Issue #9343: Document that argparse parent parsers must be configured before their children.
diff --git a/Doc/library/argparse.rst b/Doc/library/argparse.rst
index 102b3e9..2164ec0 100644
--- a/Doc/library/argparse.rst
+++ b/Doc/library/argparse.rst
@@ -351,6 +351,11 @@
:class:`ArgumentParser` will see two ``-h/--help`` options (one in the parent
and one in the child) and raise an error.
+.. note::
+ You must fully initialize the parsers before passing them via ``parents=``.
+ If you change the parent parsers after the child parser, those changes will
+ not be reflected in the child.
+
formatter_class
^^^^^^^^^^^^^^^
diff --git a/Misc/NEWS b/Misc/NEWS
index 4638fd7..babee78 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -162,6 +162,9 @@
- Issue #8982: Improve the documentation for the argparse Namespace object.
+- Issue #9343: Document that argparse parent parsers must be configured before
+ their children.
+
Build
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