module 'roslibpy' has no attribute 'Header'

[pratipo]

I cannot generate a properly built message, apprently

Steps to reproduce the behavior: I have a simulated robot arm in gazebo rostopic pub /arm_controller/command trajectory_msgs/JointTrajectory '{joint_names: ["joint_1","joint_2","jnt_3","joint_4", "joint_5", "joint_6"], points: [{positions:[0.1,-0.5,0.5,0.75,0.0,0.0], time_from_start: [1.0,0.0]}]}' -1 works as expected

i got some code from /tests/test_topic.py

`msg = dict(#header=roslibpy.Header(seq=i, stamp=Time.now(), frame_id='base'), joint_names=["joint_1","joint_2","joint_3","joint_4", "joint_5", "joint_6"], points=[dict( positions=[1.0,0.0,2.0,0.0,1.0,1.0],

velocities=[1,1,1,1,1,1],

                                # accelerations=[],
                                # effort=[],
                                time_from_start=[1.0,0.0])],
                   )
        publisher.publish(roslibpy.Message(msg))
        time.sleep(1)`

i had to remove the header, because i get module 'roslibpy' has no attribute 'Header'

roslibpy.core.Header doesnt work either rostopic echo /arm_controller/command displays the messages, but gazebo is not moving the arm

any ideas? thanks a lot in advance

• OS: linux mint 20
• Python version 3.7.4
• Python package manager pip3

[gonzalocasas]

oh! The header class was just recently implemented and it's not been released (it would work if you run from source). But we're ready to release, so, give me a few minutes and we'll push a new release out.

[gonzalocasas]

@pratipo should be fixed now. Please update to the latest release: roslibpy 1.2.0 to get these feature.

[pratipo]

just to confirm it's working. thanks!