I'm looking to learn Python, so it's a pitty that there's a schism of sorts within Python.

This sort of reminds me about PHP 6: a project with initially high momentum and various ideas to clean up the language. But over time it became clear that upgrading from the land of magic quote and register globals (PHP 4) to PHP 6 would have been too much of a jump.

So instead they slowly started deprecating and making improvements within the PHP 5 stream, and bit-by-bit PHP has moved on.

The change from Python 2 to 3 doesn't look dramatic, but I can understand why there's an air of lethargy regarding the upgrade.