def _is_valid_netmask(self, prefixlen):
        try:
            prefixlen = int(prefixlen)
        except ValueError:
            return False
        return 0 <= prefixlen <= self._max_prefixlen
Returns this form rendered as HTML <p>s.
dataset/ETHPy150Open anandology/pyjamas/pyjs/src/pyjs/lib/ipaddr.py/IPv6Network._is_valid_netmask--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-0.96/django/newforms/forms.py/BaseForm.as_p