Rules Engine in C or Python [closed]

Answer 1

ruleby is a rule engine in written in ruby. It was subject of a presentation at rubyhoedown 2008: ruleby-the-rule-engine-for-ruby

Answer 2

Rulecore is indeed written partly in Python. But it does not really matter. You as an user would not see any of these implementation details anyway.

The rules are purely declarative and defined using XML. The XML is sent into ruleCore CEP Server as events using a web services or JMS or other protocols.

Answer 3

In effect, Python is a rules engine.

"The engine will be used as way to automate a house, like turning the light off when somebody leaves a room etc."

You need sensors and controllers. You write your "rules" as ordinary Python objects.

Your main "program" collects events from your sensors and sends events to your controllers.

If you can read from your sensors via ordinary USB, that's even better. The marine industry uses a couple of closely related standards like NMEA 0183 and NMEA 2000 for specifying the traffic on the bus from sensor to controller.

You don't need Yet Another Rules Language. You have Python.

Answer 4

You could look at CLIPS as already suggested or, if you want to pay money or need it Rete2. I've used CLIPS in the past on Unix and sucessfully embedded it into other applications.

Hope this helps.

Answer 5

I know ruleCore has some parts written in Python. But the API uses XML and ActiveMQ or WebServices so it is on a higher abstraction level.

Answer 6

Nebri is the easiest way to write rules for home automation AND other software/machines. Here's an example to accomplish the light shutoff:

class high_temp_shutdown(NebriOS):
    listens_to == ['shared.pebble_location'] 


    def check(self):
        # if pebble dongle is out or room, return true
        return shared.pebble_location > 3 # in meters

    def action(self):
        smartthings.lights(2,"off")

It's a perfect tool for automating your house since you can pip install existing libraries for use in your script. Nest, SmartThings, Sen.se and so on. It's just Python!

And for a fuller explanation of why Python isn't a rules engine by itself, see this article. Just because Python itself can execute rules, you don't have a rules engine on your hands. It's a huge architectural shift in fact.