A simple Python CLI application that converts an amount from one currency to another using live exchange rates fetched from an open API.

1. api_handler.py

   • Handles fetching exchange rate data from the online API.

2. currencies.py

   • Provides utility functions to list supported currencies and validate currency codes.

3. converter.py

   • Contains the core logic to convert between currencies using the exchange rates.

4. main.py

   • CLI interface where users input the currencies and amount to convert.

5. test_*.py

   • Unit tests for each module to ensure functionality.

• Python 3.7+
• requests library

Run the following command to install dependencies:

• pip install -r requirements.txt

Run the main script from the terminal:

Follow the prompts to enter:

• Source currency code (e.g., USD)
• Target currency code (e.g., AUD)
• Amount to convert

The app will display the converted amount and allow you to repeat or exit.

To run tests:

• python -m unittest discover

The conversion is based on live exchange rates retrieved from: https://open.er-api.com/v6/latest

Make sure you are connected to the internet when running the app.