xinrong-meng commented on code in PR #37219:
URL: https://github.com/apache/spark/pull/37219#discussion_r923851884
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python/pyspark/sql/types.py:
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@@ -136,14 +136,15 @@ def fromInternal(self, obj: Any) -> Any:
class DataTypeSingleton(type):
"""Metaclass for DataType"""
- _instances: ClassVar[Dict[Type["DataTypeSingleton"], "DataTypeSingleton"]]
= {}
+ _instances: ClassVar[Dict[Tuple, "DataTypeSingleton"]] = {}
- def __call__(cls: Type[T]) -> T: # type: ignore[override]
- if cls not in cls._instances: # type: ignore[attr-defined]
- cls._instances[cls] = super( # type: ignore[misc, attr-defined]
+ def __call__(cls: Type[T], *args: Any, **kwargs: Any) -> T: # type:
ignore[override]
+ key = (cls, args, str(kwargs))
Review Comment:
Strict matching of arguments is expected to reuse the same instance.
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