Method insertfilter

Lib/idlelib/percolator.py:34–39

(self, filter)

        self.top.delete(index1, index2)

    def insertfilter(self, filter):
        # Perhaps rename to pushfilter()?
        assert isinstance(filter, Delegator)
        assert filter.delegate is None
        filter.setdelegate(self.top)
        self.top = filter

    def insertfilterafter(self, filter, after):
        assert isinstance(filter, Delegator)