Unable to run cameracalibration: module cv2 not found

edit

I am trying to run the camera calibration for my videre stereo camera's.I built the camera calibration package and it did nt give any errors.But when i am trying the camera calibrator node it is givving erors like "no module cv2 found".I tried to find find cv2.so but i found only cv.so.So i commented out import cv2 and just used import cv.Also i changed everywhere in the code where there is cv2 to cv.Now when i am trying to run the node i am getting the following errors.

Exception in thread Thread-4:

Traceback (most recent call last):

File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner

self.run()

File "/home/srik/ros/image_pipeline/camera_calibration/nodes/cameracalibrator.py", line 73,

in run

self.function(m)

File "/home/srik/ros/image_pipeline/camera_calibration/nodes/cameracalibrator.py", line

146, in handle_stereo

self.redraw_stereo(drawable)

File "/home/srik/ros/image_pipeline/camera_calibration/nodes/cameracalibrator.py", line

292, in redraw_stereo

if len(drawable.params) != 0:

TypeError: object of type 'NoneType' has no len()

I am stuck at this point.I dont know how to proceed from here.Any suggestions would be greatly appreciated.Thanking you