/kb/query#

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/kb/query Quick Facts

Category

Knowledge and reasoning

Message type

knowledge_core/Query

Perform a simple query against the knowledge base.

See KnowledgeCore documentation for details.

Quick snippets#

Call the service from command-line#
$ rosservice call /kb/query knowledge_core/Query
# (tip: press Tab to complete the message prototype)

How to use in your code#

Call the service from a Python script#
 1#!/usr/bin/env python
 2
 3import rospy
 4from knowledge_core.srv import *
 5
 6if __name__ == "__main__":
 7
 8    rospy.wait_for_service("/kb/query")
 9
10    try:
11        proxy = rospy.ServiceProxy("/kb/query", Query)
12        response = proxy(args...) # check the knowledge_core/Query message type for the expected arguments
13        rospy.loginfo(response)
14
15    except rospy.ServiceException as e:
16        rospy.logerror("Service call failed: %s" % e)