Can't play bags on Humble - No module named 'yaml'

Programmerino commented 8 months ago

Running a command like ros2 bag play file.mcap causes:

Failed to load entry point 'play': No module named 'yaml'
Traceback (most recent call last):
  File "/nix/store/j9z06lirncbj5xrgj2i6x1w4sabbpj40-python3.11-ros-humble-ros2cli-0.18.7-r1/bin/.ros2-wrapped", line 34, in <module>
    sys.exit(load_entry_point('ros2cli==0.18.7', 'console_scripts', 'ros2')())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/nix/store/j9z06lirncbj5xrgj2i6x1w4sabbpj40-python3.11-ros-humble-ros2cli-0.18.7-r1/lib/python3.11/site-packages/ros2cli/cli.py", line 50, in main
    add_subparsers_on_demand(
  File "/nix/store/j9z06lirncbj5xrgj2i6x1w4sabbpj40-python3.11-ros-humble-ros2cli-0.18.7-r1/lib/python3.11/site-packages/ros2cli/command/__init__.py", line 250, in add_subparsers_on_demand
    extension.add_arguments(
  File "/nix/store/x7kg09f2y5fdcnkb4qs9q64id6fyad1k-python3.11-ros-humble-ros2bag-0.15.8-r1/lib/python3.11/site-packages/ros2bag/command/bag.py", line 26, in add_arguments
    add_subparsers_on_demand(
  File "/nix/store/j9z06lirncbj5xrgj2i6x1w4sabbpj40-python3.11-ros-humble-ros2cli-0.18.7-r1/lib/python3.11/site-packages/ros2cli/command/__init__.py", line 237, in add_subparsers_on_demand
    extension = command_extensions[name]
                ~~~~~~~~~~~~~~~~~~^^^^^^
KeyError: 'play'

I have with pkgs.rosPackages.humble; [ros2cli ros2run rviz2 rosbag2] added to my devShell packages.

wentasah commented 8 months ago

Yes, the package lacks the dependency on Python's yaml package. I've submitted an upstream PR to add it. Before it propagates to ROS releases, you can just add python3Packages.pyyaml to you devShell to resolve this issue.

Programmerino commented 8 months ago

Thank you for taking the initiative! I'll use your workaround until then.

lopsided98 / nix-ros-overlay

Can't play bags on Humble - No module named 'yaml' #324