PEP: 537
Title: Python 3.7 Release Schedule
Version: $Revision$
Last-Modified: $Date$
Author: Ned Deily <nad@python.org>
Status: Active
Type: Informational
Content-Type: text/x-rst
Created: 23-Dec-2016
Python-Version: 3.7


Abstract
========

This document describes the development and release schedule for
Python 3.7.  The schedule primarily concerns itself with PEP-sized
items.

.. Small features may be added up to the first beta
   release.  Bugs may be fixed until the final release,
   which is planned for 2018-06.


Release Manager and Crew
========================

- 3.7 Release Manager: Ned Deily
- Windows installers: Steve Dower
- Mac installers: Ned Deily
- Documentation: Julien Palard


3.7 Lifespan
============

3.7 will receive `bugfix updates <https://devguide.python.org/devcycle/#maintenance-branches>`_
approximately every 3 months for about 24 months. Sometime after the release of
3.8.0 final, a final 3.7 bugfix update will be released.
After that, it is expected that
`security updates <https://devguide.python.org/devcycle/#security-branches>`_
(source only) will be released as needed until 5 years after
the release of 3.7 final, so until approximately 2023-06.


Release Schedule
================

3.7.0 schedule
--------------

- 3.7 development begins: 2016-09-12
- 3.7.0 alpha 1: 2017-09-19
- 3.7.0 alpha 2: 2017-10-17
- 3.7.0 alpha 3: 2017-12-05
- 3.7.0 alpha 4: 2018-01-09
- 3.7.0 beta 1: 2018-01-31
  (No new features beyond this point.)
- 3.7.0 beta 2: 2018-02-27
- 3.7.0 beta 3: 2018-03-29
- 3.7.0 beta 4: 2018-05-02
- 3.7.0 beta 5: 2018-05-30
- 3.7.0 candidate 1: 2018-06-12
- 3.7.0 final: 2018-06-27

3.7.1 schedule (first bugfix release)
-------------------------------------

- 3.7.1 candidate 1: 2018-09-26
- 3.7.1 candidate 2: 2018-10-13
- 3.7.1 final: 2018-10-20

3.7.2 schedule
--------------

- 3.7.2 candidate 1: 2018-12-11
- 3.7.2 final: 2018-12-24

3.7.3 schedule
--------------

- 3.7.3 candidate 1: 2019-03-12
- 3.7.3 final: 2019-03-25

3.7.4 schedule
--------------

- 3.7.4 candidate 1: 2019-06-18
- 3.7.4 candidate 2: 2019-07-02
- 3.7.4 final: 2019-07-08

3.7.5 schedule
--------------

- 3.7.5 candidate 1: 2019-10-02
- 3.7.5 final: 2019-10-15

3.7.6 schedule
--------------

- 3.7.6 candidate 1: 2019-12-11
- 3.7.6 final: 2019-12-18

3.7.7 schedule
--------------

- 3.7.7 candidate 1: 2020-03-04
- 3.7.7 final: 2020-03-10

3.7.8 schedule (last bugfix release)
------------------------------------

Last planned release of binaries

- 3.7.8 candidate 1: 2020-06-15
- 3.7.8 final: 2020-06-27

3.7.9 schedule (security/binary release)
----------------------------------------

Security fixes plus updated binary installers
to address 3.7.8 issues; no further binary
releases are planned.

- 3.7.9 final: 2020-08-17

3.7.10 and beyond schedule
--------------------------

Security fixes only, as needed, until 2023-06

- TBD


Features for 3.7
================

Implemented PEPs for 3.7 (as of 3.7.0 beta 1):

* :pep:`538`, Coercing the legacy C locale to a UTF-8 based locale
* :pep:`539`, A New C-API for Thread-Local Storage in CPython
* :pep:`540`, ``UTF-8`` mode
* :pep:`552`, Deterministic ``pyc``
* :pep:`553`, Built-in breakpoint()
* :pep:`557`, Data Classes
* :pep:`560`, Core support for typing module and generic types
* :pep:`562`, Module ``__getattr__`` and ``__dir__``
* :pep:`563`, Postponed Evaluation of Annotations
* :pep:`564`, Time functions with nanosecond resolution
* :pep:`565`, Show DeprecationWarning in __main__
* :pep:`567`, Context Variables

Copyright
=========

This document has been placed in the public domain.



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