def __init__(self, package, version):
        """Construct a new requirement.

        :param package: the package name.
        :param version: a semver compatible version specification.
        """
        self.package = package
        self.version = version
        if self.version and not re.match(r"[<=>~]", version[:2]):
            self.version = "=={}".format(self.version)
def _load_from_data(self, data):
        self._replay_data = data
        self._verify_toplevel_json(self._replay_data)

        self._rpms = self._replay_data.get("rpms", [])
        self._assert_type(self._rpms, list, "rpms", "array")

        self._groups = self._replay_data.get("groups", [])
        self._assert_type(self._groups, list, "groups", "array")

        self._environments = self._replay_data.get("environments", [])
        self._assert_type(self._environments, list, "environments", "array")