:calls: `POST /repos/:owner/:repo/keys <http://developer.github.com/v3/repos/keys>`_
        :param title: string
        :param key: string
        :param read_only: bool
        :rtype: :class:`github.RepositoryKey.RepositoryKey`

def create_key(self, title, key, read_only=False):
        """
        :calls: `POST /repos/:owner/:repo/keys <http://developer.github.com/v3/repos/keys>`_
        :param title: string
        :param key: string
        :param read_only: bool
        :rtype: :class:`github.RepositoryKey.RepositoryKey`
        """
        assert isinstance(title, (str, unicode)), title
        assert isinstance(key, (str, unicode)), key
        assert isinstance(read_only, bool), read_only
        post_parameters = {
            "title": title,
            "key": key,
            "read_only": read_only,
        }
        headers, data = self._requester.requestJsonAndCheck(
            "POST",
            self.url + "/keys",
            input=post_parameters
        )
        return github.RepositoryKey.RepositoryKey(self._requester, headers, data, completed=True)