[Eric] Recipe for parallel installation of PyQt5 and PyQt4 on Windows

[Phil Thompson]

On 18-01-2014 2:54 pm, Detlev Offenbach wrote:
> Hello,
>
> here is a short info about how I got a parallel installation of
> PyQt4/Qt4 and PyQt5/Qt5 for Python3 on Windows using the installers
> provided via the PyQt site.
>
> 1) Download both installers.
>
> 2) Install PyQt4
>
> 3) recommended: Install eric5 and verify, that eric5/PyQt4/Qt4 work
> ok.
>
> 4) Open an explorer window, move to the site-packages directory (e.g.
> C:Python33Libsite-packages)
>
> 5) Make a copy of the PyQt4 directory
>
> 6) Uninstall PyQt4 so the PyQt5 installer doesn't complain later on.
>
> 7) Install PyQt5
>
> 8) Rename the copy of the PyQt4 directory to 'PyQt4'
>
> 9) Voila.
>
> My preliminary tests using the eric5 QRegularExpression wizard, which
> invokes a background process using PyQt5, worked fine.
>
> If further tests of the community don't show severe issues, I would
> like to ask Phil to generate an installer including both PyQt4/Qt4 
> and
> PyQt5/Qt5 to make it easier for the community. It seems that most
> people on Windows don't like to compile something.

I don't see how that can work. There can only be one qt.conf file and 
it can refer to either the Qt4 libs or the Qt5 libs, but not both.

Phil