def result_is_file(self):
        wrapper = self.wsgi_file_wrapper
        return wrapper is not None and isinstance(self.result,wrapper)
Given a class, return True if any of the classes it inherits from has a
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/core/servers/basehttp.py/ServerHandler.result_is_file--crossover with--dataset/ETHPy150Open zzzeek/sqlalchemy/lib/sqlalchemy/ext/declarative/api.py/has_inherited_table