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Diffstat (limited to 'examples/src/main/python/parquet_inputformat.py')
-rw-r--r-- | examples/src/main/python/parquet_inputformat.py | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/examples/src/main/python/parquet_inputformat.py b/examples/src/main/python/parquet_inputformat.py new file mode 100644 index 0000000000..c9b08f878a --- /dev/null +++ b/examples/src/main/python/parquet_inputformat.py @@ -0,0 +1,59 @@ +# +# 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. +# + +import sys + +from pyspark import SparkContext + +""" +Read data file users.parquet in local Spark distro: + +$ cd $SPARK_HOME +$ export AVRO_PARQUET_JARS=/path/to/parquet-avro-1.5.0.jar +$ ./bin/spark-submit --driver-class-path /path/to/example/jar \\ + --jars $AVRO_PARQUET_JARS \\ + ./examples/src/main/python/parquet_inputformat.py \\ + examples/src/main/resources/users.parquet +<...lots of log output...> +{u'favorite_color': None, u'name': u'Alyssa', u'favorite_numbers': [3, 9, 15, 20]} +{u'favorite_color': u'red', u'name': u'Ben', u'favorite_numbers': []} +<...more log output...> +""" +if __name__ == "__main__": + if len(sys.argv) != 2: + print >> sys.stderr, """ + Usage: parquet_inputformat.py <data_file> + + Run with example jar: + ./bin/spark-submit --driver-class-path /path/to/example/jar \\ + /path/to/examples/parquet_inputformat.py <data_file> + Assumes you have Parquet data stored in <data_file>. + """ + exit(-1) + + path = sys.argv[1] + sc = SparkContext(appName="ParquetInputFormat") + + parquet_rdd = sc.newAPIHadoopFile( + path, + 'parquet.avro.AvroParquetInputFormat', + 'java.lang.Void', + 'org.apache.avro.generic.IndexedRecord', + valueConverter='org.apache.spark.examples.pythonconverters.IndexedRecordToJavaConverter') + output = parquet_rdd.map(lambda x: x[1]).collect() + for k in output: + print k |