add example to set default namespace

examples/settings/update_default_namespace.py

@@ -0,0 +1,21 @@
+from databricks.sdk import WorkspaceClient
+from databricks.sdk.errors import NotFound
+from databricks.sdk.service.settings import DefaultNamespaceSetting, StringMessage
+
+default_catalog = "hive_metastore"
+
+ws = WorkspaceClient()
+default_namespace = ws.settings.default_namespace
+
+# needs to get the etag first, before patching the setting
+try:
+    etag = default_namespace.get().etag
+except NotFound as err:
+    # if not found, the etag is returned in the header
+    etag = err.details[0].metadata.get("etag")
+
+default_namespace.update(
+    allow_missing=True,
+    field_mask="namespace.value",
+    setting=DefaultNamespaceSetting(etag=etag, namespace=StringMessage(default_catalog)),
+)