pyqt4 & qt license
cmpython at gmail.com
Sun Mar 10 04:31:21 CET 2013
On Mar 9, 9:08 pm, pitsa... at gmail.com wrote:
> 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."
"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.
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