> How close can you come to a Python code base that runs in v2 and v3? Using the `six` module, this is (nearly) trivial for 99% of code. If you're doing certai

> How close can you come to a Python code base that runs in v2 and v3? Using the `six` module, this is (nearly) trivial for 99% of code. If you're doing certain weird things, its more difficult but possible. (I say this having done py2-3 conversion or dual support for lots of vanilla code, as well as a significant amount of weird code: c/c++ extensions and code that uses advanced features like code object introspection and dynamic imports/rewriting/etc).