For businesses based in the EU, it's important for VAT purposes to know whether your customers are also based in the EU. As usual, a quick Google search did not reveal a usable list of EU countries by ISO 3166 Alpha-2 code, so I whipped up my own.

european_union_countries = ('AT', 'BE', 'BG', 'CY', 'CZ', 'DK', 'EE', 'FI', 'FR', 'DE', 'GR', 'HU', 'IE', 'IT', 'LV', 'LT', 'LU', 'MT', 'NL', 'PL', 'PT', 'RO', 'SK', 'SI', 'ES', 'SE', 'GB',)

Take a look at Open Country Codes if you want a constantly up-to-date list of all ISO 3166 Alpha-2 codes and country names as data structures and components for various languages.

Enjoy!

The ISO 3166 Alpha-2 codes for EU countries article by Aral Balkan, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-Noncommercial 2.0 UK: England License.