def discard(self, rule, count=<NUM_LIT:1>):
assert isinstance(rule, ClassifierRule)<EOL>assert isinstance(count, int) and count >= <NUM_LIT:0><EOL>rule = self.get(rule)<EOL>if rule is None:<EOL><INDENT>return False<EOL><DEDENT>rule.numerosity -= count<EOL>if rule.numerosity <= <NUM_LIT:0>:<EOL><INDENT>rule.numerosity = <NUM_LIT:0><EOL>del self._population[rule.condition][rule.action]<EOL>if not self._population[rule.condition]:<EOL><INDENT>del self._population[rule.condition]<EOL><DEDENT>return True<EOL><DEDENT>return False<EOL>
Remove one or more instances of a rule from the classifier set.
        Return a Boolean indicating whether the rule's numerosity dropped
        to zero. (If the rule's numerosity was already zero, do nothing and
        return False.)

        Usage:
            if rule in model and model.discard(rule, count=3):
                print("Rule numerosity dropped to zero.")

        Arguments:
            rule: A ClassifierRule instance whose numerosity is to be
                decremented.
            count: An int, the size of the decrement to the rule's
                numerosity; default is 1.
        Return:
            A bool indicating whether the rule was removed altogether from
            the classifier set, as opposed to simply having its numerosity
            decremented.