@property
    def length(self):
        raise NotImplementedError("(%s).length" % self)
Temporarily enables debug logging, useful in tests, e.g.
dataset/ETHPy150Open sympy/sympy/sympy/series/sequences.py/SeqBase.length--crossover with--dataset/ETHPy150Open openstack/swift/swift/common/ring/builder.py/RingBuilder.debug