[PyKDE] Qt+PyQt 4 commercial license cost?

[Glen W. Mabey]

On Sat, Mar 25, 2006 at 11:15:48PM +0000, Phil Thompson wrote:
> On Saturday 25 March 2006 9:03 pm, John J. Lee wrote:
> > Up to now, using PyQt in a commercial environment has been cheap
> > compared to Qt/C++, because the combined license costs of PyQt and Qt
> > were low when buying them as part of Blackadder.  Phil has indicated
> > that there will not be a Blackadder for PyQt4.  Does that mean that
> > people using PyQt4 commercially will have to pay the standard
> > Trolltech prices for Qt, plus the PyQt4 commercial license cost?

After reading

    http://www.riverbankcomputing.co.uk/pyqt/buy.php

I understand that a PyQt license must be purchased from Riverband Computing 
in order to develop closed-source PyQt applications, but I'm not clear on 
something:

Is it also necessary to purchase a Qt developer license from Trolltech when
developing closed-source PyQt3 applications?

Thank you,
Glen Mabey