lasr_rasa

The lasr_rasa package

This package is maintained by:

• Jared

Prerequisites

This package depends on the following ROS packages:

• catkin (buildtool)
• catkin_virtualenv (build)
• rospy (build)
• std_msgs (build)
• rospy (exec)
• std_msgs (exec)

This packages requires Python 3.10 to be present.

This package has 150 Python dependencies:

• requests==2.31.0
• rasa==3.6.5
• spacy==3.6.1
• .. and 148 sub dependencies

Usage

This package provides the /lasr_rasa/parse service which uses the Rasa service definition from lasr_rasa.

from lasr_rasa.srv import Rasa, RasaRequest

# create service proxy
rasa_service = rospy.ServiceProxy('/lasr_rasa/parse', Rasa)

# create request
request = RasaRequest("hello")

# send request
response = rasa_service(request)
# .. use request.json_response, if request.success

Example

1. Create a Rasa assistant.

   roscd lasr_rasa
   mkdir -p assistants/my_new_assistant
   cd assistants/my_new_assistant
   rosrun lasr_rasa rasa init

2. Create a NLU dataset, by defining training examples in /lasr_rasa/assistants/my_new_assistant/data/nlu.yml, for more information see the Rasa docs.

3. Train the NLU assistant.

   rosrun lasr_rasa rasa train nlu

   This will produce a .tar.gz file in lasr_rasa/assistants/my_new_assistant/models.

4. Run Rasa as an API with our newly trained assistant.

   rosrun lasr_rasa rasa run --enable-api

   The API is run on localhost:5005 by default, but you can change the port using the -p argument. The endpoint that we are interested in is /model/parse.

5. Test the API is up and running.

   curl 'localhost:5005/model/parse' -d '{"text" : "Hello"}'

6. Start ROS master if not started already.

   roscore &

7. Run the service

   rosrun lasr_rasa service [PORT]

8. Make a call to the service.

   rosservice call /lasr_rasa/parse "text: 'hello'"

Technical Overview

Ask the package maintainer to write a doc/TECHNICAL.md for their package!

ROS Definitions

Launch Files

rasa

No description provided.

Argument	Default	Description
model

Messages

This package has no messages.

Services

Rasa

Request

Field	Type	Description
text	string

Response

Field	Type	Description
json_response	string
success	bool

Actions

This package has no actions.