Small speedup to unifiprotect attribute lookups (#93507)

homeassistant/components/unifiprotect/utils.py

@@ -41,18 +41,16 @@ from .const import (
 
 def get_nested_attr(obj: Any, attr: str) -> Any:
     """Fetch a nested attribute."""
-    attrs = attr.split(".")
+    if "." not in attr:
+        value = getattr(obj, attr, None)
+    else:
+        value = obj
+        for key in attr.split("."):
+            if not hasattr(value, key):
+                return None
+            value = getattr(value, key)
 
-    value = obj
-    for key in attrs:
-        if not hasattr(value, key):
-            return None
-        value = getattr(value, key)
-
-    if isinstance(value, Enum):
-        value = value.value
-
-    return value
+    return value.value if isinstance(value, Enum) else value
 
 
 @callback