def keys(self):
        return [k for k, v in self._headers]
Yields open file object in the report directory with given name
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/core/servers/basehttp.py/Headers.keys--crossover with--dataset/ETHPy150Open allure-framework/allure-python/allure/common.py/AllureImpl._reportfile