python-dbg is unable to import webkit

I'm trying to debug a python application (exaile) that uses python-webkit, but can't, because python-dbg won't load the webkit extension. I'm not sure, but it looks to me like this might be due to not having a debug version of python-webkit. Sadly, the ubuntu repositories don't seem to include any such debug version.

$ python-dbg -c 'import webkit'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/webkit/__init__.py", line 21, in <module>
    import webkit
ImportError: /usr/lib/python2.7/dist-packages/webkit/webkit.so: undefined symbol: Py_InitModule4_64
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport_python_hook.py", line 64, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python2.7/dist-packages/apport/__init__.py", line 5, in <module>
    from apport.report import Report
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 30, in <module>
    import apport.fileutils
  File "/usr/lib/python2.7/dist-packages/apport/fileutils.py", line 23, in <module>
    from apport.packaging_impl import impl as packaging
  File "/usr/lib/python2.7/dist-packages/apport/packaging_impl.py", line 20, in <module>
    import apt
  File "/usr/lib/python2.7/dist-packages/apt/__init__.py", line 21, in <module>
    import apt_pkg
ImportError: /usr/lib/python2.7/dist-packages/apt_pkg.so: undefined symbol: Py_InitModule4_64

Original exception was:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/webkit/__init__.py", line 21, in <module>
    import webkit
ImportError: /usr/lib/python2.7/dist-packages/webkit/webkit.so: undefined symbol: Py_InitModule4_64
[44587 refs]

$ lsb_release -r
Release: 13.10