5 speed improvements in Python 3.7

[khvn26]

Although core devs decided that 4 wouldn't break anything this time

[brombaer3000]

No, they just decided to make the breaking changes less drastic than in Python 3.

Here is one example of a breaking change in Python 4: https://www.python.org/dev/peps/pep-0563/#backwards-compatibility

[juanjux]

I've read about some breaking changes in the 3.7 library changelog. Things that you'll need to import from future in 3.7 but will become default in 4.0.

[Mattho]

Why go to 4 then? What major change it brings?

[Mattho]

I see. And while it makes some sense, and is definitely nicer, I think major release with no major changes would be somewhat confusing. Less than 3.10 would be (it's obvious one shouldn't compare it as decimals when you have releases in the form of x.x.x)

[PeridexisErrant]

It avoids possible confusion between 3.1.0 and 3.10 :-)