Python 3.7-3.8 compatibility fix

tikuma-lsuhsc · tikuma-lsuhsc · commit 6134ffbc9ee8 · 2022-03-24T20:33:07.000-05:00
diff --git a/src/ffmpegio/plugins/hookspecs.py b/src/ffmpegio/plugins/hookspecs.py
@@ -1,5 +1,7 @@
+from __future__ import annotations
+
 import pluggy
-from typing import Callable, Tuple, Literal
+from typing import Callable, Tuple
 
 hookspec = pluggy.HookspecMarker("ffmpegio")
 
@@ -104,6 +106,7 @@ def device_source_api() -> Tuple[str, dict[str, Callable]]:
     Partial definition is OK
     """
 
+
 @hookspec
 def device_sink_api() -> Tuple[str, dict[str, Callable]]:
     """return a sink name and its set of interface functions
