through their respective Python bindings PyQt and PyQwt. Nevertheless, the data analysis routines can be used independently of any graphical interface. Support for plotting through matplotlib pymca