Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/17421#discussion_r108026673
--- Diff: python/pyspark/ml/stat.py ---
@@ -0,0 +1,102 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+from pyspark import since, SparkContext
+from pyspark.ml.common import _java2py, _py2java
+from pyspark.ml.wrapper import _jvm
+
+
+class ChiSquareTest(object):
+ """ Conduct Pearson's independence test for every feature against the
label. For each feature,
+ the (feature, label) pairs are converted into a contingency matrix for
which the Chi-squared
+ statistic is computed. All label and feature values must be
categorical.
+
+ The null hypothesis is that the occurrence of the outcomes is
statistically independent.
+
+ :param dataset:
--- End diff --
Copy param text from the Scala doc, unless there's a need to customize it
for Python
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