[ANN] PyYAML-5.4 Released

[Matt Davis]

=====================
Announcing PyYAML-5.4
=====================

A new release of PyYAML is now available:
https://github.com/yaml/pyyaml/releases/tag/5.4

This release contains a security fix for CVE-2020-14343. It removes the
python/module, python/object, and python/object/new tags from the
FullLoader. YAML that uses these tags must be loaded by UnsafeLoader, or a
custom loader that has explicitly enabled them.

This release also adds Python wheels for manylinux1 (x86_64) and MacOS
(x86_64) with the libyaml extension included (built on libyaml 0.2.5).

PyYAML 5.4 will be the last release to support Python 2.7 (except for
possible critical bug fix releases).


Changes
=======

* https://github.com/yaml/pyyaml/pull/407 -- build modernization, remove
distutils, fix metadata, build wheels, CI to GHA
* https://github.com/yaml/pyyaml/pull/472 -- fix for CVE-2020-14343, moves
arbitrary python tags to UnsafeLoader
* https://github.com/yaml/pyyaml/pull/441 -- fix memory leak in implicit
resolver setup
* https://github.com/yaml/pyyaml/pull/392 -- fix py2 copy support for
timezone objects
* https://github.com/yaml/pyyaml/pull/378 -- fix compatibility with Jython


Resources
=========

PyYAML IRC Channel: #pyyaml on irc.freenode.net
PyYAML homepage: https://github.com/yaml/pyyaml
PyYAML documentation: http://pyyaml.org/wiki/PyYAMLDocumentation
Source and binary installers: https://pypi.org/project/PyYAML/
GitHub repository: https://github.com/yaml/pyyaml/
Bug tracking: https://github.com/yaml/pyyaml/issues

YAML homepage: http://yaml.org/
YAML-core mailing list:
http://lists.sourceforge.net/lists/listinfo/yaml-core


About PyYAML
============

YAML is a data serialization format designed for human readability and
interaction with scripting languages. PyYAML is a YAML parser and emitter
for Python.

PyYAML features a complete YAML 1.1 parser, Unicode support, pickle
support, capable extension API, and sensible error messages. PyYAML
supports standard YAML tags and provides Python-specific tags that allow to
represent an arbitrary Python object.

PyYAML is applicable for a broad range of tasks from complex configuration
files to object serialization and persistence.


Example
=======

```
>>> import yaml

>>> yaml.full_load("""
... name: PyYAML
... description: YAML parser and emitter for Python
... homepage: https://github.com/yaml/pyyaml
... keywords: [YAML, serialization, configuration, persistence, pickle]
... """)
{'keywords': ['YAML', 'serialization', 'configuration', 'persistence',
'pickle'], 'homepage': 'https://github.com/yaml/pyyaml', 'description':
'YAML parser and emitter for Python', 'name': 'PyYAML'}

>>> print(yaml.dump(_))
name: PyYAML
homepage: https://github.com/yaml/pyyaml
description: YAML parser and emitter for Python
keywords: [YAML, serialization, configuration, persistence, pickle]
```

Maintainers
===========

The following people are currently responsible for maintaining PyYAML:

* Ingy döt Net
* Matt Davis

and many thanks to all who have contributed!
See: https://github.com/yaml/pyyaml/pulls


Copyright
=========

Copyright (c) 2017-2021 Ingy döt Net <ingy at ingy.net>
Copyright (c) 2006-2016 Kirill Simonov <xi at resolvent.net>

The PyYAML module was written by Kirill Simonov <xi at resolvent.net>.
It is currently maintained by the YAML and Python communities.

PyYAML is released under the MIT license.
See the file LICENSE for more details.