I even heard a joke: Python 2 = North Korea Python 3 = South Korea Except Swift 2 to Swift 3 has a good start, breaking as much source compatibility as they co

I even heard a joke: Python 2 = North Korea Python 3 = South Korea Except Swift 2 to Swift 3 has a good start, breaking as much source compatibility as they could is a great choice when the language is still young. PHP 5.6 adopted UTF8 by default for security and Python 2 is mature and solve many problems in the past, I would say most programmers are lazy writing test suite as well. You should start with Python 3 or Swift 3, both are a fine language for the modern world.