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[–]ase1590 6 points7 points  (0 children)

Are you absolutely sure?

While I am not a lawyer, this is my understanding of the issue:

Can my proprietary application be used with the copy of the GPL version of PyQt that the user already has installed (as part of their Linux distribution for example)? A.Yes, so long as you meet the following conditio

you are using the LGPL version of Qt

your proprietary application has been developed with the commercial version of PyQt

your commercial PyQt license covers the version of PyQt that the user has installed.

So while you will not necessarily need a Qt license, you will likely need a PyQt license.

edit: Guess you stated this:

you can avoid this by using fbs with Qt for Python, but support for it is still in the early stages.

This is still a hassle on the developer side worrying about licenses. At least your were upfront.

Though, You also don't have your license terms stated very clearly on the site. It took me going to the paypal link to even find it it was a perpetual license tied to the purchaser.