> update-apt-xapian-index
Traceback (most recent call last):
  File "/usr/sbin/update-apt-xapian-index", line 66, in <module>
    import axi.indexer
  File "/usr/lib/python3/dist-packages/axi/indexer.py", line 31, in <module>
    import xapian
  File "/usr/lib/python2.7/dist-packages/xapian/__init__.py", line 43, in <module>
    _xapian = swig_import_helper()
  File "/usr/lib/python2.7/dist-packages/xapian/__init__.py", line 39, in swig_import_helper
    _mod = imp.load_module('_xapian', fp, pathname, description)
  File "/usr/lib/python3.5/imp.py", line 242, in load_module
    return load_dynamic(name, filename, file)
  File "/usr/lib/python3.5/imp.py", line 342, in load_dynamic
    return _load(spec)
ImportError: /usr/lib/python2.7/dist-packages/xapian/_xapian.so: undefined symbol: PyInstance_Type