def _is_valid_netmask(self, prefixlen):
        try:
            prefixlen = int(prefixlen)
        except ValueError:
            return False
        return 0 <= prefixlen <= self._max_prefixlen
this test checks whether the + and * elemwise ops can handle extremely large numbers of
dataset/ETHPy150Open Exa-Networks/exabgp/lib/exabgp/dep/ipaddress.py/IPv6Network._is_valid_netmask--crossover with--dataset/ETHPy150Open rizar/attention-lvcsr/libs/Theano/theano/sandbox/cuda/tests/test_basic_ops.py/test_many_arg_elemwise