patch: Drop support for Python 3.9

[jmgate]

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.

Summary by Sourcery

Drop support for Python 3.9 and add compatibility with Python 3.14 while leveraging modern Python 3.10+ syntax throughout the codebase and updating CI, metadata, and docs accordingly.

New Features:

• Add support for Python 3.14

Enhancements:

• Replace lengthy if-elif chain in _unparse_action with match-case
• Switch Union/Optional type hints to PEP 604 X | Y syntax

Build:

• Raise minimum supported Python version to 3.10

CI:

• Remove Python 3.9 and add Python 3.14 in the CI test matrix

Documentation:

• Update Python version classifiers and badge to reflect support for 3.10–3.14

Tests:

• Adjust test type hints to use X | Y syntax instead of Optional or Union

[sourcery-ai]

Reviewer's Guide

This PR removes support for Python 3.9 by raising the minimum Python version to 3.10, adds compatibility for Python 3.14, and modernizes code by replacing a long if-elif action dispatch chain with a match-case statement and updating Union type annotations to the newer | syntax.

Class diagram for updated _unparse_action method dispatch

classDiagram
    class ReverseArgparse {
        +_unparse_action(action: Action)
        +_unparse_append_action(action: Action)
        +_unparse_append_const_action(action: Action)
        +_unparse_count_action(action: Action)
        +_unparse_extend_action(action: Action)
        +_unparse_store_action(action: Action)
        +_unparse_store_const_action(action: Action)
        +_unparse_store_false_action(action: Action)
        +_unparse_store_true_action(action: Action)
        +_unparse_sub_parsers_action(action: Action)
        +_unparse_boolean_optional_action(action: Action)
    }
    ReverseArgparse : _unparse_action uses match-case for dispatch

Loading

File-Level Changes

Change	Details	Files
Replaced if-elif dispatch with match-case	Replaced long if/elif chain for action types with a match-case construct Maintained pragma no-cover behaviors and default NotImplementedError in case _	reverse_argparse/reverse_argparse.py
Updated type annotations in tests to use	syntax	Replaced Optional[T] with T
Bumped Python support and CI configurations	Removed Python 3.9 classifiers and CI jobs, added Python 3.14 entries Updated poetry python requirement to >=3.10 Updated GitHub Actions matrix and README badge to reflect supported versions	pyproject.toml .github/workflows/continuous-integration.yml README.md

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#16	Update pyproject.toml to drop Python 3.9 support and add Python 3.14 support.	✅
#16	Update the badge in README.md to remove Python 3.9 and add Python 3.14.	✅
#16	Update the CI file to remove Python 3.9 and add Python 3.14.	✅
#16	Use the match-case statement in _unparse_args().	✅
#16	Use other Python 3.10+ features in the code where appropriate.	✅

Possibly linked issues

• Drop Support for Python 3.9 #16: The PR drops Python 3.9 support by updating pyproject.toml, CI, README, and uses match-case and X|Y syntax as outlined in the issue.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.01%. Comparing base (5d7c9da) to head (b9e5ffb).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #343      +/-   ##
==========================================
+ Coverage   93.97%   94.01%   +0.03%     
==========================================
  Files           2        2              
  Lines         166      167       +1     
  Branches       37       37              
==========================================
+ Hits          156      157       +1     
  Misses          4        4              
  Partials        6        6              

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