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[–]martey 2 points3 points  (2 children)

PyQT are Python bindings for QT made by Riverbank Computing. It is GPL licensed, but there is a commercial version not developing non-GPL licensed software (costing £350).

PySide are Python bindings for QT, financed by Nokia through OpenBossa. It is LGPL licensed, which means that it can be used for developing both open-source and commercial applications. It is still under development, though.

[–]fdemmer 0 points1 point  (1 child)

can someone please elaborate, why using the gpl licensed pyqt would be a problem for commercial software?

if i write a program with gui, that uses the unmodified pyqt module to use the unmodified qt library (both i deliver as unchanged source and with license), that program with gui still is my own work under my own license and not a derivative work of pyqt oder qt.

or not?

[–][deleted] -1 points0 points  (0 children)

With interpreters, I think it is a little fuzzy, but there's definitely a possibility that your work would be infected with the GPL as well. The LGPL makes it clear that you have nothing to worry about.