Merge pull request 'MIL-004 Documentation and release: README, checks and reviews' (#27) from mil-004-docs-release into main

Reviewed-on: #27

README.md

@@ -1,2 +1,100 @@
-# 014-higher_lower
+# Higher Lower
 
+A console game from Udemy's *100 Days of Code: The Complete Python Pro Bootcamp*
+(day 14). Two Instagram accounts are shown. Guess which one has more followers.
+Every right guess adds a point and the winner stays for the next round. A wrong
+guess ends the game.
+
+```
+Compare A: Cristiano Ronaldo, a Footballer, from Portugal.
+
+ _    __
+| |  / /____
+| | / / ___/
+| |/ (__  )
+|___/____(_)
+
+Against B: Ariana Grande, a Musician and actress, from United States.
+Who has more followers? Type 'A' or 'B':
+```
+
+- Python 3.13 or newer, no runtime dependencies.
+- The function names follow the assignment: `format_data`, `check_answer`.
+- Each account is shown once per game; if you get through all 50, you win.
+- Follower counts are in millions and come from the assignment's data set.
+
+## Requirements
+
+- [Python](https://www.python.org/downloads/) 3.13 or newer
+- Optional: [Doxygen](https://www.doxygen.nl/) to build the source documentation
+
+## Set up
+
+Create a local virtual environment in `.venv`, activate it, and upgrade `pip`.
+
+Windows (PowerShell):
+
+```powershell
+python -m venv .venv
+.venv\Scripts\Activate.ps1
+python -m pip install --upgrade pip
+```
+
+Windows (Git Bash), Linux and macOS:
+
+```bash
+python -m venv .venv
+source .venv/Scripts/activate   # Linux/macOS: source .venv/bin/activate
+python -m pip install --upgrade pip
+```
+
+The game itself needs nothing more. To run the tests and the code checks, install the
+development tools:
+
+```bash
+python -m pip install -e ".[dev]"
+```
+
+## Run the game
+
+```bash
+python -m higher_lower
+```
+
+Type `A` or `B` and press Enter. Press Ctrl+C to quit.
+
+## Run the tests
+
+```bash
+python -m pytest
+```
+
+Check the code style and types:
+
+```bash
+python -m ruff check src tests
+python -m ruff format --check src tests
+python -m mypy src tests
+```
+
+## Build the source documentation
+
+The source uses Doxygen comments. The HTML output goes to `docs/doxygen/html`.
+
+```bash
+doxygen Doxyfile
+```
+
+## Project layout
+
+| Path | Content |
+| --- | --- |
+| `src/higher_lower/` | The game: `game_logic.py` (pure functions), `game.py` (the loop), `game_data.py`, `art.py`, `constants.py` |
+| `tests/` | pytest tests |
+| `docs/` | Planning and review documents (business case, plan, milestones, use case) |
+| `pyproject.toml` | Project configuration |
+| `Doxyfile` | Doxygen configuration |
+
+## License
+
+GNU Affero General Public License v3.0. See [LICENSE](LICENSE).

docs/artifact-registry.md

@@ -15,7 +15,7 @@ document of a type. `Primary File` may contain a glob (e.g.
 | SA | Stakeholder Analysis | docs/stakeholder-analysis.md | 002 |
 | PP | Project Plan | docs/project-plan.md | 002 |
 | MIL | Milestone / Gateway | docs/milestones/*.md | 005 |
-| RC | SQA Review Record | docs/sqa/reviews/rc-*.md | 011 |
+| RC | SQA Review Record | docs/sqa/reviews/rc-*.md | 013 |
 | TM | Traceability Matrix | docs/sqa/traceability-matrix.md | 002 |
 | UCD | Use Case Diagram | docs/use-case-diagram.md | 002 |
 | US | User Story | docs/user-stories.md | 002 |

docs/milestones/mil-004-docs-release.md

@@ -4,12 +4,13 @@
 | Key | Value |
 | --- | --- |
 | ID | MIL-004 |
-| CrossReference | [BC-001], [PP-001] |
+| CrossReference | [BC-001], [PP-001], [RC-011] |
 
 ## Version History
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
-| 2026-10-04 | Proposed | Jens Tirsvad Nielsen | S01 | Initial version | [ddfe96f] |
+| 2026-10-04 | Deprecated | Jens Tirsvad Nielsen | S01 | Initial version | [ddfe96f] |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-011 | [267e34f] |
 
 ---
 
@@ -70,3 +71,5 @@ Decide whether the repository is ready to be shared with S02 and S03: documented
 [PP-001]: ../project-plan.md
 [MIL-003]: ./mil-003-console-game.md
 [ddfe96f]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/ddfe96ffa459d5e4b2e30d71bd53878aba2cfc5d
+[RC-011]: ../sqa/reviews/rc-011-mil-004.md
+[267e34f]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/267e34fc9f1fb9d76cc20032f3b09dc8e9dd82c7

docs/sqa/reviews/rc-007-ucd-001.md

@@ -9,7 +9,7 @@
 ## Version History
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
-| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | pending |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | [c7164fe] |
 
 ---
 
@@ -45,3 +45,4 @@ Go — all applicable criteria pass. Reviewer and author are both S01: the proje
 
 [UCD-001]: ../../use-case-diagram.md
 [QC-UCD-001]: ../../../framework/qc/qc-use-case-diagram.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0

docs/sqa/reviews/rc-008-us-001.md

@@ -9,7 +9,7 @@
 ## Version History
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
-| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | pending |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | [c7164fe] |
 
 ---
 
@@ -44,3 +44,4 @@ Go — all applicable criteria pass. Reviewer and author are both S01: the proje
 
 [US-001]: ../../user-stories.md
 [QC-US-001]: ../../../framework/qc/qc-user-story.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0

docs/sqa/reviews/rc-009-uc-001.md

@@ -9,7 +9,7 @@
 ## Version History
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
-| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | pending |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | [c7164fe] |
 
 ---
 
@@ -49,3 +49,4 @@ Go — all applicable criteria pass. Reviewer and author are both S01: the proje
 
 [UC-001]: ../../uc-001/uc.md
 [QC-UC-001]: ../../../framework/qc/qc-use-case.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0

docs/sqa/reviews/rc-010-ssd-001.md

@@ -9,7 +9,7 @@
 ## Version History
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
-| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | pending |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | [c7164fe] |
 
 ---
 
@@ -44,3 +44,4 @@ Go — all applicable criteria pass. Reviewer and author are both S01: the proje
 
 [SSD-001]: ../../uc-001/ssd.md
 [QC-SSD-001]: ../../../framework/qc/qc-ssd.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0

docs/sqa/reviews/rc-011-mil-004.md

@@ -0,0 +1,46 @@
+# SQA Review Record: MIL-004 Documentation and release
+
+## Metadata
+| Key | Value |
+| --- | --- |
+| ID | RC-011 |
+| CrossReference | [MIL-004], [QC-MIL-001] |
+
+## Version History
+| Date | Status | Author | Reviewer | Change | Commit |
+| --- | --- | --- | --- | --- | --- |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | [267e34f] |
+
+---
+
+## Artifact Under Review
+
+- Instance reviewed: [MIL-004]
+- Checklist used: [QC-MIL-001]
+
+## Checklist Results
+
+| # | Criterion | Status | Evidence/Notes |
+| --- | --- | --- | --- |
+| 1 | A concrete deliverable is defined for every gate | Pass | README, Doxygen build, review records and a verified clean copy. |
+| 2 | Explicit Go/No-Go criteria are stated for each gate | Pass | Six objectively checkable criteria. |
+| 3 | Dependencies on other milestones are explicitly mapped (Optional) | Pass | Depends on MIL-003, with the reason. |
+| 4 | Each milestone is traceable to a Business Case objective or KPI | Pass | O2, O4, O5. |
+| 5 | Milestone owner and approving reviewer are identified | Pass | S01 and S01. |
+| 6 | Milestone has a target date consistent with project constraints | Pass | 2026-10-14, the date in the BC-001 constraint. |
+
+## Overall Verdict
+
+Go — all criteria pass. Reviewer and author are both S01: the project has a single participant, so the framework's author/reviewer separation cannot be met. S01 accepted this deviation when requesting acceptance (2026-10-04).
+
+## Action Items
+
+| Action | Owner | Due |
+| --- | --- | --- |
+| None | — | — |
+
+---
+
+[MIL-004]: ../../milestones/mil-004-docs-release.md
+[QC-MIL-001]: ../../../framework/qc/qc-milestones-gateways.md
+[267e34f]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/267e34fc9f1fb9d76cc20032f3b09dc8e9dd82c7

docs/sqa/reviews/rc-012-source-code.md

@@ -0,0 +1,52 @@
+# SQA Review Record: Source code of higher_lower
+
+## Metadata
+| Key | Value |
+| --- | --- |
+| ID | RC-012 |
+| CrossReference | [QC-PY-001] |
+
+## Version History
+| Date | Status | Author | Reviewer | Change | Commit |
+| --- | --- | --- | --- | --- | --- |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Initial version | [267e34f] |
+
+---
+
+## Artifact Under Review
+
+- Instance reviewed: the Python source in `src/higher_lower/` and `tests/` at the commit of this review (source code has no artifact ID)
+- Checklist used: [QC-PY-001]
+
+## Checklist Results
+
+| # | Criterion | Status | Evidence/Notes |
+| --- | --- | --- | --- |
+| 1 | Packages, modules, functions, variables, classes and constants follow PEP 8 casing (`snake_case`, `PascalCase`, `UPPER_SNAKE`) | Pass | Modules and functions snake_case, constants UPPER_SNAKE, TypedDict PascalCase; ruff (E, F, I, UP, FLY, B) passes. |
+| 2 | Names state purpose in the domain's language; no unexplained abbreviations, no single-letter names outside tiny scopes | Pass | Names say purpose (check_answer, pick_pair); i/n-style names are not used. |
+| 3 | Code is produced by the project's formatter and passes its linter with no unexplained suppressions | Pass | `ruff check` and `ruff format --check` pass; the only suppression is E501 for the verbatim data file, with a comment in pyproject.toml. |
+| 4 | Every function and method signature is type-annotated, including `-> None` | Pass | All signatures annotated; `mypy --strict src tests` reports no issues. |
+| 5 | No bare `except:`, no swallowed exceptions; specific exceptions are raised and the cause is kept (`raise ... from`) | Pass | No bare except; `main` catches EOFError and KeyboardInterrupt on purpose and leaves with a goodbye. |
+| 6 | No mutable default arguments and no shadowed builtins | Pass | No mutable defaults; the data list default is a read-only module constant. |
+| 7 | Files, locks and connections are managed with context managers | N-A | The code opens no files, locks or connections. |
+| 8 | Public modules, classes and functions have docstrings that say what, not how (Optional) | Pass | Every module, class and function has a Doxygen docstring; checked with an AST script. |
+| 9 | Logging uses `logging`, not `print`; no secrets or personal data in log output | N-A | The game prints its interface to the console; there is no logging, and no secrets or personal data are printed. |
+| 10 | Classes and operations trace to the Design Class Diagram they implement; deviations are recorded | N-A | No Design Class Diagram exists or is planned; the only class is the Account TypedDict, and the functions implement the operations of SSD-001. |
+| 11 | Tests exist for new behaviour, are named for the behaviour, and do not depend on order or the network | Pass | 36 pytest tests named for behaviour, with scripted input and seeded randomness; no network, no order dependence. |
+| 12 | Type checker runs in strict mode without errors; `Any` is justified in a comment (Optional) | Pass | mypy strict runs without errors; no Any is used. |
+| 13 | Dependencies are declared and pinned in the project's dependency file, none unused (Optional) | Pass | No runtime dependencies; dev tools declared in pyproject.toml with version ranges. |
+
+## Overall Verdict
+
+Go — all applicable criteria pass. The review found a lint ordering error, format differences and strict-typing errors; they were fixed before this verdict (ruff import order and format, `Final` on the account key constants). Reviewer and author are both S01: the project has a single participant, so the framework's author/reviewer separation cannot be met. S01 accepted this deviation when requesting acceptance (2026-10-04).
+
+## Action Items
+
+| Action | Owner | Due |
+| --- | --- | --- |
+| None | — | — |
+
+---
+
+[QC-PY-001]: ../../../framework/qc/qc-programming-python.md
+[267e34f]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/267e34fc9f1fb9d76cc20032f3b09dc8e9dd82c7

docs/sqa/traceability-matrix.md

@@ -9,8 +9,8 @@
 ## Version History
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
-| 2026-10-04 | Proposed | Jens Tirsvad Nielsen | S01 | Added RC-006 and the UC-001 artifacts | [923dde7] |
+| 2026-10-04 | Proposed | Jens Tirsvad Nielsen | S01 | Added RC-007 to RC-010 for UCD-001, US-001, UC-001 and SSD-001 | [c7164fe] |
-| 2026-10-04 | Proposed | Jens Tirsvad Nielsen | S01 | Added RC-007 to RC-010 for UCD-001, US-001, UC-001 and SSD-001 | pending |
+| 2026-10-04 | Proposed | Jens Tirsvad Nielsen | S01 | Added RC-011 and RC-012 | [267e34f] |
 
 ---
 
@@ -28,8 +28,8 @@ target is measurable. A row is added or updated whenever an artifact instance is
 | [PP-001] | PP | [BC-001], [SA-001] | [MIL-001], [MIL-002], [MIL-003], [MIL-004] | [RC-003] |
 | [MIL-001] | MIL | [BC-001], [PP-001] | - | [RC-004] |
 | [MIL-002] | MIL | [BC-001], [PP-001], [MIL-001] | - | [RC-005] |
-| [MIL-003] | MIL | [BC-001], [PP-001], [MIL-002], [US-001] | [UC-001] | [RC-006] |
+| [MIL-003] | MIL | [BC-001], [PP-001], [MIL-002], [US-001] | [MIL-004], [UC-001] | [RC-006] |
-| [MIL-004] | MIL | [BC-001], [PP-001] | - | - |
+| [MIL-004] | MIL | [BC-001], [PP-001], [MIL-003] | - | [RC-011] |
 | [UCD-001] | UCD | [SA-001], [BC-001] | [US-001], [UC-001] | [RC-007] |
 | [US-001] | US | [UCD-001], [BC-001], [MIL-003] | [UC-001] | [RC-008] |
 | [UC-001] | UC | [UCD-001], [US-001], [SA-001] | [SSD-001] | [RC-009] |
@@ -38,6 +38,7 @@ target is measurable. A row is added or updated whenever an artifact instance is
 ## Coverage Notes
 
 - No domain model or design artifacts exist yet.
+- RC-012 reviews the Python source against QC-PY-001; source code has no artifact ID, so it has no row above.
 - `-` in Upstream means foundational; in Downstream, nothing is built on it yet; in Last Reviewed, no `RC-*` exists yet.
 
 ---
@@ -59,8 +60,11 @@ target is measurable. A row is added or updated whenever an artifact instance is
 [UC-001]: ../uc-001/uc.md
 [SSD-001]: ../uc-001/ssd.md
 [RC-006]: ./reviews/rc-006-mil-003.md
-[923dde7]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/923dde7dc9b59d2c77eddc88336451193147c557
 [RC-007]: ./reviews/rc-007-ucd-001.md
 [RC-008]: ./reviews/rc-008-us-001.md
 [RC-009]: ./reviews/rc-009-uc-001.md
 [RC-010]: ./reviews/rc-010-ssd-001.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0
+[RC-011]: ./reviews/rc-011-mil-004.md
+[RC-012]: ./reviews/rc-012-source-code.md
+[267e34f]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/267e34fc9f1fb9d76cc20032f3b09dc8e9dd82c7

docs/uc-001/ssd.md

@@ -10,7 +10,7 @@
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
 | 2026-10-04 | Deprecated | Jens Tirsvad Nielsen | S01 | Initial version | [923dde7] |
-| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-010 | pending |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-010 | [c7164fe] |
 
 ---
 
@@ -54,3 +54,4 @@ A game starts with `startGame` and ends when `makeGuess` returns wrong; the Syst
 [UC-001]: ./uc.md
 [923dde7]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/923dde7dc9b59d2c77eddc88336451193147c557
 [RC-010]: ../sqa/reviews/rc-010-ssd-001.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0

docs/uc-001/uc.md

@@ -10,7 +10,7 @@
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
 | 2026-10-04 | Deprecated | Jens Tirsvad Nielsen | S01 | Initial version | [923dde7] |
-| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-009 | pending |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-009 | [c7164fe] |
 
 ---
 
@@ -78,3 +78,4 @@ None.
 [SSD-001]: ./ssd.md
 [923dde7]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/923dde7dc9b59d2c77eddc88336451193147c557
 [RC-009]: ../sqa/reviews/rc-009-uc-001.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0

docs/use-case-diagram.md

@@ -10,7 +10,7 @@
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
 | 2026-10-04 | Deprecated | Jens Tirsvad Nielsen | S01 | Initial version | [923dde7] |
-| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-007 | pending |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-007 | [c7164fe] |
 
 ---
 
@@ -55,3 +55,4 @@ None: there is a single use case, so no `<<include>>` or `<<extend>>` is used.
 [UC-001]: ./uc-001/uc.md
 [923dde7]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/923dde7dc9b59d2c77eddc88336451193147c557
 [RC-007]: ./sqa/reviews/rc-007-ucd-001.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0

docs/user-stories.md

@@ -10,7 +10,7 @@
 | Date | Status | Author | Reviewer | Change | Commit |
 | --- | --- | --- | --- | --- | --- |
 | 2026-10-04 | Deprecated | Jens Tirsvad Nielsen | S01 | Initial version | [923dde7] |
-| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-008 | pending |
+| 2026-10-04 | Accepted | Jens Tirsvad Nielsen | S01 | Accepted after review RC-008 | [c7164fe] |
 
 ---
 
@@ -51,3 +51,4 @@ Both stories are Independent of each other in wording, Negotiable in detail, Val
 [MIL-003]: ./milestones/mil-003-console-game.md
 [923dde7]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/923dde7dc9b59d2c77eddc88336451193147c557
 [RC-008]: ./sqa/reviews/rc-008-us-001.md
+[c7164fe]: https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/014-higher_lower/commit/c7164feab1333951bf6f557baf95a26764656be0

pyproject.toml

@@ -12,7 +12,7 @@ license = { file = "LICENSE" }
 dependencies = []
 
 [project.optional-dependencies]
-dev = ["pytest>=8"]
+dev = ["pytest>=9,<10", "ruff>=0.16,<0.17", "mypy>=2.4,<3"]
 
 [tool.setuptools.packages.find]
 where = ["src"]
@@ -20,3 +20,16 @@ where = ["src"]
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 pythonpath = ["src"]
+
+[tool.ruff]
+line-length = 88
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "UP", "FLY", "B"]
+
+[tool.ruff.lint.per-file-ignores]
+"src/higher_lower/game_data.py" = ["E501"] # assignment data kept verbatim
+
+[tool.mypy]
+strict = true
+mypy_path = "src"

src/higher_lower/art.py

@@ -9,23 +9,37 @@ string, so Doxygen does not read the backticks in the art as markup.
 ## The game logo.
 logo = (
     "\n"
-    r"    __  ___       __             " "\n"
+    r"    __  ___       __             "
-    r"   / / / (_)___ _/ /_  ___  _____" "\n"
+    "\n"
-    r"  / /_/ / / __ `/ __ \/ _ \/ ___/" "\n"
+    r"   / / / (_)___ _/ /_  ___  _____"
-    r" / __  / / /_/ / / / /  __/ /    " "\n"
+    "\n"
-    r"/_/ ///_/\__, /_/ /_/\___/_/     " "\n"
+    r"  / /_/ / / __ `/ __ \/ _ \/ ___/"
-    r"   / /  /____/_      _____  _____" "\n"
+    "\n"
-    r"  / /   / __ \ | /| / / _ \/ ___/" "\n"
+    r" / __  / / /_/ / / / /  __/ /    "
-    r" / /___/ /_/ / |/ |/ /  __/ /    " "\n"
+    "\n"
-    r"/_____/\____/|__/|__/\___/_/     " "\n"
+    r"/_/ ///_/\__, /_/ /_/\___/_/     "
+    "\n"
+    r"   / /  /____/_      _____  _____"
+    "\n"
+    r"  / /   / __ \ | /| / / _ \/ ___/"
+    "\n"
+    r" / /___/ /_/ / |/ |/ /  __/ /    "
+    "\n"
+    r"/_____/\____/|__/|__/\___/_/     "
+    "\n"
 )
 
 ## The "vs" shown between the two accounts.
 vs = (
     "\n"
-    r" _    __    " "\n"
+    r" _    __    "
-    r"| |  / /____" "\n"
+    "\n"
-    r"| | / / ___/" "\n"
+    r"| |  / /____"
-    r"| |/ (__  ) " "\n"
+    "\n"
-    r"|___/____(_)" "\n"
+    r"| | / / ___/"
+    "\n"
+    r"| |/ (__  ) "
+    "\n"
+    r"|___/____(_)"
+    "\n"
 )

src/higher_lower/constants.py

@@ -2,11 +2,13 @@
 @brief Constants shared by the game modules.
 """
 
+from typing import Final
+
 ## Keys of an account dictionary.
-KEY_NAME = "name"
+KEY_NAME: Final = "name"
-KEY_FOLLOWER_COUNT = "follower_count"
+KEY_FOLLOWER_COUNT: Final = "follower_count"
-KEY_DESCRIPTION = "description"
+KEY_DESCRIPTION: Final = "description"
-KEY_COUNTRY = "country"
+KEY_COUNTRY: Final = "country"
 
 ## The two choices the player can type, in lower case.
 CHOICE_A = "a"

src/higher_lower/game_logic.py

@@ -1,5 +1,5 @@
 """@file game_logic.py
-@brief Pure functions of the game: drawing accounts, describing them and checking guesses.
+@brief Pure game functions: draw accounts, describe them, check guesses.
 """
 
 import random
@@ -9,9 +9,9 @@ from higher_lower.constants import (
     ACCOUNT_TEMPLATE,
     CHOICE_A,
     CHOICE_B,
+    KEY_COUNTRY,
     KEY_DESCRIPTION,
     KEY_NAME,
-    KEY_COUNTRY,
 )
 from higher_lower.game_data import Account, data
 

tests/test_game.py

@@ -14,20 +14,37 @@ from higher_lower.game import ask_choice, play_game, show_round
 from higher_lower.game_data import Account
 
 ACCOUNTS: list[Account] = [
-    {"name": "First", "follower_count": 30, "description": "Test one", "country": "Denmark"},
+    {
-    {"name": "Second", "follower_count": 20, "description": "Test two", "country": "Norway"},
+        "name": "First",
-    {"name": "Third", "follower_count": 10, "description": "Test three", "country": "Sweden"},
+        "follower_count": 30,
+        "description": "Test one",
+        "country": "Denmark",
+    },
+    {
+        "name": "Second",
+        "follower_count": 20,
+        "description": "Test two",
+        "country": "Norway",
+    },
+    {
+        "name": "Third",
+        "follower_count": 10,
+        "description": "Test three",
+        "country": "Sweden",
+    },
 ]
 
 
 class FirstRng(random.Random):
-    """@brief Random generator that always takes the first entries, so a game is fixed."""
+    """@brief Random generator that takes the first entries, so a game is fixed."""
 
-    def sample(self, population: Sequence, k: int, **kwargs: object) -> list:  # type: ignore[override]
+    def sample(  # type: ignore[override]
+        self, population: Sequence[Account], k: int, **kwargs: object
+    ) -> list[Account]:
         """@brief Return the first k entries."""
         return list(population)[:k]
 
-    def choice(self, seq: Sequence) -> Account:  # type: ignore[override]
+    def choice(self, seq: Sequence[Account]) -> Account:  # type: ignore[override]
         """@brief Return the first entry."""
         return seq[0]
 

tests/test_game_logic.py

@@ -58,8 +58,7 @@ def test_format_data_describes_the_account() -> None:
         "country": "United States",
     }
     assert (
-        format_data(account)
+        format_data(account) == "Nike, a Sportswear multinational, from United States"
-        == "Nike, a Sportswear multinational, from United States"
     )