python - ROS2: ImportError: No module named genmsg -

i starting ros2 in alpha phase. while building package ros1_bridge got error:

traceback (most recent call last):   file "bin/ros1_bridge_generate_factories", line 11, in <module>     ros1_bridge import generate_cpp   file "/home/ros/ros2_ws/src/ros2/ros1_bridge/ros1_bridge/__init__.py", line 13, in <module>     import genmsg importerror: no module named 'genmsg' 

this quite strange. on same computer build same code without problem. thing changed: have installed ros kinetic.

i found out in synaptic have 2 different packages of genmsg installed: python-genmsg , ros-kinetic-genmsg. first 1 comes dependency of ros2 second 1 ros. may both necessary. think python-stuff , not familiar python. can run again?

this happens while dependencies installed ros , ros2 on same machine. package python-genmsg , ros-kinetic-genmsg. genmsg can found @ these places:

1. /opt/ros/kinetic/lib/python2.7/dist-packages
2. /usr/lib/python2.7/dist-packages

this bring python run trouble. in respect ros1_bridge shall fit ros kinetic environment python variable pythonpath set kinetic one:

export pythonpath=/opt/ros/kinetic/lib/python2.7/dist-packages/ 

now restart build , build runs now...