gistfile1.txt

======================== summary ==========================
i've made many attempts of getting pyqwt to work and here is my newest fail:
SystemError: dynamic module not initialized properly

what i did was:
- now using qwt-5.2 bundled with pyqwt-5.2.0 implementation (for qwt)
- BUT i'm actually not using qw5 from the ${pkgs.qwt} directory but also the bundled one (don't ask, didn't get it working)

so this incarnation of Qwt.so seems to be working in regards to:
- readelf -s Qwt.so
- ldd -r Qwt.so

(which were failing most of the time with the attempt of using qwt-5.x other than the bundled one)

also note that i've added: -lpython2.7 which protects me from these errors using:

ldd -r Qwt.so:
undefined symbol: PyList_Type   (/nix/store/vhkam9jkpn0i34r33qgkfkb2wgbk07sc-python2.7-pyqwt-5.2.0/lib/python2.7/site-packages/Qwt5/Qwt.so)
    undefined symbol: PyCapsule_Type        (/nix/store/vhkam9jkpn0i34r33qgkfkb2wgbk07sc-python2.7-pyqwt-5.2.0/lib/python2.7/site-packages/Qwt5/Qwt.so)
    undefined symbol: PyCObject_Type        (/nix/store/vhkam9jkpn0i34r33qgkfkb2wgbk07sc-python2.7-pyqwt-5.2.0/lib/python2.7/site-packages/Qwt5/Qwt.so)

which was still an issue in the ce73b8a39a2726947b83ef46dfc8af075af57acf commit of https://github.com/qknight/nixpkgs/commits/brickv-2.1.1

========================================unit test ==================================================
joachim@lenovo-t530 ...a5v2lw-python2.7-pyqwt-5.2.0/examples % ./CPUplot.py
Traceback (most recent call last):
  File "/nix/store/pixq2iwdj56fk8x78r3gmnzzzqa5v2lw-python2.7-pyqwt-5.2.0/examples/.CPUplot.py-wrapped", line 11, in <module>
    import Qwt5 as Qwt
  File "/nix/store/pixq2iwdj56fk8x78r3gmnzzzqa5v2lw-python2.7-pyqwt-5.2.0/lib/python2.7/site-packages/Qwt5/__init__.py", line 32, in <module>
    from Qwt import *
SystemError: dynamic module not initialized properly
1 joachim@lenovo-t530 ...a5v2lw-python2.7-pyqwt-5.2.0/examples % http://stackoverflow.com/questions/2435125/trying-to-get-django-app-to-work-with-mod-wsgi-on-centos-5

========================================ldd to the Qwt.so ==================================================
joachim@lenovo-t530 ...a5v2lw-python2.7-pyqwt-5.2.0/examples % ldd ../lib/python2.7/site-packages/Qwt5/Qwt.so
        linux-vdso.so.1 (0x00007fff551fe000)
        libpython2.7.so.1.0 => /nix/store/6l1bvljpy8gazlsw2aw9skwwp4pmvyxw-python-2.7.8/lib/libpython2.7.so.1.0 (0x00007fe6eac99000)
        libQtCore.so.4 => /nix/store/7c85qvshhiwz23s1mmifv8hxlh6g2i5s-qt-4.8.6/lib/libQtCore.so.4 (0x00007fe6ea7a1000)
        libpthread.so.0 => /nix/store/i11d0d4015p0vbdnjq7lb509v9pwp049-glibc-2.19/lib/libpthread.so.0 (0x00007fe6ea583000)

points to /nix/store/6l1bvljpy8gazlsw2aw9skwwp4pmvyxw-python-2.7.8/lib/libpython2.7.so.1.0 

and
========================================the CPUplot.py-wrapped interpreter ==================================================
cat /nix/store/pixq2iwdj56fk8x78r3gmnzzzqa5v2lw-python2.7-pyqwt-5.2.0/examples/.CPUplot.py-wrapped
#!/nix/store/6l1bvljpy8gazlsw2aw9skwwp4pmvyxw-python-2.7.8/bin/python 

# The Python version of qwt-*/examples/cpuplot


import sys; sys.argv[0] = 'CPUplot.py'
import os
import sys

from PyQt4 import Qt
import Qwt5 as Qwt
from Qwt5.anynumpy import *

probably same cause as in this report:
http://lists.cairographics.org/archives/cairo/2013-May/024334.html