bpo-42317: Improve docs of typing.get_args concerning Union

Dominik1123 · Dominik1123 · commit 5a5ff4d75ee6 · 2020-11-12T21:32:07.000+01:00
diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst
@@ -1706,6 +1706,8 @@ Introspection helpers
    For a typing object of the form ``X[Y, Z, ...]`` these functions return
    ``X`` and ``(Y, Z, ...)``. If ``X`` is a generic alias for a builtin or
    :mod:`collections` class, it gets normalized to the original class.
+   If ``X`` is a :class:`Union`, the order of ``(Y, Z, ...)`` may be different
+   from the order of the original arguments ``[Y, Z, ...]``.
    For unsupported objects return ``None`` and ``()`` correspondingly.
    Examples::
 
