Subscriber logic

edit

I can't imagine how can I connect what you are saing with the rospy.Subscriber. I have this:

def callback(data):
    #do something with the data

def listener():
    rospy.Subscriber('key_vel', Twist, callback)

listener is the daemon startup code.

I'm telling you how to do something when the subscriber isn't triggered. Plus, you can't call callback(data) without providing data. You can either make another function which doesn't require the data or provide a predefined piece of data.

yeah, after think a bit and read the whole stackoverflow post I think i get it. Thank you!

If you want to connect it, then try.

rospy.init_node('teleop_list', anonymous=True)
rospy.Subscriber('key_vel', Twist, callback)
def listener():
    #some logic to call a function or spin

t = threading.Thread(target=listener)
t.daemon = True
t.start()

Mark as answered and close if it works.

the thread is called the same time with the Subscriber

def callback(data):
       #
def listener():
    #do smt

def main ():
    rospy.init_node('teleop_list', anonymous=True)
    rospy.Subscriber('key_vel', Twist, callback)

    t = threading.Thread(target=listener)

I got it, with some mods but thank you!!!

Yeah, not sure it would do what you want otherwise.