Adding source code for chapter 8

Chapter8/rdd/rddtransform2.py

@@ -0,0 +1,13 @@
+#rddtransform2.py: rdd tranformation function-map
+
+#please ignore next 2 statements if running directly in PySpark shell
+from pyspark.sql import SparkSession
+spark = SparkSession.builder.master("local[*]")\
+    .appName("RDD Test app")\
+    .getOrCreate()
+
+data = [5, 4, 6, 3, 2, 8, 9, 2, 8, 7,
+        8, 4, 4, 8, 2, 7, 8, 9, 6, 9]
+rdd1 = spark.sparkContext.parallelize(data)
+rdd2 = rdd1.filter(lambda x: x % 2 !=0 )
+print(rdd2.collect())