def __init__(self, privateKeyFileName, certificateFileName,
                 sslmethod=SSL.SSLv23_METHOD, _contextFactory=SSL.Context):
        self.privateKeyFileName = privateKeyFileName
        self.certificateFileName = certificateFileName
        self.sslmethod = sslmethod
        self._contextFactory = _contextFactory

        # Create a context object right now.  This is to force validation of
        # the given parameters so that errors are detected earlier rather
        # than later.
        self.cacheContext()
@param privateKeyFileName: Name of a file containing a private key
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/internet/ssl.py/DefaultOpenSSLContextFactory.__init__