def _createdir(self):
        try:
            os.makedirs(self._dir)
        except OSError:
            raise EnvironmentError(self._dir % "Cache directory '%s' does not exist and could not be created'")
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/core/cache/backends/filebased.py/CacheClass._createdir/swapped operands of `%`