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List:       pykde
Subject:    Re: [PyQt] Has the GPL_EXCEPTION.TXT been revoked?
From:       Pepijn Kenter <titusjan () gmail ! com>
Date:       2016-09-26 8:33:07
Message-ID: 7D6D278F-8B2A-416E-8508-F134AA144C05 () gmail ! com
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> On 24 Sep 2016, at 19:24, Phil Thompson <phil@riverbankcomputing.com> wrote:
> 
> On 24 Sep 2016, at 4:24 pm, Pepijn Kenter <titusjan@gmail.com> wrote:
> > 
> > 
> > > On 24 Sep 2016, at 11:38, Phil Thompson <phil@riverbankcomputing.com> wrote:
> > > 
> > > On 24 Sep 2016, at 10:03 am, Pepijn Kenter <titusjan@gmail.com> wrote:
> > > > 
> > > > Dear all.
> > > > 
> > > > I'd like to release my software, which uses PyQt, under the MIT license. \
> > > > There used to be an exception that, if I understand correctly, allowed this. \
> > > > This was is the file called GPL_EXCEPTION.TXT that comes with the source \
> > > > distribution of PyQt 4.11.3 and earlier. However, from version 4.11.4 onwards \
> > > > and in PyQt5 this file is no longer present. Can you tell me if the exception \
> > > > has been revoked? 
> > > > I know that this has been asked before in this mailing list here: \
> > > > https://riverbankcomputing.com/pipermail/pyqt/2014-February/033848.html. \
> > > > However, that answer mentions that the MIT is compatible with the GPL-3, \
> > > > which I believe is true as long as you release your software under the GPL \
> > > > (see https://www.gnu.org/licenses/gpl-faq.en.html#WhatDoesCompatMean). The \
> > > > exception would allow me to release my SW under the MIT license. 
> > > 
> > > There is no problem using the MIT license for the code you write. If you \
> > > *distribute* your code *with* the GPL version of PyQt then you must do so under \
> > > the terms of the GPL. 
> > > Phil
> > 
> > Thank you Phil, for your quick reply. 
> > 
> > Sorry if I'm dense but your emphasis on the words *distribute* and *with* make it \
> > look to me that you discern three situations: 
> > 1) Write code that uses PyQt but don't distribute it. I think there is no license \
> > needed at all (so I can use the MIT of course). Anyway, this situation is not \
> > relevant to me. 2) Distribute my code *with* PyQT included in one package or \
> > executable. It's clear from your answer that I would then need to distribute \
> > under the GPL. 3) Distribute my code *without* PyQt but let my users download and \
> > install PyQt separately.  
> > The third situation is actually what I want. My SW works with both PySide and \
> > PyQt and it's up to the user to decide which of them to use. 
> > So my follow up questions is: can I release my SW under the MIT license in \
> > situation 3?
> 
> Yes.
> 
> Phil

That's clear then. Thank you.



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