Rosservice only works on shell and not on rospy
Hi, It's my first post here so i hope everything's ok.
I have my robot "snake" in gazebo simulation already spawned and if i type in the shell
rosservice call /gazebo/delete_model "model_name: 'snake'"
it actually delete the snake. But if i run a python script with the following code:
delsnake = DeleteModel()
delsnake.model_name = 'snake'
delete = rospy.ServiceProxy('delete_model', DeleteModel)
delete(delsnake)
or even
delete = rospy.ServiceProxy('delete_model', DeleteModel)
delete(model_name = 'snake')
which should be equivalent the terminal tells me:
raise ServiceException("service [%s] unavailable"%self.resolved_name)
rospy.service.ServiceException: service [/delete_model] unavailable
But the service is avaible! I cannot find a solution, the only thing i could do is actually run the command line from the python script but i don't think that's the way thing should go.
Can you help me please?
Thanks in advace!
Asked by abcamiletto on 2019-11-22 01:42:09 UTC
Answers
Your service name is missing the gazebo/ prefix and the first code isn't equivalent to the second one because you need to specify the argument as a string. Here a working code to call the service :
# you can also do this before :
# rospy.wait_for_service("/gazebo/delete_model") to ensure the service is available
delete = rospy.ServiceProxy("/gazebo/delete_model", DeleteModel)
try:
delete(model_name = "snake")
# or simply delete("snake")
except rospy.ServiceException as exc:
print("Service did not process request: " + str(exc))
Asked by Delb on 2019-11-22 05:37:31 UTC
Comments
Mhhh with your code now it tells me:
File "/home/andrea/Desktop/simsnake/src/killnspawn/launch/kns.py", line 12, in <module>
delete = rospy.ServiceProxy("/gazebo/delete_model", DeleteModel)
NameError: name 'DeleteModel' is not defined
Asked by abcamiletto on 2019-11-22 11:54:01 UTC
Have you still the import at the beginning ?
from gazebo_msgs import DeleteModel
Asked by Delb on 2019-11-22 19:24:57 UTC
Comments