Drop Python 3.8 (#591)

* Drop Python 3.8

* Refactor more files

* More fixes

* More fixes, ruff ignore

Author: Tinche

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "pypy-3.10"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "pypy-3.10"]
       fail-fast: false
 
     steps:

HISTORY.md

@@ -21,6 +21,7 @@ Our backwards-compatibility policy can be found [here](https://github.com/python
 - Expose {func}`cattrs.cols.mapping_unstructure_factory` through {mod}`cattrs.cols`.
 - Python 3.13 is now supported.
   ([#543](https://github.com/python-attrs/cattrs/pull/543) [#547](https://github.com/python-attrs/cattrs/issues/547))
+- Python 3.8 is no longer supported, as it is end-of-life. Use previous versions on this Python version.
 
 ## 24.1.2 (2024-09-22)
 

docs/defaulthooks.md

@@ -287,13 +287,11 @@ Sets and frozensets are unstructured into the same class.
 {'a': 1}
 ```
 
-Both [_total_ and _non-total_](https://peps.python.org/pep-0589/#totality) TypedDicts are supported, and inheritance between any combination works (except on 3.8 when `typing.TypedDict` is used, see below).
+Both [_total_ and _non-total_](https://peps.python.org/pep-0589/#totality) TypedDicts are supported, and inheritance between any combination works.
 Generic TypedDicts work on Python 3.11 and later, since that is the first Python version that supports them in general.
 
 [`typing.Required` and `typing.NotRequired`](https://peps.python.org/pep-0655/) are supported.
 
-On Python 3.8, using `typing_extensions.TypedDict` is recommended since `typing.TypedDict` doesn't support all necessary features so certain combinations of subclassing, totality and `typing.Required` won't work.
-
 [Similar to _attrs_ classes](customizing.md#using-cattrsgen-generators), un/structuring can be customized using {meth}`cattrs.gen.typeddicts.make_dict_structure_fn` and {meth}`cattrs.gen.typeddicts.make_dict_unstructure_fn`.
 
 ```{doctest}

pyproject.toml

@@ -46,15 +46,14 @@ dependencies = [
     "typing-extensions>=4.12.2",
     "exceptiongroup>=1.1.1; python_version < '3.11'",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 readme = "README.md"
 license = {text = "MIT"}
 keywords = ["attrs", "serialization", "dataclasses"]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: MIT License",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -150,6 +149,8 @@ ignore = [
     "B006",   # mutable argument defaults
     "DTZ001", # datetimes in tests
     "DTZ006", # datetimes in tests
+    "UP006",  # We support old typing constructs at runtime
+    "UP035",  # We support old typing constructs at runtime
 ]
 
 [tool.ruff.lint.pyupgrade]