asyncio: Sync with upstream (compat module)
diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
index 75e7c9c..bf3b084 100644
--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -13,6 +13,7 @@
 
 from . import base_events
 from . import base_subprocess
+from . import compat
 from . import constants
 from . import coroutines
 from . import events
@@ -370,7 +371,7 @@
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if self._pipe is not None:
                 warnings.warn("unclosed transport %r" % self, ResourceWarning)
@@ -555,7 +556,7 @@
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if self._pipe is not None:
                 warnings.warn("unclosed transport %r" % self, ResourceWarning)