Github user yanboliang commented on a diff in the pull request:
https://github.com/apache/spark/pull/10469#discussion_r50681326
--- Diff: python/pyspark/ml/util.py ---
@@ -52,3 +71,141 @@ def _randomUID(cls):
concatenates the class name, "_", and 12 random hex chars.
"""
return cls.__name__ + "_" + uuid.uuid4().hex[12:]
+
+
+@inherit_doc
+class MLWriter(object):
+ """
+ Abstract class for utility classes that can save ML instances.
+
+ .. versionadded:: 2.0.0
+ """
+
+ def __init__(self, instance):
+ self._jwrite = instance._java_obj.write()
+
+ @since("2.0.0")
+ def save(self, path):
+ """Saves the ML instances to the input path."""
+ self._jwrite.save(path)
+
+ @since("2.0.0")
+ def overwrite(self):
+ """Overwrites if the output path already exists."""
+ self._jwrite.overwrite()
+ return self
+
+ @since("2.0.0")
+ def context(self, sqlContext):
+ """Sets the SQL context to use for saving."""
+ self._jwrite.context(sqlContext._ssql_ctx)
+ return self
+
+
+@inherit_doc
+class MLWritable(object):
+ """
+ Mixin for ML instances that provide MLWriter through their Scala
+ implementation.
+
+ .. versionadded:: 2.0.0
+ """
+
+ @since("2.0.0")
--- End diff --
Checked, and it will not exist in classes which are added in later Spark
version.
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