def handle_app(self, app, **options):
        raise NotImplementedError()
Is float property empty.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/core/management/base.py/AppCommand.handle_app--crossover with--dataset/ETHPy150Open CollabQ/CollabQ/.google_appengine/google/appengine/ext/db/__init__.py/FloatProperty.empty