Unable to run the python file red_light_green_light.py

[ibrahimqazi]

Hello
My Gazebo simulation is running already and the topic /cmd_vel_mux/input/teleop is there but when I run ./red_light_green_light.py cmd_vel:=cmd_vel_mux/input/teleop there is displayed nothing. Like this:

ibrahim@ibrahim-aspire-v5-591g:~/catkin_workspaces/ros_python_ws/src/wanderbot/src$ ./red_light_green_light.py cmd_vel:=cmd_vel_mux/input/teleop
ibrahim@ibrahim-aspire-v5-591g:~/catkin_workspaces/ros_python_ws/src/wanderbot/src$ 

Can anyone help me to point out the problem ?
Thanks

[ktro2828]

maybe you should change
if light_change_time < rospy.Time.now():
not
>
it works for me!!

[ibrahimqazi]

maybe you should change
if light_change_time < rospy.Time.now():
not
>
it works for me!!

Thank you it worked.

[jacobsayono]

running mine on noetic.
i installed turtlebot3 for noetic (book's version is turtlebot for indigo)...
mine worked if i do:
~/wanderbot_ws $ roslaunch turtlebot3_gazebo turtlebot3_world.launch
and then:
~/wanderbot_ws/src/wanderbot/src $ ./red_light_green_light.py
without the cmd_vel stuff!