- Update default python3 to 3.7

[antoine]

Summary

It's right about time to switch to 3.7.

• There already were 2 patch releases, so the branch is well tested
• It's the current stable version, recommented to download on python.org
• It has new features already needed for some module updates, including dataclasses, asyncio improvements and typing

Test Plan

The usual exp-run

[antoine]

it's definitely not ready, switch from python2.7 to python3.6 will happen in the next weeks, but i don't expect python 3.7 as default before a few months

[antoine]

There is no need to create a review for this, there is already an exp-run with results posted in bugzilla.

[AMDmi3]

In D19671#421210, @antoine wrote:

it's definitely not ready, switch from python2.7 to python3.6 will happen in the next weeks, but i don't expect python 3.7 as default before a few months

Please be more specific on why it's "not ready". For the record, I've been using 3.7 since 3.7.0.

There is no need to create a review for this, there is already an exp-run with results posted in bugzilla.

Please provide a link.

[AMDmi3]

In D19671#421213, @antoine wrote:

There is no need to create a review for this, there is already an exp-run with results posted in bugzilla.

I don't see any exp-run related to python37 as default. Could you please elaborate?

https://bugs.freebsd.org/bugzilla/buglist.cgi?bug_status=New&bug_status=Open&bug_status=In Progress&bug_status=Closed&bug_status=UNCONFIRMED&f0=OP&f1=OP&f2=product&f3=component&f4=alias&f5=short_desc&f7=CP&f8=CP&j1=OR&list_id=289793&o2=substring&o3=substring&o4=substring&o5=substring&query_format=advanced&short_desc=exp-run python&short_desc_type=allwordssubstr&v2=exp-run&v3=exp-run&v4=exp-run&v5=exp-run

Since there's none, we need to open one, perform the necessary work to fix the fallout and switch to 3.7 by default.

[antoine]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233770

[AMDmi3]

Thanks!