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MAVROS PX4 Error Failed to Import Packaging

asked 2020-04-11 15:10:04 -0500

quadman gravatar image

updated 2020-04-11 18:51:37 -0500

I'm following this tutorial: https://dev.px4.io/v1.9.0/en/ros/

I've run the build scripts: https://raw.githubusercontent.com/PX4...

I've built my catkin workspace using catkin build at ~/catkin_ws , and the command roslaunch mavros px4.launch fcu_url:="udp://:14540@127.0.0.1:14557" runs with no issues.

I've also downloaded the firmware in the directory ~/src/Firmware, but I run into issues when I run the command

DONT_RUN=1 make px4_sitl_default gazebo

At first I got the error ImportError: No module named 'em', Error, but it went away after running pip3 install empy

Now I am getting the error

Failed to import packaging: No module named 'packaging'
You may need to install it using:
pip3 install --user packaging
ninja: build stopped: subcommand failed.
Makefile:198: recipe for target 'px4_sitl_default' failed
make: *** [px4_sitl_default] Error 1

The errors start at:

CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
GSTREAMER_LIBRARIES (ADVANCED)
    linked by target "gazebo_vision_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_uuv_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_lidar_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_geotagged_images_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_controller_interface" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "sensor_msgs" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_sonar_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_opticalflow_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "std_msgs" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_imu_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_opticalflow_mockup_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "mav_msgs" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "nav_msgs" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_wind_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "physics_msgs" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_gimbal_controller_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_mavlink_interface" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_motor_model" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_catapult_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_multirotor_base_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_magnetometer_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_usv_dynamics_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_barometer_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_parachute_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_gst_camera_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_irlock_plugin" in directory /home/christopher/src/Firmware/Tools/sitl_gazebo
    linked by target "gazebo_gps_plugin" in directory /home ...
(more)
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Comments

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Quick comment: Python 3 is not mentioned anywhere in the build script you link. I have no experience with mavros, but ROS Melodic does not support Python 3.

You seem to be using Python 3 (and worked around one issue by installing empy with pip3).

You may want to check the default Python interpreter on your system. Only Python 2 is officially supported in ROS Melodic. ROS Noetic will be the first ROS version to support Python 3 completely.

gvdhoorn gravatar image gvdhoorn  ( 2020-04-11 15:14:39 -0500 )edit

When I run python -V I get 2.7, but I used python 3 to install that package since I have both on my machine.

quadman gravatar image quadman  ( 2020-04-11 15:53:02 -0500 )edit

I think you may be on to something, although python 2.7 is my default, I am getting these errors:

[6/723] Generating serial_params.c FAILED: generated_params/serial_params.c cd /home/christopher/src/Firmware/build/px4_sitl_default/src/lib/parameters && /usr/bin/cmake -E make_directory /home/christopher/src/Firmware/build/px4_sitl_default/generated_params && /usr/bin/python3

It's trying to use python3 for some reason.

quadman gravatar image quadman  ( 2020-04-11 19:06:01 -0500 )edit

I fixed those gstream errors by installing gstream using: sudo apt-get install libgstreamer-plugins-base1.0-dev

quadman gravatar image quadman  ( 2020-04-11 19:07:22 -0500 )edit

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answered 2020-04-11 21:08:58 -0500

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Asked: 2020-04-11 15:10:04 -0500

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Last updated: Apr 11 '20