missing module name in smach_ros/__init__.py import statements

[marsmee]

Caused errors with Python3 on ArchLinux

Traceback (most recent call last):
  ...
    from smach_ros import MonitorState, IntrospectionServer
  File "/opt/ros/melodic/lib/python3.7/site-packages/smach_ros/__init__.py", line 52, in <module>
    from util import set_preempt_handler
ModuleNotFoundError: No module named 'util'

[twdragon]

Why these changes are not merged till now?

[beduffy]

I have this same problem on ubuntu. Would be nice to merge this fix in, trying to make it work myself but have python 2/3 issues.

I was able to fix it by copying the entire smach_ros library into my directory and doing these changes but it isn't an ideal fix

[mqcmd196]

+1

[130s]

Thank you for contribution. The issue raised in OP must be resolved by #71

Closing.