def http_error_303(self, url, fp, errcode, errmsg, headers, data=None):
        return self.http_error_302(url, fp, errcode, errmsg, headers, data)
:py:obj:`Context.check_privatekey` returns :py:obj:`None` if the
dataset/ETHPy150Open ofermend/medicare-demo/socialite/jython/Lib/urllib.py/FancyURLopener.http_error_303--crossover with--dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/pyopenssl/OpenSSL/test/test_ssl.py/ContextTests.test_check_privatekey_valid