Metadata-Version: 2.1
Name: frozenlist
Version: 1.2.0
Summary: A list-like structure which implements collections.abc.MutableSequence
Home-page: https://github.com/aio-libs/frozenlist
Author: Nikolay Kim
Author-email: fafhrd91@gmail.com
Maintainer: Martijn Pieters <mj@zopatista.com>
Maintainer-email: aio-libs@googlegroups.com
License: Apache 2
Project-URL: Chat: Gitter, https://gitter.im/aio-libs/Lobby
Project-URL: CI: Github Actions, https://github.com/aio-libs/frozenlist/actions
Project-URL: Coverage: codecov, https://codecov.io/github/aio-libs/frozenlist
Project-URL: Docs: RTD, https://frozenlist.readthedocs.io
Project-URL: GitHub: issues, https://github.com/aio-libs/frozenlist/issues
Project-URL: GitHub: repo, https://github.com/aio-libs/frozenlist
Platform: UNKNOWN
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Intended Audience :: Developers
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Development Status :: 5 - Production/Stable
Classifier: Operating System :: POSIX
Classifier: Operating System :: MacOS :: MacOS X
Classifier: Operating System :: Microsoft :: Windows
Requires-Python: >=3.6
Description-Content-Type: text/x-rst
License-File: LICENSE

==========
frozenlist
==========

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   :alt: Latest PyPI package version

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   :target: https://frozenlist.readthedocs.io/
   :alt: Latest Read The Docs

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   :alt: Chat on Gitter

Introduction
============

``frozenlist.FrozenList`` is a list-like structure which implements
``collections.abc.MutableSequence``. The list is *mutable* until ``FrozenList.freeze``
is called, after which list modifications raise ``RuntimeError``:


>>> from frozenlist import FrozenList
>>> fl = FrozenList([17, 42])
>>> fl.append('spam')
>>> fl.append('Vikings')
>>> fl
<FrozenList(frozen=False, [17, 42, 'spam', 'Vikings'])>
>>> fl.freeze()
>>> fl
<FrozenList(frozen=True, [17, 42, 'spam', 'Vikings'])>
>>> fl.frozen
True
>>> fl.append("Monty")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "frozenlist/_frozenlist.pyx", line 97, in frozenlist._frozenlist.FrozenList.append
    self._check_frozen()
  File "frozenlist/_frozenlist.pyx", line 19, in frozenlist._frozenlist.FrozenList._check_frozen
    raise RuntimeError("Cannot modify frozen list.")
RuntimeError: Cannot modify frozen list.


FrozenList is also hashable, but only when frozen. Otherwise it also throws a RuntimeError:


>>> fl = FrozenList([17, 42, 'spam'])
>>> hash(fl)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "frozenlist/_frozenlist.pyx", line 111, in frozenlist._frozenlist.FrozenList.__hash__
    raise RuntimeError("Cannot hash unfrozen list.")
RuntimeError: Cannot hash unfrozen list.
>>> fl.freeze()
>>> hash(fl)
3713081631934410656
>>> dictionary = {fl: 'Vikings'} # frozen fl can be a dict key
>>> dictionary
{<FrozenList(frozen=True, [1, 2])>: 'Vikings'}


Installation
------------

::

   $ pip install frozenlist

The library requires Python 3.6 or newer.


Documentation
=============

https://frozenlist.readthedocs.io/

Communication channels
======================

*aio-libs discourse group*: https://aio-libs.discourse.group

Feel free to post your questions and ideas here.

*gitter chat* https://gitter.im/aio-libs/Lobby

Requirements
============

- Python >= 3.6

License
=======

``frozenlist`` is offered under the Apache 2 license.

Source code
===========

The project is hosted on GitHub_

Please file an issue in the `bug tracker
<https://github.com/aio-libs/frozenlist/issues>`_ if you have found a bug
or have some suggestions to improve the library.

.. _GitHub: https://github.com/aio-libs/frozenlist

=========
Changelog
=========

..
    You should *NOT* be adding new change log entries to this file, this
    file is managed by towncrier. You *may* edit previous change logs to
    fix problems like typo corrections or such.
    To add a new change log entry, please see
    https://pip.pypa.io/en/latest/development/contributing/#news-entries
    we named the news folder "changes".

    WARNING: Don't drop the next directive!

.. towncrier release notes start

1.2.0 (2021-10-16)
==================

Features
--------

- ``FrozenList`` now supports being used as a generic type as per PEP 585, e.g. ``frozen_int_list: FrozenList[int]`` (requires Python 3.9 or newer).
  `#172 <https://github.com/aio-libs/frozenlist/issues/172>`_
- Added support for Python 3.10.
  `#227 <https://github.com/aio-libs/frozenlist/issues/227>`_
- Started shipping platform-specific wheels with the ``musl`` tag targeting typical Alpine Linux runtimes.
  `#227 <https://github.com/aio-libs/frozenlist/issues/227>`_
- Started shipping platform-specific arm64 wheels for Apple Silicon.
  `#227 <https://github.com/aio-libs/frozenlist/issues/227>`_


----


1.1.1 (2020-11-14)
==================

Bugfixes
--------

- Provide x86 Windows wheels.
  `#169 <https://github.com/aio-libs/frozenlist/issues/169>`_


----


1.1.0 (2020-10-13)
==================

Features
--------

- Add support for hashing of a frozen list.
  `#136 <https://github.com/aio-libs/frozenlist/issues/136>`_

- Support Python 3.8 and 3.9.

- Provide wheels for ``aarch64``, ``i686``, ``ppc64le``, ``s390x`` architectures on
  Linux as well as ``x86_64``.


----


1.0.0 (2019-11-09)
==================

Deprecations and Removals
-------------------------

- Dropped support for Python 3.5; only 3.6, 3.7 and 3.8 are supported going forward.
  `#24 <https://github.com/aio-libs/frozenlist/issues/24>`_

