'hector_quadrotor' 'TypeError: 'instancemethod' object has no attribute '__geitem__''

edit

Hi

I was running "hector_quadrotor_demo outdoor_flight_gazebo.launch". And I build a publisher "auto_fly", to publish message to control the quadrotor. The code is showed below:

#!/usr/bin/env python

import rospy from geometry_msgs.msg import Twist

def auto_fly(): pub= rospy.Publisher('/uav/uav2/cmd_vel',Twist,queue_size=10) rospy.init_node('auto_fly',anonymous=True) r=rospy.Rate(10) # 10Hz

while not rospy.is_shutdown(): pub.publish['x=0,y=1,z=0.2' 'x=0,y=0,z=0'] r.sleep(1.0)

if __name__== '__main__': try: auto_fly() except rospy.ROSInterruptException: pass

When I run it, it shows,

TypeError: 'instancemethod' object has no attribute '__getitem__'

What does this error mean and how to fix it?

Thanks a lot Glen