On Mar 9, 9:08 pm, pitsa...@gmail.com wrote: > hello, > > i want to develop a GUI application that will be sold. > i want to use pyqt4. > can i download and use the GPL version during the development and then buy > the commercial verion beofore i distribute the application ?
Arguably, yes. From pyqt4's website: "Yes, you can re-license your application under a commercial license so long as you have purchased appropriate commercial PyQt licenses before you start to sell it." and also: "The availability of the LGPL version of Qt means that it is possible to evaluate using that and the GPL version of PyQt while still being able to re-license any code written during an evaluation in a future closed source application." > commercial version means LGPL? i think i am comfused so please someone > clarify on versions and licences. There is currently no version of PyQT licensed with LGPL. They refer to their commercial license as their "commercial license". > somewhere i also noticed that there is a qt license ? will i need this also ? Yes. PyQT is a wrapper for Python around QT, so you would need both. QT has, according to the site, both a GPL and LGPL version of their license. You can read up on GPL and LGPL by Googling about it, but in a nutshell, for commercial applications, of the two, LGPL is what you want. Do you know about PySide? It's another wrapper for QT that is licensed as LGPL and is free software. I don't know it's current state of development, though. Last Twitter update was about a year ago. -- http://mail.python.org/mailman/listinfo/python-list
