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[GitHub] [spark] zero323 opened a new pull request #35399: [WIP][SPARK-37416] Inline type hints for pyspark.ml.wrapper

zero323 opened a new pull request #35399:
URL: https://github.com/apache/spark/pull/35399


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   This PR migrates type `pyspark.ml.wrapper` annotations from stub file to inline type hints.
   
   ### Why are the changes needed?
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   Part of ongoing migration of type hints.
   
   ### Does this PR introduce _any_ user-facing change?
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   No.
   
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   Existing tests.


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[GitHub] [spark] zero323 commented on pull request #35399: [SPARK-37416][PYTHON][ML] Inline type hints for pyspark.ml.wrapper

Posted by GitBox <gi...@apache.org>.
zero323 commented on pull request #35399:
URL: https://github.com/apache/spark/pull/35399#issuecomment-1030933947


   Merged into master.
   
   Thanks @HyukjinKwon!


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[GitHub] [spark] zero323 closed pull request #35399: [SPARK-37416][PYTHON][ML] Inline type hints for pyspark.ml.wrapper

Posted by GitBox <gi...@apache.org>.
zero323 closed pull request #35399:
URL: https://github.com/apache/spark/pull/35399


   


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[GitHub] [spark] zero323 commented on a change in pull request #35399: [WIP][SPARK-37416][PYTHON][ML] Inline type hints for pyspark.ml.wrapper

Posted by GitBox <gi...@apache.org>.
zero323 commented on a change in pull request #35399:
URL: https://github.com/apache/spark/pull/35399#discussion_r799927110



##########
File path: python/pyspark/ml/classification.pyi
##########
@@ -231,6 +233,7 @@ class LinearSVC(
     def setWeightCol(self, value: str) -> LinearSVC: ...
     def setAggregationDepth(self, value: int) -> LinearSVC: ...
     def setMaxBlockSizeInMB(self, value: float) -> LinearSVC: ...
+    def _create_model(self, java_model: JavaObject) -> LinearSVCModel: ...

Review comment:
       All of these are added to avoid errors caused by exposing abstract methods in wrapper.




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[GitHub] [spark] zero323 commented on a change in pull request #35399: [WIP][SPARK-37416][PYTHON][ML] Inline type hints for pyspark.ml.wrapper

Posted by GitBox <gi...@apache.org>.
zero323 commented on a change in pull request #35399:
URL: https://github.com/apache/spark/pull/35399#discussion_r799927023



##########
File path: python/pyspark/ml/wrapper.py
##########
@@ -17,57 +17,76 @@
 
 from abc import ABCMeta, abstractmethod
 
+from typing import Any, Generic, Optional, List, Type, TypeVar, TYPE_CHECKING
+
 from pyspark import since
 from pyspark import SparkContext
 from pyspark.sql import DataFrame
 from pyspark.ml import Estimator, Predictor, PredictionModel, Transformer, Model
 from pyspark.ml.base import _PredictorParams
-from pyspark.ml.param import Params
-from pyspark.ml.util import _jvm
+from pyspark.ml.param import Param, Params
+from pyspark.ml.util import _jvm  # type: ignore[attr-defined]
 from pyspark.ml.common import inherit_doc, _java2py, _py2java
 
 
+if TYPE_CHECKING:
+    from pyspark.ml._typing import ParamMap
+    from py4j.java_gateway import JavaObject, JavaClass
+
+
+T = TypeVar("T")
+JW = TypeVar("JW", bound="JavaWrapper")
+JM = TypeVar("JM", bound="JavaTransformer")
+JP = TypeVar("JP", bound="JavaParams")
+
+
 class JavaWrapper:
     """
     Wrapper class for a Java companion object
     """
 
-    def __init__(self, java_obj=None):
+    def __init__(self, java_obj: Optional["JavaObject"] = None):
         super(JavaWrapper, self).__init__()
         self._java_obj = java_obj
 
-    def __del__(self):
+    def __del__(self) -> None:
         if SparkContext._active_spark_context and self._java_obj is not None:
-            SparkContext._active_spark_context._gateway.detach(self._java_obj)
+            SparkContext._active_spark_context._gateway.detach(  # type: ignore[union-attr]

Review comment:
       Making exception from `assert not None` here, to improve readability.




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[GitHub] [spark] zero323 commented on a change in pull request #35399: [WIP][SPARK-37416][PYTHON][ML] Inline type hints for pyspark.ml.wrapper

Posted by GitBox <gi...@apache.org>.
zero323 commented on a change in pull request #35399:
URL: https://github.com/apache/spark/pull/35399#discussion_r799927332



##########
File path: python/pyspark/ml/wrapper.py
##########
@@ -17,57 +17,76 @@
 
 from abc import ABCMeta, abstractmethod
 
+from typing import Any, Generic, Optional, List, Type, TypeVar, TYPE_CHECKING
+
 from pyspark import since
 from pyspark import SparkContext
 from pyspark.sql import DataFrame
 from pyspark.ml import Estimator, Predictor, PredictionModel, Transformer, Model
 from pyspark.ml.base import _PredictorParams
-from pyspark.ml.param import Params
-from pyspark.ml.util import _jvm
+from pyspark.ml.param import Param, Params
+from pyspark.ml.util import _jvm  # type: ignore[attr-defined]
 from pyspark.ml.common import inherit_doc, _java2py, _py2java
 
 
+if TYPE_CHECKING:
+    from pyspark.ml._typing import ParamMap
+    from py4j.java_gateway import JavaObject, JavaClass
+
+
+T = TypeVar("T")
+JW = TypeVar("JW", bound="JavaWrapper")
+JM = TypeVar("JM", bound="JavaTransformer")
+JP = TypeVar("JP", bound="JavaParams")

Review comment:
       For runtime generics we need actual types.




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[GitHub] [spark] zero323 commented on a change in pull request #35399: [WIP][SPARK-37416][PYTHON][ML] Inline type hints for pyspark.ml.wrapper

Posted by GitBox <gi...@apache.org>.
zero323 commented on a change in pull request #35399:
URL: https://github.com/apache/spark/pull/35399#discussion_r799927208



##########
File path: python/pyspark/ml/base.py
##########
@@ -104,7 +104,7 @@ def next(self) -> Tuple[int, M]:
 
 
 @inherit_doc
-class Estimator(Generic[M], Params, metaclass=ABCMeta):
+class Estimator(Params, Generic[M], metaclass=ABCMeta):

Review comment:
       To ensure consistent MRO. Same as #35367




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