From 2b50cbb4d3761c5fe03f137deb86fb2b2a6f2aa8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adrian=20W=C3=A4lchli?= <aedu.waelchli@gmail.com>
Date: Fri, 9 Sep 2022 21:08:34 +0200
Subject: [PATCH] Avoid instantiating every accelerator in the registry
 (#14591)

* Avoid instantiating every accelerator in the registry when listing available ones
---
 .../trainer/connectors/accelerator_connector.py               | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/pytorch_lightning/trainer/connectors/accelerator_connector.py b/src/pytorch_lightning/trainer/connectors/accelerator_connector.py
index f3be6caa5b..d50fc86140 100644
--- a/src/pytorch_lightning/trainer/connectors/accelerator_connector.py
+++ b/src/pytorch_lightning/trainer/connectors/accelerator_connector.py
@@ -524,7 +524,9 @@ class AcceleratorConnector:
 
         if not self.accelerator.is_available():
             available_accelerator = [
-                acc_str for acc_str in self._accelerator_types if AcceleratorRegistry.get(acc_str).is_available()
+                acc_str
+                for acc_str in self._accelerator_types
+                if AcceleratorRegistry[acc_str]["accelerator"].is_available()
             ]
             raise MisconfigurationException(
                 f"{self.accelerator.__class__.__qualname__} can not run on your system"