lab 1 intelligent information systems .pptx

Intelligent information system

1. Intelligent information systems “ lab1”

2. Expert Systems

3. How To Implement an expert system CLIPS Python

4. CLIPS   a rule‑based programming language Written in C  CLIPS is an abbreviation to the C Language Integrated Production System useful for creating expert systems and other programs where a heuristic solution is easier to implement and maintain than an algorithmic solution

5. Experta Pyknow Experta is a Python library for building expert systems strongly inspired by  CLIPS the goal of making it easy for the CLIPS programmer to transfer all of his/her knowledge to this platform.  Difference between CLIPS and Experta CLIPS is a programming language, Experta is a Python library. CLIPS is written in C, Experta in Python In CLIPS you add facts using  assert , in Python  we use  declare  instead 

6. Experta Installation To install Experta , run this command in your terminal : pip install experta Pip  python installer package

7. Facts Facts  are the basic unit of information of Experta . They are used by the system to reason about the problem. The class Fact is a subclass of dict. from experta import * f = Fact(a=1 , b=2 )

8. Facts In contrast to  dict , you can create a Fact without keys (only values), and Fact will create a numeric index for your values . f2 = Fact(' x','y','z ') You can mix autonumeric values with key-values, but autonumeric must be declared first : f3 = Fact(' x','y','z',a =1,b=2)

9. Facts You can subclass  Fact  to express different kinds of data or extend it with your custom functionality . class Alert(Fact): """The alert level.""" pass class Status(Fact): """The system status.""" pass f1 = Alert( 'red‘, ‘noise’) f2 = Status('critical')

10. Rules In Experta a rule is a callable, decorated with Rule . @Rule Rules have two components, LHS (left-hand-side) and RHS (right-hand-side). The LHS describes (using patterns) the conditions on which the rule should be executed (or fired). The RHS is the set of actions to perform when the rule is fired.

11. Rules @Rule(Fact('animal', family=' felinae ')) # This is the LHS def match_with_cats (): # This is the RHS """ Match with every `Fact` which: * f[0] == 'animal' * f['family'] == ' felinae ' """ print("Meow!")

12. Rules