bpo-40570: Improve compatibility of uname_result with late-bound .platform (#20015)

* bpo-40570: Improve compatibility of uname_result with late-bound .platform.

* Add test capturing ability to cast uname to a tuple.

1 files changed, 4 insertions, 3 deletions

diff --git a/Lib/platform.py b/Lib/platform.py
index 049c2c6ef2..e9f50ab622 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -798,9 +798,10 @@ class uname_result(
         )
 
     def __getitem__(self, key):
-        if key == 5:
-            return self.processor
-        return super().__getitem__(key)
+        return tuple(iter(self))[key]
+
+    def __len__(self):
+        return len(tuple(iter(self)))
 
 
 _uname_cache = None