fix: preserve wrapped retry client attributes

pymemcache/client/retrying.py

@@ -153,9 +153,10 @@ def _retry(self, name, func, *args, **kwargs):
     # strictly defined for ourselves and pass it on to whatever client we've
     # been given.
     def __getattr__(self, name):
-        return lambda *args, **kwargs: self._retry(
-            name, self._client.__getattribute__(name), *args, **kwargs
-        )
+        attribute = getattr(self._client, name)
+        if not callable(attribute):
+            return attribute
+        return lambda *args, **kwargs: self._retry(name, attribute, *args, **kwargs)
 
     # We implement these explicitly because they're "magic" functions and won't
     # get passed on by __getattr__.

pymemcache/test/test_client_retry.py

@@ -164,6 +164,18 @@ def test_dir_passthrough(self):
 
         assert dir(base) == dir(client)
 
+    @pytest.mark.parametrize("attribute", ["server", "ignore_exc", "sock"])
+    def test_attribute_passthrough(self, attribute):
+        base = self.make_base_client([])
+        client = RetryingClient(base)
+        assert getattr(client, attribute) is getattr(base, attribute)
+
+    def test_missing_attribute(self):
+        client = self.make_client([])
+        assert not hasattr(client, "missing_method")
+        with pytest.raises(AttributeError):
+            client.missing_method
+
     def test_retry_dict_set_is_supported(self):
         client = self.make_client([b"UNKNOWN\r\n", b"STORED\r\n"])
         client[b"key"] = b"value"