pyspark 实现的wordcount

pyspark 实现的wordcount。

from pyspark.sql import SparkSession, DataFrame

spark = SparkSession 
    .builder 
    .master("local[*]")
    .appName("PythonWordCount") 
    .config("spark.driver.host", "localhost")
    .getOrCreate()

res_rdd = spark.read.text('E:/test.txt').rdd 
    .map(lambda r: r[0]) 
    .flatMap(lambda x: x.split()) 
    .map(lambda x: (x, 1)) 
    .reduceByKey(lambda x, y: x + y) 
    .collect()