I tried to follow this page

http://wiki.ros.org/cv_bridge/Tutorials/ConvertingBetweenROSImagesAndOpenCVImagesPython

after using catkin_make I tried to run the code following is the error:

admin-pc@admin-pc:~/mywork$ rosrun mycv mycv.py
Traceback (most recent call last):
  File "/home/admin-pc/mywork/src/mycv/scripts/mycv.py", line 12, in <module>
    class image_converter:
  File "/home/admin-pc/mywork/src/mycv/scripts/mycv.py", line 48, in image_converter
    main(sys.argv)
  File "/home/admin-pc/mywork/src/mycv/scripts/mycv.py", line 39, in main
    ic = image_converter()
NameError: global name 'image_converter' is not defined

Please tell how to fix this problem