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I think in hindsight v3 mode could be enabled per file, rather than per program. That wasn't done, but for reasons that amount to "we don't want to"... I simp

I think in hindsight v3 mode could be enabled per file, rather than per program. That wasn't done, but for reasons that amount to "we don't want to"... I simply believe the python authors made the wrong choice.

joshuamorton 7y ago
> That wasn't done, but for reasons that amount to "we don't want to"... Well, and giant glaring differences in internals. Python3 and python2 have incompatible bytecodes. Swapping compilers on a per-file basis in a language as dynamic as python isn't possible. Python allows dynamic re-writing of modules and source code. How do you decide which version a module is run with if the module is modified at runtime?