[PyQt] pyqtdeploy, Ubuntu and dynamically loading modules...

Phil Thompson phil at riverbankcomputing.com
Tue Mar 8 22:57:11 GMT 2016

On 8 Mar 2016, at 6:49 pm, Robert Kent <rob at gulon.co.uk> wrote:
> Hi Phil,
> After successfully creating a build of my application with MacOSX and Windows using pyqtdeploy I am now onto the final candidate, namely Linux (Ubuntu to be precise). I have successfully got my application to build, but when I come to run it and load modules dynamically I run into the following error:
> ...
>  File ":/imp.py", line 243, in load_module
> ImportError: numpy.core.multiarray.so: undefined symbol: PyExc_SystemError
> I am using the exact same mechanism and layout that I used (sucessfully) on MacOSX, i.e. numpy.core.multiarray.so is placed alongside my exectuable, so I'm not sure where I'm going wrong. Google seems to think that it may be because numpy was built with/for the (static?) system Python and this maybe some kind of issue (I actually installed it via pip). If this is the case, how do I go about rebuilding it from source as the deployed python is a library, not an exe?
> My setup is as follows:
> Ubuntu 15.04 64bit
> pyqtdeploy 1.2
> Python 3.4.3
> PyQt 5.4.2
> Qt 5.4.2
> Any thoughts, advice or suggestions would be thoroughly appreciated!

Sorry, I've never used numpy.

I would expect the system Python to be dynamic (although there may be a static library installed as well). I'd play with LD_LIBRARY_PATH to make sure the right dynamic library is being found.


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