Changelog¶

To be included in v1.4.2.dev0 (if present)¶

An incorrect signature of the __class_getitem__ class method has been fixed, adding a missing class_item argument under Python 3.8 and older.

This change also improves the code coverage of this method that was previously missing – by @webknjaz.

Related issues and pull requests on GitHub: #567, #571.

Rendered issue, PR, and commit links now lead to frozenslist’s repo instead of yarl’s repo.

Related issues and pull requests on GitHub: #573.
On the Contributing docs page, a link to the Towncrier philosophy has been fixed.

Related issues and pull requests on GitHub: #574.

A name of a temporary building directory now reflects that it’s related to frozenslist, not yarl.

Related issues and pull requests on GitHub: #573.

Declared Python 3.12 and PyPy 3.8-3.10 supported officially in the distribution package metadata.

Related issues and pull requests on GitHub: #553.
Replaced the packaging is replaced from an old-fashioned setup.py to an in-tree PEP 517 build backend – by @webknjaz.

Whenever the end-users or downstream packagers need to build frozenlist from source (a Git checkout or an sdist), they may pass a config_settings flag pure-python. If this flag is not set, a C-extension will be built and included into the distribution.

Here is how this can be done with pip:
```
$ python3 -m pip install . --config-settings=pure-python=
```
This will also work with -e | --editable.

The same can be achieved via pypa/build:
```
$ python3 -m build --config-setting=pure-python=
```
Adding -w | --wheel can force pypa/build produce a wheel from source directly, as opposed to building an sdist and then building from it.

Related issues and pull requests on GitHub: #560.

It is now possible to request line tracing in Cython builds using the with-cython-tracing PEP 517 config setting – @webknjaz.

This can be used in CI and development environment to measure coverage on Cython modules, but is not normally useful to the end-users or downstream packagers.

Here’s a usage example:
```
$ python3 -Im pip install . --config-settings=with-cython-tracing=true
```
For editable installs, this setting is on by default. Otherwise, it’s off unless requested explicitly.

The following produces C-files required for the Cython coverage plugin to map the measurements back to the PYX-files:
```
$ python -Im pip install -e .
```
Alternatively, the FROZENLIST_CYTHON_TRACING=1 environment variable can be set to do the same as the PEP 517 config setting.

Related issues and pull requests on GitHub: #560.
Coverage collection has been implemented for the Cython modules – by @webknjaz.

It will also be reported to Codecov from any non-release CI jobs.

Related issues and pull requests on GitHub: #561.
A step-by-step Release Guide guide has been added, describing how to release frozenlist – by @webknjaz.

This is primarily targeting the maintainers.

Related issues and pull requests on GitHub: #563.
Detailed Contributing Guidelines on authoring the changelog fragments have been published in the documentation – by @webknjaz.

Related issues and pull requests on GitHub: #564.

The published source distribution package became buildable under Python 3.12.

Fixed CI runs when creating a new release, where new towncrier versions fail when the current version section is already present.

Updated the CI runs to better check for test results and to avoid deprecated syntax. #327

The published source distribution package became buildable under Python 3.11.

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
Added support for Python 3.10. #227
Started shipping platform-specific wheels with the musl tag targeting typical Alpine Linux runtimes. #227
Started shipping platform-specific arm64 wheels for Apple Silicon. #227

Add support for hashing of a frozen list. #136
Support Python 3.8 and 3.9.
Provide wheels for aarch64, i686, ppc64le, s390x architectures on Linux as well as x86_64.

Dropped support for Python 3.5; only 3.6, 3.7 and 3.8 are supported going forward. #24