use python3 in hack

[AxeZhan]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Currently some files in k/k are still using python2, we should upgrade them to python3.

Which issue(s) this PR fixes:

Fixes #114967

Special notes for your reviewer:

I ran this command to find py files in k/k repo:

find ./ -name "*.py"                  
.//staging/src/k8s.io/kubectl/pkg/util/i18n/translations/extract.py
.//hack/boilerplate/test/pass.py
.//hack/boilerplate/test/fail.py
.//hack/boilerplate/boilerplate.py
.//hack/boilerplate/boilerplate_test.py
.//hack/verify-flags-underscore.py
.//hack/verify-publishing-bot.py

I ran this script to update and check these py files:

#!/usr/bin/env python
import sys
from lib2to3.main import main

sys.exit(main("lib2to3.fixes"))

please leave a comment if there's a more appropriate method :)

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

@kidddddddddddddddddddddd: This issue is currently awaiting triage.

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[k8s-ci-robot]

Hi @kidddddddddddddddddddddd. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[aojea]

/ok-to-test
/assign @BenTheElder

[BenTheElder]

None of these required any source changes?

[AxeZhan]

None of these required any source changes?

Yesterday I just ran these files with python3 locally, and everything was fine.
Today I ran a script to check these files, and it shows some changes.

#!/usr/bin/env python
import sys
from lib2to3.main import main

sys.exit(main("lib2to3.fixes"))

I'd be glad to receive some suggestions about how to check this more properly :)

[BenTheElder]

/ok-to-test

[thockin]

Thanks! I stumbled on this in my own work. Anything holding up approval?

[AxeZhan]

Thanks! I stumbled on this in my own work. Anything holding up approval?

Actually I don't know. Maybe you can read the statement and give me some advice.

[thockin]

I'm not at all a python expert, I just know that I don't have python2 installed :)

This looks OK to me, but I can't say I know what all the diffs are about.

[dims]

This is a good start, let's get this in and see if we find any other problems.

(Yes, i've dabbled with this python2->3 migration before, the automated thing finds a lot of it for sure, but it may not catch 100% of things)

/approve
/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: c5658ca785b9b4bc3693baf2fcba42b201348d75

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dims, kidddddddddddddddddddddd

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• hack/OWNERS [dims]
• staging/src/k8s.io/kubectl/pkg/util/i18n/translations/OWNERS [dims]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[BenTheElder]

Thank you!