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# Squirrel Census
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# Squirrel Census
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Day 25 of Udemy's *100 Days of Code: The Complete Python Pro Bootcamp*: count the
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Day 25 of Udemy's *100 Days of Code: The Complete Python Pro Bootcamp*: count the
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squirrels of the 2018 Central Park Squirrel Census by primary fur colour (gray,
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squirrels of the 2018 Central Park Squirrel Census by primary fur colour (gray,
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cinnamon, black) and export the counts to `squirrel_count.csv`. Python 3.13 or
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cinnamon, black) and export the counts to `squirrel_count.csv`. Python 3.13 or
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later, no runtime dependencies, with tests and source documentation.
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later, no runtime dependencies, with tests and source documentation.
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![Program run][img-run]
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![Program run][img-run]
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## Requirements
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## Requirements
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- Python 3.13 or later (`python --version` on Windows, `python3 --version` on Linux and macOS).
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- Python 3.13 or later (`python --version` on Windows, `python3 --version` on Linux and macOS).
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- `venv`, which ships with Python (on Debian: the `python3-venv` package).
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- `venv`, which ships with Python (on Debian: the `python3-venv` package).
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- The 2018 census file. It is already in the repository under `data/`.
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- The 2018 census file. It is already in the repository under `data/`.
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- Optional: [Doxygen][doxygen] 1.9 or later, only to build the source documentation.
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- Optional: [Doxygen][doxygen] 1.9 or later, only to build the source documentation.
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There are no runtime dependencies: the program uses only the Python standard library
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There are no runtime dependencies: the program uses only the Python standard library
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([ADR-0001][adr-0001]). `pytest` is needed only to run the tests.
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([ADR-0001][adr-0001]). `pytest` is needed only to run the tests.
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## Set up
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## Set up
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Create a local virtual environment named `.venv` in the project folder, upgrade `pip`
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Create a local virtual environment named `.venv` in the project folder, upgrade `pip`
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and install the project with its development tools (pytest, ruff, mypy).
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and install the project with its development tools (pytest, ruff, mypy).
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### Windows powershell
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### Windows powershell
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```powershell
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```powershell
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python -m venv .venv
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python -m venv .venv
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.\.venv\Scripts\Activate.ps1
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.\.venv\Scripts\Activate.ps1
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python -m pip install --upgrade pip
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python -m pip install --upgrade pip
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python -m pip install -e ".[dev]"
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python -m pip install -e ".[dev]"
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```
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```
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If PowerShell refuses to run the activation script, allow it for the current session:
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If PowerShell refuses to run the activation script, allow it for the current session:
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`Set-ExecutionPolicy -Scope Process -ExecutionPolicy RemoteSigned`.
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`Set-ExecutionPolicy -Scope Process -ExecutionPolicy RemoteSigned`.
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### Linux debian
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### Linux debian
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```bash
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```bash
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sudo apt install python3 python3-venv
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sudo apt install python3 python3-venv
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python3 -m venv .venv
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python3 -m venv .venv
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source .venv/bin/activate
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source .venv/bin/activate
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python -m pip install --upgrade pip
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python -m pip install --upgrade pip
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python -m pip install -e ".[dev]"
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python -m pip install -e ".[dev]"
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```
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```
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### MacOS
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### MacOS
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```bash
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```bash
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python3 -m venv .venv
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python3 -m venv .venv
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source .venv/bin/activate
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source .venv/bin/activate
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python -m pip install --upgrade pip
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python -m pip install --upgrade pip
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python -m pip install -e ".[dev]"
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python -m pip install -e ".[dev]"
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```
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```
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On macOS, Python 3.13 can be installed with `brew install python@3.13`.
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On macOS, Python 3.13 can be installed with `brew install python@3.13`.
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## Run
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## Run
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With the virtual environment active, run from the project folder:
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With the virtual environment active, run from the project folder:
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```bash
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```bash
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python -m squirrel
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python -m squirrel
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```
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```
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The program reads `data/2018_Central_Park_Squirrel_Census_-_Squirrel_Data.csv`, prints
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The program reads `data/2018_Central_Park_Squirrel_Census_-_Squirrel_Data.csv`, prints
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the colour counts and writes `squirrel_count.csv`:
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the colour counts and writes `squirrel_count.csv`:
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```text
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```text
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Gray: 2473
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Gray: 2473
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Cinnamon: 392
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Cinnamon: 392
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Black: 103
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Black: 103
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```
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```
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Use other files by passing them as arguments, `python -m squirrel <census file> <summary file>`.
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Use other files by passing them as arguments, `python -m squirrel <census file> <summary file>`.
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If the census file does not exist the program prints a message and exits with status 2.
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If the census file does not exist the program prints a message and exits with status 2.
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## Run the tests
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## Run the tests
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```bash
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```bash
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python -m pytest
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python -m pytest
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```
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```
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![Test run][img-tests]
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![Test run][img-tests]
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The tests use small fixture rows; one test also checks the real 2018 census file when
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The tests use small fixture rows; one test also checks the real 2018 census file when
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it is present.
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it is present.
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## Continuous integration
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## Continuous integration
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The workflow [`.gitea/workflows/ci.yml`][ci] runs for every push to `main` and for every
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The workflow [`.gitea/workflows/ci.yml`][ci] runs for every push to `main` and for every
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pull request. It sets up Python 3.13, creates a `.venv`, upgrades `pip`, installs the
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pull request. It sets up Python 3.13, creates a `.venv`, upgrades `pip`, installs the
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project with `.[dev]` and runs `python -m pytest`. It uses `github.*` contexts only, so
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project with `.[dev]` and runs `python -m pytest`. It uses `github.*` contexts only, so
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it also runs on GitHub Actions.
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it also runs on GitHub Actions.
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## Build the source documentation
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## Build the source documentation
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The source is documented with Doxygen comments and configured by [`Doxyfile`][doxyfile].
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The source is documented with Doxygen comments and configured by [`Doxyfile`][doxyfile].
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```bash
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```bash
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doxygen Doxyfile
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doxygen Doxyfile
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```
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```
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Open `docs/doxygen/html/index.html` in a browser. The output folder is ignored by git.
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Open `docs/doxygen/html/index.html` in a browser. The output folder is ignored by git.
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## Project layout
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## Project layout
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```text
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```text
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.gitea/workflows/ci.yml continuous integration workflow
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.gitea/workflows/ci.yml continuous integration workflow
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data/ the 2018 census file
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data/ the 2018 census file
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docs/ business case, plan, milestones, models, reviews, ADRs
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docs/ business case, plan, milestones, models, reviews, ADRs
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docs/images/ screenshots used by this README and the wiki
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docs/images/ screenshots used by this README and the wiki
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src/squirrel/ the package: census.py, cli.py, constants.py
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src/squirrel/ the package: census.py, cli.py, constants.py
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tests/ pytest tests
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tests/ pytest tests
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Doxyfile Doxygen configuration
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wiki/ wiki pages in English, Danish (.da) and Bahasa Malaysia (.ms)
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pyproject.toml project configuration (Python >=3.13, no runtime dependencies)
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Doxyfile Doxygen configuration
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squirrel_count.csv the result of the assignment
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pyproject.toml project configuration (Python >=3.13, no runtime dependencies)
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```
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squirrel_count.csv the result of the assignment
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```
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The project documents, in reading order: [Business Case][bc], [Stakeholder
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Analysis][sa], [Project Plan][pp], [Use Case][uc], [Domain Model][dm], [ADR-0001][adr-0001].
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The project documents, in reading order: [Business Case][bc], [Stakeholder
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The repository also has a wiki in English, Danish and Bahasa Malaysia.
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Analysis][sa], [Project Plan][pp], [Use Case][uc], [Domain Model][dm], [ADR-0001][adr-0001].
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The repository also has a wiki in English, Danish and Bahasa Malaysia.
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## License
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## License
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GNU Affero General Public License v3.0 or later. See [LICENSE][license].
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GNU Affero General Public License v3.0 or later. See [LICENSE][license].
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---
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---
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[img-run]: docs/images/run.png
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[img-tests]: docs/images/tests.png
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[img-run]: docs/images/run.png
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[doxygen]: https://www.doxygen.nl/
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[img-tests]: docs/images/tests.png
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[adr-0001]: docs/adr/adr-0001-standard-library-instead-of-pandas.md
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[doxygen]: https://www.doxygen.nl/
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[ci]: .gitea/workflows/ci.yml
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[adr-0001]: docs/adr/adr-0001-standard-library-instead-of-pandas.md
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[doxyfile]: Doxyfile
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[ci]: .gitea/workflows/ci.yml
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[bc]: docs/business-case.md
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[doxyfile]: Doxyfile
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[sa]: docs/stakeholder-analysis.md
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[bc]: docs/business-case.md
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[pp]: docs/project-plan.md
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[sa]: docs/stakeholder-analysis.md
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[uc]: docs/uc-001/uc.md
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[pp]: docs/project-plan.md
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[dm]: docs/domain-model.md
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[uc]: docs/uc-001/uc.md
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[license]: LICENSE
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[dm]: docs/domain-model.md
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[license]: LICENSE
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