text: #
  # 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 __future__ import print_function
  
  # $example on$
  from pyspark.ml.feature import StringIndexer
  # $example off$
  from pyspark.sql import SparkSession
  
  if __name__ == "__main__":
      spark = SparkSession\
          .builder\
          .appName("StringIndexerExample")\
          .getOrCreate()
  
      # $example on$
      df = spark.createDataFrame(
          [(0, "a"), (1, "b"), (2, "c"), (3, "a"), (4, "a"), (5, "c")],
          ["id", "category"])
  
      indexer = StringIndexer(inputCol="category", outputCol="categoryIndex")
      indexed = indexer.fit(df).transform(df)
      indexed.show()
      # $example off$
  
      spark.stop()
  