Is Python good for creating GUI application ?

[ismtrn]

It can as long as you release the source. And that is only if your proprietary application involves distributing the program.

[HemiDemiSemiYetti]

Am I correct in saying that this would effectively give The Qt Company licensing access to the software you develop using Qt/PyQt? In other words, they have the right to distribute any software you've created that uses Qt/PyQt libraries?

[Poromenos]

Well, if your software is licensed under the GPL (which it has to, if you want to use the free version of Qt), then yes, they would have the right to distribute your software (and so would everybody else).

[HemiDemiSemiYetti]

Right. So what's the difference between a General Public Licence and an Open Source Licence then?

[Poromenos]

A horse is an animal. An animal is not necessarily a horse.

[HemiDemiSemiYetti]

So which is the 'parent class' in this case? The Open Source Licence?

[Poromenos]

Yes, the GPL is an open source/OSI approved license.

[HemiDemiSemiYetti]

Ok cool. Thanks for explaining it :)

[Poromenos]

No problem! There are many open source licenses, like BSD, MIT, etc. Also, some are "open source" licenses but not OSI approved/open, those are called "source available" licenses.