Tirsvad
9d8beb3aef
- Replace separate encrypt/decrypt with shared caesar() function - Add direction constants (DIRECTION_ENCODE, DIRECTION_DECODE) and prompts - Update main.py to support interactive encode/decode loop - Keep encrypt/decrypt as wrappers for backward compatibility - Add tests for caesar() with both directions and error handling - Update tests for main.py with interactive scenario tests
77 lines
1.8 KiB
Markdown
77 lines
1.8 KiB
Markdown
# 🔐 Caesar Cipher
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A beginner-friendly Python program that encodes and decodes messages with the Caesar cipher.
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## 📚 Table of Contents
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- [Overview](#-overview)
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- [Requirements](#-requirements)
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- [Setup](#-setup)
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- [Run](#-run)
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- [Tests](#-tests)
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- [License](#-license)
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- [Links](#-links)
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## 🧭 Overview
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The Caesar cipher shifts every letter by a fixed number of places (with a shift of 3, `E` becomes `H`). This project, from Udemy's *100 Days of Code: The Complete Python Pro Bootcamp* (Day 8), finds letter positions with `list.index` and wraps around the alphabet with the modulo operator. The interactive program lets you encode or decode as many messages as you like. Code lives in `src/`, tests in `tests/`, docs in `docs/`.
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## 📋 Requirements
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- Python 3.13 or newer
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- `pytest` (development only; no runtime dependencies)
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- Optional: [Doxygen](https://www.doxygen.nl/) to build the API docs
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## 🛠️ Setup
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Create and activate a local virtual environment, then upgrade pip and install the project:
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```bash
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python -m venv .venv
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```
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Activate it:
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```bash
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# Linux / macOS
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source .venv/bin/activate
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# Git Bash on Windows
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source .venv/Scripts/activate
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```
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```powershell
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# Windows PowerShell
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.venv\Scripts\Activate.ps1
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```
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```bash
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python -m pip install --upgrade pip
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python -m pip install -e ".[dev]"
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```
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## ▶️ Run
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```bash
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python -m caesar_cipher
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```
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or, after installation, `caesar-cipher`.
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## 🧪 Tests
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```bash
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python -m pytest
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```
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Build the API docs with `doxygen Doxyfile` (output in `docs/doxygen/html`).
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## 📄 License
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GNU AGPL-3.0 – see [LICENSE](LICENSE).
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## 🔗 Links
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- [Repository](https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code)
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- [Documentation](docs/index.md)
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- [Issue tracker](https://git.tirsystem.com/Tirsvad-Udemy-100_days_of_code/008-caesar_cipher/issues)
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