ROS2 how do you publish an int array as a message in python? I get vague "raise TypeError()" when i try

edit

alas, Int32 =/= Int32[]

You'll need to define your publisher to publish arrays (in your case, you can use Int32MultiArray.msg).

In python, (without knowing the contents of self.create_publisher()) that could look something like:

from std_msgs.msg import Int32MultiArray

...

self.publisher = self.create_publisher(
    Int32MultiArray,
    'wheel_settings',
    10)
...

msg = Int32MultiArray()
msg.data = [1, 1, 1]
pub.publish(msg)