Micro optimization: move Python version check from function exection time to import time (#236)

* Micro-optimization: move Python version check from function exection time to import time

* Micro-optimization: move Python version check from function exection time to import time

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: asvetlov

async_timeout/__init__.py

@@ -214,17 +214,27 @@ def _on_timeout(self, task: "asyncio.Task[None]") -> None:
         self._state = _State.TIMEOUT
 
 
-def _current_task(loop: asyncio.AbstractEventLoop) -> "Optional[asyncio.Task[Any]]":
-    if sys.version_info >= (3, 7):
+if sys.version_info >= (3, 7):
+
+    def _current_task(loop: asyncio.AbstractEventLoop) -> "Optional[asyncio.Task[Any]]":
         return asyncio.current_task(loop=loop)
-    else:
+
+
+else:
+
+    def _current_task(loop: asyncio.AbstractEventLoop) -> "Optional[asyncio.Task[Any]]":
         return asyncio.Task.current_task(loop=loop)
 
 
-def _get_running_loop() -> asyncio.AbstractEventLoop:
-    if sys.version_info >= (3, 7):
+if sys.version_info >= (3, 7):
+
+    def _get_running_loop() -> asyncio.AbstractEventLoop:
         return asyncio.get_running_loop()
-    else:
+
+
+else:
+
+    def _get_running_loop() -> asyncio.AbstractEventLoop:
         loop = asyncio.get_event_loop()
         if not loop.is_running():
             raise RuntimeError("no running event loop")