Fix Python 3.5 compatibility

2 files changed, 2 insertions, 2 deletions

diff --git a/mpv-test.py b/mpv-test.py
index 3ac8985..b5cfcb0 100755
--- a/mpv-test.py
+++ b/mpv-test.py
@@ -55,7 +55,7 @@ class TestProperties(MpvTestCase):
         while self.m.core_idle:
             time.sleep(0.05)
         for name in sorted(self.m.property_list):
-            if name in ('external-file','input-ipc-server', 'heartbeat-cmd', 'wid', 'input-file'):
+            if name in ('external-file','input-ipc-server', 'heartbeat-cmd', 'wid', 'input-file', 'input-unix-socket'):
                 continue
             name =  name.replace('-', '_')
             with self.subTest(property_name=name), self.swallow_mpv_errors([
diff --git a/mpv.py b/mpv.py
index 882a30b..2b2f73b 100644
--- a/mpv.py
+++ b/mpv.py
@@ -1253,7 +1253,7 @@ class MPV(object):
         """
         def register(cb):
             if name in self._python_streams:
-                raise KeyError(f'Python stream name "{name}" is already registered')
+                raise KeyError('Python stream name "{}" is already registered'.format(name))
             self._python_streams[name] = (cb, size)
             def unregister():
                 if name not in self._python_streams or\