Improve Python 2 only syntax detection (GH-2592)

[etc/vim.git] / src / black / concurrency.py

diff --git a/src/black/concurrency.py b/src/black/concurrency.py
index 69d79f534e82fc32267e61a1a10e319ca51585bd..24f67b62f0617f79ab21fa9b036645338a4feb8e 100644 (file)
--- a/src/black/concurrency.py
+++ b/src/black/concurrency.py
@@ -42,9 +42,12 @@ def shutdown(loop: asyncio.AbstractEventLoop) -> None:
 
         for task in to_cancel:
             task.cancel()
 
         for task in to_cancel:
             task.cancel()

-        loop.run_until_complete(
-            asyncio.gather(*to_cancel, loop=loop, return_exceptions=True)
-        )
+        if sys.version_info >= (3, 7):
+            loop.run_until_complete(asyncio.gather(*to_cancel, return_exceptions=True))
+        else:
+            loop.run_until_complete(
+                asyncio.gather(*to_cancel, loop=loop, return_exceptions=True)
+            )

     finally:
         # `concurrent.futures.Future` objects cannot be cancelled once they
         # are already running. There might be some when the `shutdown()` happened.
     finally:
         # `concurrent.futures.Future` objects cannot be cancelled once they
         # are already running. There might be some when the `shutdown()` happened.