PyKnow: Expert Systems for Python

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PyKnow is a Python library for building expert systems strongly inspired by CLIPS_.

.. code-block:: python

from random import choice from pyknow import *

class Light(Fact): """Info about the traffic light.""" pass

class RobotCrossStreet(KnowledgeEngine): @Rule(Light(color='green')) def green_light(self): print("Walk")

   @Rule(Light(color='red'))
   def red_light(self):
       print("Don't walk")

   @Rule(AS.light << Light(color=L('yellow') | L('blinking-yellow')))
   def cautious(self, light):
       print("Be cautious because light is", light["color"])

.. code-block:: python

engine = RobotCrossStreet() engine.reset() engine.declare(Light(color=choice(['green', 'yellow', 'blinking-yellow', 'red']))) engine.run() Be cautious because light is blinking-yellow

You can find some more examples on GitHub_.

.. _CLIPS: http://clipsrules.sourceforge.net .. _GitHub: https://github.com/buguroo/pyknow/tree/develop/docs