#!/usr/bin/env python

class Filter:

    def init(self):
        self.blocked = []
    def filter(self, sequence):
        return [x for x in sequence if x not in self.blocked]

f = Filter()
f.init()
print f.filter([1,2,3])
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"chapter7.2.py" 12L, 214C                                     12,1          All
