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class WatchListRule:
    '''A rule with instructions to do when the rule is satisified.'''
    def __init__(self, complex_definition, instructions):
        self.definitions_to_match = complex_definition.split('|')
        self._instructions = instructions

    def match(self, matching_definitions):
        for test_definition in self.definitions_to_match:
            if test_definition in matching_definitions:
                return True
        return False

    def instructions(self):
        return self._instructions

    def remove_instruction(self, instruction):
        self._instructions.remove(instruction)