[PyQt] ANN: PyQt v5.8 and SIP v4.19.1 Released
belepoub at gmail.com
Wed Feb 22 11:40:59 GMT 2017
Sibylle wrote :
>> Thanks Sibylle. I already had the PATH pointing to the bin directory,
but didn't work.>>
>> I finally found the solution : I had to install vcredist_2013
(Microsoft Visual C++ 2013 Redistributable)
>> It's really strange, because python 3.5.2 and PyQt5.7.1 are both using
vc2015, so I assumed they would refuse to work with a vc2013 library.
>> Life is strange ;-)
>It seems that PostgreSQL wants that library. At least the update to 9.6.2
started with "Setup Visual C++ 2013 Redistributable".
>But does that mean this must be installed on every machine accessing a
PostgreSQL database with a PyQt5 client application?
I think so.
If you want an all-in-one package, you can still use PyQt5.6, it contains
absolutely everything needed to work with PyQt/Qt.
When the wheels replaced the exe (when moving from 5.6 to 5.7), a lot of
stuff was removed from the package.
It's sometimes difficult to know what's missing, until you hit a problem.
I have seen threads on a few forums, that try to list what you need to
install to get the same stuff as before wheels, but most of them are
So far I have found these steps :
-Install Qt to get designer.exe and Qt5DesignerComponents.dll
-Install pyqt5-tools to get pyqt5.dll if you want to use custom widgets in
Designer. But pyqt5-tools is not maintained for all PyQt versions, so I
-Install MySQL to get libmysql.dll
-Install PostgreSQL to get libpq.dll
-Install vcredist_2013, or PostgreSQL will not work.
2017-02-21 18:34 GMT+01:00 Pou Belle <belepoub at gmail.com>:
> Thanks Sibylle. I already had the PATH pointing to the bin directory, but
> didn't work
> I finally found the solution : I had to install vcredist_2013 (Microsoft
> Visual C++ 2013 Redistributable)
> It's really strange, because python 3.5.2 and PyQt5.7.1 are both using
> vc2015, so I assumed they would refuse to work with a vc2013 library.
> Life is strange ;-)
> 2017-02-21 16:28 GMT+01:00 Sibylle Koczian <nulla.epistola at web.de>:
>> Am 20.02.2017 um 16:00 schrieb Pou Belle:
>>> />>> But that can't be right: it would mean repeating this with every
>>> update of either PyQt or PostgreSQL??? />>//>>/...or Qt. This is a Qt
>>> issue, nothing to do with PyQt. I assume you just
>>> need to make sure the directory containing the PostgreSQL DLL is on
>>> PATH. />>//
>>>> Done, and now it works. Thank you!
>>> Where did you find the missing dll for PostgreSQL ?
>>> DependencyWalker indicates qsqlpsql.dll needs libpq.dll in order to work.
>>> So I downloaded PostgreSQL binaries from the official site, and got
>>> But it doesn't work with PyQt5.7.1/Python3.5.2/Windows7-64bit, because
>>> libpq.dll was compiled against Visual Studio 2013, and Python3.5.2 needs
>>> Visual Studio 2015.
>> It was exactly as Phil wrote: I put the ...\bin directory of my
>> PostgreSQL installation (which contains libpq.dll) into my PATH and that
>> helped: connecting to a PostgreSQL database now works. I didn't compile
>> anything, not PyQt, not Python, not PostgreSQL. Possibly it would suffice
>> to copy libpq.dll into a subdirectory of C:\Windows which is in the PATH
>> anyway, but I don't know if that's a good idea. I know that early Firebird
>> versions did copy a client dll into C:\Windows or C:\WINNT\system32.
>> PyQt mailing list PyQt at riverbankcomputing.com
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