Error related to -ImportError: and swig_import_helper()

GNU Radio
1

hi all ,
i have write comedi block while running program i am getting error
Traceback (most recent call last):
File “/home/jagdish/top_block.py”, line 13, in
import comedi
File “/usr/local/lib/python2.6/dist-packages/comedi/init.py”, line
40, in
from comedi_swig import *
File “/usr/local/lib/python2.6/dist-packages/comedi/comedi_swig.py”,
line 24, in
_comedi_swig = swig_import_helper()
File “/usr/local/lib/python2.6/dist-packages/comedi/comedi_swig.py”,
line 20, in swig_import_helper
_mod = imp.load_module(’_comedi_swig’, fp, pathname, description)
ImportError: /usr/local/lib/libgnuradio-comedi-3.3.0.so.0: undefined
symbol: comedi_open

thanks