can't overrride and(), or() (and invert()?)

from sqlalchemy import Integer, TypeDecorator, Column, type_coerce

class Foo(TypeDecorator):
    impl = Integer

    class comparator_factory(TypeDecorator.Comparator):
        def __eq__(self, other):
            print "EQ!"
            return type_coerce(self.expr, Integer) == other

        def __and__(self, other):
            print "AND!"
            return type_coerce(self.expr, Integer) & other


c = Column('x', Foo())

print c == 5
print c & 2

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