Everything that I've heard that was changed from Python 2 to 3 are reminiscent of things that Perl5 handled while maintaining backwards compatibility. I mean P

Everything that I've heard that was changed from Python 2 to 3 are reminiscent of things that Perl5 handled while maintaining backwards compatibility. I mean Perl5 is still mostly backwards compatible back to the original version released in 1987. (There were a few rarely used bad features that should have never been there which have been removed.) The way it does this is by having you specifically ask for the new features, if they would otherwise break code.