I want to publish 3 ints as a message but i'm getting this vague error that I'm not sure how to solve this.
This is the relevant bit of my code:
self.publisher = self.create_publisher(
Int32,
'wheel_settings',
10)
#test publishing wheel settings
self.publisher.publish([1, 1, 1])
Error: "raise TypeError()"
How do I fix this? P
Originally posted by rydb on ROS Answers with karma: 125 on 2021-04-30
Post score: 0
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)
Originally posted by shonigmann with karma: 1567 on 2021-05-03
This answer was ACCEPTED on the original site
Post score: 2
Comment by rydb on 2021-05-04:
Yep, this fixes it. I wish error handling for this was more specific like "error: expected type x, got type y" or something though.
