Py3.3 or higher for now.

Author: Lukasa

hyper/__init__.py

@@ -8,3 +8,8 @@
 """
 from .http20.connection import HTTP20Connection
 from .http20.response import HTTP20Response
+
+# Throw import errors on Python 2.
+import sys as _sys
+if _sys.version_info[0] < 3 or _sys.version_info[1] < 3:
+    raise ImportError("hyper only supports Python 3.3 or higher.")