patch: Drop support for Python 3.9

Undo the last of 8d15f4a.

* Use a match case statement in place of an if block.
* Replace Union types with X | Y syntax.

Also introduce support for Python 3.14.

Closes #16.

Author: jmgate

.github/workflows/continuous-integration.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
 
       - name: Harden Runner

.readthedocs.yaml

@@ -9,7 +9,7 @@ version: 2
 build:
   os: "ubuntu-22.04"
   tools:
-    python: "3.9"
+    python: "3.10"
 
 # Build documentation in the "doc/" directory with Sphinx.
 sphinx:

README.md

@@ -17,7 +17,7 @@
 [![pre-commit.ci Status](https://results.pre-commit.ci/badge/github/sandialabs/reverse_argparse/master.svg)](https://results.pre-commit.ci/latest/github/sandialabs/reverse_argparse/master)
 [![PyPI - Version](https://img.shields.io/pypi/v/reverse-argparse?label=PyPI)](https://pypi.org/project/reverse-argparse/)
 ![PyPI - Downloads](https://img.shields.io/pypi/dm/reverse-argparse?label=PyPI%20downloads)
-![Python Version](https://img.shields.io/badge/Python-3.9|3.10|3.11|3.12|3.13-blue.svg)
+![Python Version](https://img.shields.io/badge/Python-3.10|3.11|3.12|3.13|3.14-blue.svg)
 [![Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 
 # reverse_argparse

doc/source/index.rst

@@ -66,7 +66,7 @@ reverse_argparse
 .. |PyPI Version| image:: https://img.shields.io/pypi/v/reverse-argparse?label=PyPI
    :target: https://pypi.org/project/reverse-argparse/
 .. |PyPI Downloads| image:: https://img.shields.io/pypi/dm/reverse-argparse?label=PyPI%20downloads
-.. |Python Version| image:: https://img.shields.io/badge/Python-3.9|3.10|3.11|3.12|3.13-blue.svg
+.. |Python Version| image:: https://img.shields.io/badge/Python-3.10|3.11|3.12|3.13|3.14-blue.svg
 .. |Ruff| image:: https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json
    :target: https://github.com/astral-sh/ruff
 

pyproject.toml

@@ -25,11 +25,11 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Software Development",
     "Topic :: Software Development :: Debuggers",
     "Topic :: Software Development :: Documentation",
@@ -44,7 +44,7 @@ Issues = "https://github.com/sandialabs/reverse_argparse/issues"
 
 
 [tool.poetry.dependencies]
-python = ">=3.8"
+python = ">=3.10"
 
 
 [tool.poetry.dev-dependencies]

reverse_argparse/reverse_argparse.py

@@ -114,36 +114,37 @@ def _unparse_action(self, action: Action) -> None:  # noqa: C901, PLR0912
             or self._arg_is_default_and_help_is_suppressed(action)
         ):
             return
-        if action_type == "_AppendAction":
-            self._unparse_append_action(action)
-        elif action_type == "_AppendConstAction":
-            self._unparse_append_const_action(action)
-        elif action_type == "_CountAction":
-            self._unparse_count_action(action)
-        elif action_type == "_ExtendAction":
-            self._unparse_extend_action(action)
-        elif action_type == "_HelpAction":  # pragma: no cover
-            return
-        elif action_type == "_StoreAction":
-            self._unparse_store_action(action)
-        elif action_type == "_StoreConstAction":
-            self._unparse_store_const_action(action)
-        elif action_type == "_StoreFalseAction":
-            self._unparse_store_false_action(action)
-        elif action_type == "_StoreTrueAction":
-            self._unparse_store_true_action(action)
-        elif action_type == "_SubParsersAction":
-            self._unparse_sub_parsers_action(action)
-        elif action_type == "_VersionAction":  # pragma: no cover
-            return
-        elif action_type == "BooleanOptionalAction":
-            self._unparse_boolean_optional_action(action)
-        else:  # pragma: no cover
-            message = (
-                f"{self.__class__.__name__} does not yet support the "
-                f"unparsing of {action_type} objects."
-            )
-            raise NotImplementedError(message)
+        match action_type:
+            case "_AppendAction":
+                self._unparse_append_action(action)
+            case "_AppendConstAction":
+                self._unparse_append_const_action(action)
+            case "_CountAction":
+                self._unparse_count_action(action)
+            case "_ExtendAction":
+                self._unparse_extend_action(action)
+            case "_HelpAction":  # pragma: no cover
+                return
+            case "_StoreAction":
+                self._unparse_store_action(action)
+            case "_StoreConstAction":
+                self._unparse_store_const_action(action)
+            case "_StoreFalseAction":
+                self._unparse_store_false_action(action)
+            case "_StoreTrueAction":
+                self._unparse_store_true_action(action)
+            case "_SubParsersAction":
+                self._unparse_sub_parsers_action(action)
+            case "_VersionAction":  # pragma: no cover
+                return
+            case "BooleanOptionalAction":
+                self._unparse_boolean_optional_action(action)
+            case _:  # pragma: no cover
+                message = (
+                    f"{self.__class__.__name__} does not yet support the "
+                    f"unparsing of {action_type} objects."
+                )
+                raise NotImplementedError(message)
 
     def _arg_is_default_and_help_is_suppressed(self, action: Action) -> bool:
         """

test/test_reverse_argparse.py

@@ -6,9 +6,11 @@
 
 # SPDX-License-Identifier: BSD-3-Clause
 
+from __future__ import annotations
+
 import shlex
 from argparse import SUPPRESS, ArgumentParser, BooleanOptionalAction, Namespace
-from typing import Any, Optional
+from typing import Any
 
 import pytest
 
@@ -128,6 +130,31 @@ def test_strip_first_line() -> None:
     assert strip_first_line("foo\nbar\nbaz") == "bar\nbaz"
 
 
+def remove_pytest_prefix(input_string: str) -> str:
+    """
+    Remove ``-m pytest`` from the start of a space-delimited string.
+
+    In Python 3.14, pytest now uses the ``__main__`` module's
+    ``__file__`` attribute to determine the entry point of the test run.
+    This causes a command line invocation to include the pytest runner's
+    arguments, which we then need to remove before comparing to expected
+    output.
+
+    Args:
+        input_string:  The string to remove the prefix from.
+
+    Returns:
+        The string without the prefix.
+    """
+    return input_string.removeprefix("-m pytest").strip()
+
+
+def test_remove_pytest_prefix() -> None:
+    """Ensure :func:`remove_pytest_prefix` works as expected."""
+    assert remove_pytest_prefix("-m pytest foo bar baz") == "foo bar baz"
+    assert remove_pytest_prefix("-m pytest") == ""
+
+
 @pytest.mark.parametrize("args", COMPLETE_ARGS)
 def test_get_effective_command_line_invocation(
     parser: ArgumentParser, args: str
@@ -143,8 +170,8 @@ def test_get_effective_command_line_invocation(
         "app-nargs2-val --const --app-const1 --app-const2 -vv --ext ext-val1 "
         "ext-val2 ext-val3 --no-bool-opt pos1-val1 pos1-val2 pos2-val"
     )
-    result = strip_first_entry(
-        unparser.get_effective_command_line_invocation()
+    result = remove_pytest_prefix(
+        strip_first_entry(unparser.get_effective_command_line_invocation())
     )
     assert result == expected
 
@@ -293,8 +320,8 @@ def test__arg_is_default_and_help_is_suppressed() -> None:
     parser.add_argument("--suppressed", default=10, help=SUPPRESS)
     namespace = parser.parse_args(shlex.split(""))
     unparser = ReverseArgumentParser(parser, namespace)
-    result = strip_first_entry(
-        unparser.get_effective_command_line_invocation()
+    result = remove_pytest_prefix(
+        strip_first_entry(unparser.get_effective_command_line_invocation())
     )
     assert result == ""
 
@@ -435,7 +462,7 @@ def test__unparse_store_const_action(
     ("args", "expected"), [(shlex.split("--foo"), "    --foo"), ([], None)]
 )
 def test__unparse_store_true_action(
-    args: list[str], expected: Optional[str]
+    args: list[str], expected: str | None
 ) -> None:
     """Ensure ``store_true`` actions are handled appropriately."""
     parser = ArgumentParser()
@@ -450,7 +477,7 @@ def test__unparse_store_true_action(
     ("args", "expected"), [(shlex.split("--foo"), "    --foo"), ([], None)]
 )
 def test__unparse_store_false_action(
-    args: list[str], expected: Optional[str]
+    args: list[str], expected: str | None
 ) -> None:
     """Ensure ``store_false`` actions are handled appropriately."""
     parser = ArgumentParser()
@@ -496,9 +523,7 @@ def test__unparse_append_action(
 @pytest.mark.parametrize(
     ("args", "expected"), [("--foo", "    --foo"), ("", None)]
 )
-def test__unparse_append_const_action(
-    args: str, expected: Optional[str]
-) -> None:
+def test__unparse_append_const_action(args: str, expected: str | None) -> None:
     """Ensure ``append_const`` actions are handled appropriately."""
     parser = ArgumentParser()
     action = parser.add_argument(
@@ -570,8 +595,8 @@ def test__unparse_sub_parsers_action(
     namespace = parser.parse_args(shlex.split(args))
     unparser = ReverseArgumentParser(parser, namespace)
     unparser._unparse_args()
-    result = strip_first_entry(
-        unparser.get_effective_command_line_invocation()
+    result = remove_pytest_prefix(
+        strip_first_entry(unparser.get_effective_command_line_invocation())
     )
     assert result == expected
     result = strip_first_line(unparser.get_pretty_command_line_invocation())
@@ -612,8 +637,8 @@ def test__unparse_sub_parsers_action_nested() -> None:
     namespace = parser.parse_args(shlex.split(args))
     unparser = ReverseArgumentParser(parser, namespace)
     unparser._unparse_args()
-    result = strip_first_entry(
-        unparser.get_effective_command_line_invocation()
+    result = remove_pytest_prefix(
+        strip_first_entry(unparser.get_effective_command_line_invocation())
     )
     assert result == args
     result = strip_first_line(unparser.get_pretty_command_line_invocation())
@@ -646,9 +671,9 @@ def test__unparse_extend_action() -> None:
     ],
 )
 def test__unparse_boolean_optional_action(
-    default: Optional[bool],  # noqa: FBT001
+    default: bool | None,  # noqa: FBT001
     args: str,
-    expected: Optional[str],
+    expected: str | None,
 ) -> None:
     """Ensure ``BooleanOptionalAction`` actions are handled appropriately."""
     parser = ArgumentParser()