Github user sethah commented on a diff in the pull request:
https://github.com/apache/spark/pull/11939#discussion_r59885374
--- Diff: python/pyspark/ml/param/__init__.py ---
@@ -439,12 +441,26 @@ def _set(self, **kwargs):
self._paramMap[p] = value
return self
+ def _clearParam(self, param):
+ """
+ Clears a param from the param map if it has been explicitly set.
+ """
+ if self.isSet(param):
+ del self._paramMap[param]
+
def _setDefault(self, **kwargs):
"""
Sets default params.
"""
for param, value in kwargs.items():
- self._defaultParamMap[getattr(self, param)] = value
+ p = getattr(self, param)
+ if value is not None and not isinstance(value, JavaObject):
--- End diff --
The type converter for `stopWordsRemover` is defined as
`TypeConverters.toListString` so this will fail without the check.
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