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[ANN] PyYAML-5.3: YAML parser and emitter for Python

Announcing PyYAML-5.3

A new release of PyYAML is now available:

This release contains some bugfixes (handling of slots, enable unicode for
maxunicode < 0xffff, enable large files), enhancements (create timezone
aware datetimes) and some other small enhancements.


* -- Use `is` instead of equality for comparing with `None`
* -- fix typos and stylistic nit
* -- Fix up small typo
* -- Fix handling of __slots__
* -- Allow calling add_multi_constructor with None
* -- Add use of safe_load() function in README
* -- Fix reader for Unicode code points over 0xFFFF
* -- Enable certain unicode tests when maxunicode not > 0xffff
* -- Use full_load in yaml-highlight example
* -- Document that PyYAML is implemented with Cython
* -- Fix for Python 3.10
* -- increase size of index, line, and column fields
* -- remove some unused imports
* -- Create timezone-aware datetimes when parsed as such
* -- Add tests for timezone


PyYAML IRC Channel: #pyyaml on
PyYAML homepage:
PyYAML documentation:
Source and binary installers:
GitHub repository:
Bug tracking:

YAML homepage:
YAML-core mailing list:

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

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.


>>> import yaml

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

>>> print(yaml.dump(_))
name: PyYAML
description: YAML parser and emitter for Python
keywords: [YAML, serialization, configuration, persistence, pickle]


The following people are currently responsible for maintaining PyYAML:

* Ingy d?t Net
* Tina Mueller
* Matt Davis

and many thanks to all who have contribributed!


Copyright (c) 2017-2019 Ingy d?t Net <ingy at>
Copyright (c) 2006-2016 Kirill Simonov <xi at>

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

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