From e022d5373d61096967446818469d6f6c4ad4e56f Mon Sep 17 00:00:00 2001
From: Helmut Grohne <helmut@subdivi.de>
Date: Fri, 23 May 2025 07:32:10 +0200
Subject: align HasFileno protocol with asyncvarlink

---
 linuxnamespaces/filedescriptor.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/linuxnamespaces/filedescriptor.py b/linuxnamespaces/filedescriptor.py
index f9460bf..ee96a94 100644
--- a/linuxnamespaces/filedescriptor.py
+++ b/linuxnamespaces/filedescriptor.py
@@ -8,9 +8,15 @@ import os
 import typing
 
 
+# pylint: disable=too-few-public-methods  # It's that one method we describe.
 @typing.runtime_checkable
 class HasFileno(typing.Protocol):
-    def fileno(self) -> int: ...
+    """A typing protocol representing a file-like object and looking up the
+    underlying file descriptor.
+    """
+
+    def fileno(self) -> int:
+        """Return the underlying file descriptor."""
 
 
 FileDescriptorLike = int | HasFileno
-- 
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