[PySide] Can PySide run with Qt DLLs in another location other than Lib\site-packages\PySide\

[Roman Lacko]

Hi Thomas,

2012/10/3 Thomas Berg <merlin66b at gmail.com>:
> Hi,
>
> I am working together with Ameya on this problem. To tell the whole
> story: we are developing an application that embeds Python. We also
> include the python executable in our distribution. Our file layout
> mirrors that of a python distro. On Windows it looks like this:
>
> <install_dir>/our_app.exe
> <install_dir>/python.exe
> <install_dir>/QtGui4.dll <-- must be in the same directory as
> our_app.exe, since it is a Qt4 application
> <install_dir>/Lib/site-packages/PySide
>
> We would like PySide to work both from scripts run by our_app.exe and
> from python.exe.
>
> It is acceptable for us to modify the environment before running our python.exe.
>
> We prefer not to duplicate the Qt libraries into the site-packages
> directory. From what I read here, this should be possible: PySide can
> still be loaded from our python.exe as long as our application
> directory is added to PATH?

Yes pyside will work when Qt libs are in PATH

>
> If possible we would like to avoid having a qt.conf, since that
> complicates the installation process. (it needs to work automatically
> both when developers compile it on their machines, and when our app
> gets installed to custom locations by the users).

PySide will not work without qt,conf, as you can read here
http://doc-snapshot.qt-project.org/4.8/qt-conf.html,
you need to override the hardcoded paths in Qt library.

I would generate qt.cong with build tool (cmake or whatever) when
compiling on dev machine.
When instaling on users machie, the qt.conf can (and should) be
generated by app installer.

>
> Similarly, shouldn't it be sufficient that the location of the Qt
> libraries are added to LD_LIBRARY_PATH on Linux?

Yes adding Qt libs to LD_LIBRARY_PATH shoud work + you need change
paths in qt.conf

Regards
Roman

>
> Thanks for any input,
> - Thomas
>
>
> On Wed, Oct 3, 2012 at 11:18 AM, ameya dambir <ameyadambir at gmail.com> wrote:
>> Hi,
>> I am trying to do same thing on linux but it didn't work.
>>
>> There is one thing which bothering me. Inside my qt/lib there I have made
>> two folders debug and release as per the version requirement and place
>> respective file versions in it. Should I mention that in this conf file? If
>> yes then where?
>>
>> Thanks in advance.
>>
>> Ameya
>>
>>
>>
>> On Fri, Sep 28, 2012 at 2:40 PM, Roman Lacko <backup.rlacko at gmail.com>
>> wrote:
>>>
>>> Hi,
>>>
>>> just one note on sharing Qt DLLs, I don't recommend to share Qt DLLs
>>> in one directory because you need to add that dir to PATH environment
>>> variable so PySide can find the DLLs.
>>>
>>> If Qt DLLs are in PySide dir you can install more PySide versions
>>> built against different Qt versions. And You can install PySide in
>>> virtualenv.
>>>
>>> Regards
>>> R.
>>>
>>> 2012/9/28 Tejashri Kandolkar <tejashri.kandolkar at gmail.com>:
>>> > Hi,
>>> >
>>> > After installing PySide1.1.2, I see that all the qt DLL's are getting
>>> > copied
>>> > in the ...\python_3_2\release\Lib\site-packages\PySide\  directory
>>> > Can I have PySide run without the Qt DLL's in the
>>> > ...\Lib\site-packages\PySide\ directory, but some\other\directory\...
>>> >
>>> > If yes, then whats the change that needs to be taken care of while
>>> > building
>>> > PySide? (There should be some change in cmake scripts I suppose but not
>>> > sure
>>> > where.)
>>> >
>>> > I am interested in this because I already have the Qt DLLs present in a
>>> > top
>>> > level directory, and copying the same DLLs again in the PySide dir is a
>>> > duplication.
>>> >
>>> > Regards,
>>> > Tej
>>> >
>>> >
>>> > _______________________________________________
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>>> > PySide at qt-project.org
>>> > http://lists.qt-project.org/mailman/listinfo/pyside
>>> >
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>>
>>
>>
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