## Creature Project
## CSC323: Group 1: Nora, Terian, Josh, and Jordan
## 4/7/10
## rule.py: Contains methods associated with the class Rule.

class Rule():

    #from Predicate import Predicate
    
    '''Holds a predicate tree and instructions to execute if the predicate holds true'''
    def __init__(self, pred, change):
        '''init(): accepts a predicate and an instructions'''
        self.predicate = pred
        self.nextMove = change

    def apply(self, world, location):
        """returns a boolean, which is whether or not the predicate is true."""
        self.predicate.holds(world, location)

    def toString(self):
        """returns a string representation of the rule object"""
        
    def fromString(self, astr):
        """sets this rule to the rule specified by the serialized string"""