import * from zerolife

class Rule():
    '''A rule class: holds a predicate and a list of actions to execute if
       the predicate holds true'''
    def __init__(self, pred, instruction):
        '''init(): accepts a predicate and an action'''
        self.Predicate = pred
        self.Instructions = instruction
        
        
    def holds(self, board, coordinates):
        '''If the predicate resolves as true, returns true,
           otherwise returns false.'''
        if self.Predicate.holds(self):
            return True
        else:
            return False

    def getInstructions(self):
    '''packs instruction object'''
        self.packedInstructions = []
        for each i in Instructions:
            packedInstructions.append(instruction.pack(coordinates))
        return packedInstructions