diff --git a/docs/differences/python_39.rst b/docs/differences/python_39.rst
index 023c6d7c1..f68abc507 100644
--- a/docs/differences/python_39.rst
+++ b/docs/differences/python_39.rst
@@ -11,30 +11,30 @@ and a detailed description of the changes can be found in
.. table::
:widths: 20 60 20
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | **Features** | | **Status** |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 573 `_ | Fast access to module state from methods of C | |
- | | extension types | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 584 `_ | Union operators added to dict | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 585 `_ | Type hinting generics in standard collections | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 593 `_ | Flexible function and variable annotations | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 602 `_ | CPython adopts an annual release cycle. Instead of | |
- | | annual, aiming for two month release cycle | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 614 `_ | Relaxed grammar restrictions on decorators | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 615 `_ | The IANA Time Zone Database is now present in the | |
- | | standard library in the zoneinfo module | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 616 `_ | String methods to remove prefixes and suffixes | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
- | `PEP 617 `_ | CPython now uses a new parser based on PEG | |
- +--------------------------------------------------------+----------------------------------------------------+--------------+
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | **Features** | | **Status** |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 573 `_ | Fast access to module state from methods of C | Not relevant |
+ | | extension types | |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 584 `_ | Union operators added to dict | Complete [#pep584]_ |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 585 `_ | Type hinting generics in standard collections | |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 593 `_ | Flexible function and variable annotations | |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 602 `_ | CPython adopts an annual release cycle. Instead of | Not relevant |
+ | | annual, aiming for two month release cycle | |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 614 `_ | Relaxed grammar restrictions on decorators | |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 615 `_ | The IANA Time Zone Database is now present in the | |
+ | | standard library in the zoneinfo module | |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 616 `_ | String methods to remove prefixes and suffixes | |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
+ | `PEP 617 `_ | CPython now uses a new parser based on PEG | Not relevant |
+ +--------------------------------------------------------+----------------------------------------------------+----------------------+
Other Language Changes:
@@ -128,3 +128,7 @@ Changes to built-in modules:
| Previously, *sys.stderr* was block-buffered when non-interactive. Now stderr defaults to always being | |
| line-buffered | |
+---------------------------------------------------------------------------------------------------------------+---------------+
+
+.. rubric:: Notes
+
+.. [#pep584] PEP 584 ``dict`` union operator is only available on MicroPython builds with ``MICROPY_CPYTHON_COMPAT`` enabled.