Borys Biletskyy created SPARK-29428:
---------------------------------------
Summary: Can't persist/set None-valued param
Key: SPARK-29428
URL: https://issues.apache.org/jira/browse/SPARK-29428
Project: Spark
Issue Type: Bug
Components: ML, PySpark
Affects Versions: 2.3.2
Reporter: Borys Biletskyy
{code:java}
import pytest
from pyspark import keyword_only
from pyspark.ml import Model
from pyspark.sql import DataFrame
from pyspark.ml.util import DefaultParamsReadable, DefaultParamsWritable
from pyspark.ml.param.shared import HasInputCol
from pyspark.sql.functions import *
class NoneParamTester(Model,
HasInputCol,
DefaultParamsReadable,
DefaultParamsWritable
):
@keyword_only
def __init__(self, inputCol: str = None):
super(NoneParamTester, self).__init__()
kwargs = self._input_kwargs
self.setParams(**kwargs)
@keyword_only
def setParams(self, inputCol: str = None):
kwargs = self._input_kwargs
self._set(**kwargs)
return self
def _transform(self, data: DataFrame) -> DataFrame:
return data
class TestHasInputColParam(object):
def test_persist_none(self, spark, temp_dir):
path = temp_dir + '/test_model'
model = NoneParamTester(inputCol=None)
assert model.isDefined(model.inputCol)
assert model.isSet(model.inputCol)
assert model.getInputCol() is None
model.write().overwrite().save(path)
NoneParamTester.load(path) # TypeError: Could not convert <class
'NoneType'> to string type
def test_set_none(self, spark):
model = NoneParamTester(inputCol=None)
assert model.isDefined(model.inputCol)
assert model.isSet(model.inputCol)
assert model.getInputCol() is None
model.set(model.inputCol, None) # TypeError: Could not convert <class
'NoneType'> to string type
{code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
