[Python3] SyntaxError: invalid syntax def async

[Rayman]

In a fresh noetic container:

$ ros-get
Traceback (most recent call last):
  File "/usr/local/bin/ros-get", line 5, in <module>
    from ros_get.__main__ import main
  File "/usr/local/lib/python3.8/dist-packages/ros_get/__init__.py", line 1, in <module>
    from .commands import install, update, status, list_packages, remove
  File "/usr/local/lib/python3.8/dist-packages/ros_get/commands.py", line 13, in <module>
    from .workspace import ws_file
  File "/usr/local/lib/python3.8/dist-packages/ros_get/workspace.py", line 6, in <module>
    from catkin_tools.metadata import find_enclosing_workspace
  File "/usr/local/lib/python3.8/dist-packages/catkin_tools/metadata.py", line 22, in <module>
    from .common import mkdir_p
  File "/usr/local/lib/python3.8/dist-packages/catkin_tools/common.py", line 23, in <module>
    import trollius as asyncio
  File "/usr/local/lib/python3.8/dist-packages/trollius/__init__.py", line 21, in <module>
    from .base_events import *
  File "/usr/local/lib/python3.8/dist-packages/trollius/base_events.py", line 42, in <module>
    from . import tasks
  File "/usr/local/lib/python3.8/dist-packages/trollius/tasks.py", line 565
    def async(coro_or_future, loop=None):
        ^
SyntaxError: invalid syntax

[Timple]

apt and pip3 versions of catkin_tools are broken for noetic. Workaround is to install like this:
sudo pip3 install git+https://github.com/catkin/catkin_tools.git

[Rayman]

Thanks you!

[Rayman]

The issue is tracked here: catkin/catkin_tools#594

[Timple]

Not sure why this doesn't get more noise. Lots of noetic activity but very little complaints about catkin_tools...

[Rayman]

Haha, could people be still using catkin_make?

[ashwani-rathee]

Thank you for the instructions,it worked :) I first tried apt in ubuntu20.04,then went with pip 3,both unsuccessfull then came here and this one worked well...

[liamreneroy]

@Timple thank you thank you. I dont understand how this isn't documented anywhere else. Really appreciate the tip, cheers

[Timple]

Actually there is a solution at the moment using apt:

sudo apt install python3-catkin-tools python3-osrf-pycommon