Github user zhengruifeng commented on a diff in the pull request:
https://github.com/apache/spark/pull/13050#discussion_r62955620
--- Diff: examples/src/main/python/ml/simple_params_example.py ---
@@ -18,36 +18,30 @@
from __future__ import print_function
import pprint
-import sys
-from pyspark import SparkContext
from pyspark.ml.classification import LogisticRegression
from pyspark.mllib.linalg import DenseVector
-from pyspark.mllib.regression import LabeledPoint
-from pyspark.sql import SQLContext
+from pyspark.sql import SparkSession
"""
-A simple example demonstrating ways to specify parameters for Estimators
and Transformers.
+An example demonstrating ways to specify parameters for Estimators and
Transformers.
Run with:
bin/spark-submit examples/src/main/python/ml/simple_params_example.py
"""
if __name__ == "__main__":
- if len(sys.argv) > 1:
- print("Usage: simple_params_example", file=sys.stderr)
- exit(1)
- sc = SparkContext(appName="PythonSimpleParamsExample")
- sqlContext = SQLContext(sc)
+ spark = SparkSession \
--- End diff --
You are right. `model1.extractParamMap()` and `model2.extractParamMap()`
are always empty.
And it fails with
```
16/05/12 09:58:48 WARN TaskSetManager: Lost task 2.0 in stage 40.0 (TID
152, localhost): java.lang.IllegalArgumentException: requirement failed:
Logistic Regression getThreshold found inconsistent values for threshold (0.5)
and thresholds (equivalent to 0.55)
at scala.Predef$.require(Predef.scala:224)
at
org.apache.spark.ml.classification.LogisticRegressionParams$class.checkThresholdConsistency(LogisticRegression.scala:143)
```
I will revert this change. Thanks!
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