base_plugin: enforce kwarg-only initializers #3312
Merged
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Summary:
These initializers have always been documented as requiring keyword
arguments, so this is not a breaking change. We can now use Python 3’s
keyword-only argument syntax to actually enforce this.
The trailing comma removal is necessary to work around a parser bug in
cPython 3.5: https://bugs.python.org/issue9232
Test Plan:
All tests pass, and no Google-internal Python 2 binaries depend on this
target.
wchargin-branch: base-plugin-kwargs