[SPARK-55821][PYTHON] Enforce keyword-only arguments in serializer __init__ methods#54605
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What changes were proposed in this pull request?
Add
*separator to enforce keyword-only arguments in all serializer__init__methods inpyspark.sql.pandas.serializers, and convert all call sites inworker.pyfrom positional to keyword arguments.Why are the changes needed?
As noted by @zhengruifeng in #54568 (comment), serializer constructors accept too many positional arguments, making call sites error-prone and hard to read. Enforcing keyword-only arguments prevents positional mistakes and improves readability.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Existing tests.
Was this patch authored or co-authored using generative AI tooling?
No.