You can use PySide2 instead of PyQt. And you don't need a Qt license when just using it from Python, because Qt is licensed under the LGPL and you are allowed t

You can use PySide2 instead of PyQt. And you don't need a Qt license when just using it from Python, because Qt is licensed under the LGPL and you are allowed to link to it dynamically. So, if putting your project under the GPL is not an option for you, then the only commercial license you need is fbs. (Caveat: IANAL)