Error while using kitti2bag

edit

I am trying to convert the kitti dataset to a rosbag file using https://github.com/tomas789/kitti2bag... . However, when I use the command kitti2bag , the following error is displayed :

Traceback (most recent call last):
File "/usr/local/bin/kitti2bag", line 12, in <module>
import tf
File "/opt/ros/kinetic/lib/python2.7/dist-packages/tf/__init__.py", line 28, in <module>
from _tf import *
ImportError: No module named '_tf'

I tried changing _tf to tf in the _init_.py file, but then it displays

File "/usr/local/bin/kitti2bag", line 12, in <module>
import tf
File "/opt/ros/kinetic/lib/python2.7/dist-packages/tf/__init__.py", line 28, in <module>
from listener import *
ImportError: No module named 'listener'

I can't figure out how to go about this. Any and all help will be appreciated