After that I will post a comments to all PR concerning the change.

Action Required! We recently switch the formatter from yapf to ruff which should modernize the codebase. Your PR is affected. To prevent issues with merging your code, here's what you'll need to do:

1. Install ruff

pip install ruff==0.1.5

2. Format changed files with ruff

# Move to top-level directory.
cd $(git rev-parse --show-toplevel)
# Format changed files.
MERGEBASE="$(git merge-base upstream/master HEAD)"
if ! git diff --diff-filter=ACRM --quiet --exit-code "$MERGEBASE" -- '*.py' &>/dev/null; then
    git diff --name-only --diff-filter=ACRM "$MERGEBASE" -- '*.py' | xargs -P 5 \
        ruff format --respect-gitignore .
fi

3. Commit your changes.

git add --all
git commit -m "Format Python code with ruff"

4. Merge master into your branch.

git pull upstream main

Resolve merge conflicts (if necessary).

After running these steps, you'll have the updated format.sh.

Thank you!

Too late to do it :( This codebase is too big and too many in progress PRs.